Journal of Inorganic and Organometallic Polymers and Materials - Aktuelle Forschungsartikel
Aktuelle Forschungsartikel: Metallorganik
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Hier aufgeführte Forschungsartikel:
Journal of Inorganic and Organometallic Polymers and Materials - Verlag: Springer
Das Journal ist eine umfassende Informationsquelle für Berichte über die neuesten theoretischen und experimentellen Forschungsergebnisse. Die vierteljährlich erscheinende Zeitschrift umfasst ein breites Spektrum von synthetischen und natürlichen Substanzen, die Hauptgruppenelemente, Übergangs- und innere Übergangselemente enthalten. Die Publikation enthält vollständige Originalarbeiten und kürzere Kommunikations- sowie aktuelle Übersichtsartikel, die die Synthese, Charakterisierung, Evaluierung und Phänomene der anorganischen und metallorganischen Polymere, Materialien und supramolekularen Systemen behandeln.
Organometallic derivatives of the cyclotriphosphazene N3P3[OC6H4CH2CN·TiClCp2]6(1), N3P3(O6H5)5[OC6H4N·W(CO)5] (2), N3P3[OC6H4CH2CN·Mo(CO)5]6(3), [N3P3(O6H5)5(OC5H4N·CpRu(PPh3)2)][PF6] (4), [N3P3(O2C12H8)2OC5H4N·Ag(PPh3)][OSO2CF3] (5), N3P3[OC6H5]5 [OC5H4N·Cu][PF6] (6) and N3P3[OC6H4CH2CN·CuCl]6[PF6]6(7),were incorporated inside SiO2 through the sol–gel method. The metal–organic nanocomposites of the general formula N3P3[OC6H4CH2CN·TiClCp2]6·nSiO2(G1), N3P3[OC6H4N·W(CO)5]·nSiO2(G2), N3P3[OC6H4CH2CN·Mo(CO)5]6·nSiO2(G3), N3P3(O6H5)5OC5H4N·CpRu(PPh3)2][PF6]·nSiO2(G4), [N3P3(O2C12H8)2OC5H4N·Ag(PPh3)][OSO2CF3]·nSiO2(G5), N3P3[OC6H5]5[OC5H4N·Cu][PF6]·(SiO2)n(G6), and N3P3[OC6H4CH2CN·CuCl]6[PF6]6·(SiO2)n(G7), were characterized by IR spectroscopy; 12C, 31 P and 29Si MAS NMR measurements as well as UV–Visible diffuse reflectance spectra, indicating the presence of the respective organometallic
derivatives of the cyclotriphosphazene incorporated into SiO2. Pyrolysis of these nanocomposites under air at 800 °C gives rise to nanostructured metal-oxides and metal phosphates incorporated
into amorphous SiO2, with the presence in some cases of complexes phase mixtures. From some precursors, we obtained metal-oxides/phosphates nanoparticles
separated from the SiO2 nanoparticles instead the oxides/phosphates nanoparticles inside the SiO2 matrix. Additionally and for comparison purposes, we used the compound N3P3[NH(CH2)3Si(OEt)3]6 as gelator. Nanocomposites (G?1), (G?2) and (G?3) exhibited mainly morphological differences while in some cases composition differences when using TEOS as gelator. Some simple
metal-containing compounds as (O3SCF3)Ag(PPh3)(HOC5H4N), [CuCl2·NC5H4OH] and [CuCl2·NCCH2C6H4OH]—which are useful models of the most complexes (G5), (G6) and (G7) were also prepared and incorporated in amorphous silica. Their pyrolytic products were compared with those of more complex
cyclotriphosphazene analogous. Interestingly, the pyrolysis of the nanocomposite [(O3SCF3)Ag(PPh3)(HOC5H4N)][SiO2]n affords the firstly-reported materials containing Ag2O along with SiO2 nanoparticles.
Content Type Journal Article
Pages 1-12
DOI 10.1007/s10904-012-9692-x
Authors
Carlos Díaz, Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425 Ñuñoa, Casilla 653, Santiago, Chile
María Luisa Valenzuela, Departamento de Ciencias Quimica, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Republica 275, Santiago, Chile
Daniel Carrillo, Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425 Ñuñoa, Casilla 653, Santiago, Chile
José Riquelme, Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425 Ñuñoa, Casilla 653, Santiago, Chile
Renato Díaz, Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425 Ñuñoa, Casilla 653, Santiago, Chile
A new compound, namely [Zn2(L1)2(H2O)]n (1, H2L1 = 5–(benzyloxy)isophthalic acid), was hydrothermally synthesized and characterized by elemental analysis, FT-IR spectra
and powder X-ray diffraction. Single crystal x-ray diffraction reveals that 1 features a three-dimensional framework with the tails (phenyl groups) of the organic ligands (L1) effectively filling in
the hexagonal channels and playing a template role. Compound 1 exhibits an intense violet photoluminescence in the solid state at room temperature.
Content Type Journal Article
Category Communication
Pages 1-5
DOI 10.1007/s10904-012-9690-z
Authors
Xin Zhang, Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 Fujian, People’s Republic of China
Jin-Xia Yang, Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 Fujian, People’s Republic of China
Yuan-Gen Yao, Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 Fujian, People’s Republic of China
The self assembly of [Ni(L)]Cl2·2H2O (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,01.18,07.12]docosane) and 1,2,3,4-cyclobutanetetracarboxylic acid (H4cbtc) acid generates a 1D coordination and 2D hydrogen-bonded polymer [Ni(L)(H2cbtc)2·3H2O]n (1). Complex 1 is characterized by X-ray crystallography, spectroscopy and magnetic susceptibility. Each nickel(II) ion has a distorted
octahedral coordination environment with the four secondary amines of the macrocycle in which two carboxylate anions of the
H2cbtc2? ligand have assembled around each nickel center. The compound crystallizes in the triclinic system P-1 with a = 9.715(3) Å, b = 12.891(5) Å, c = 13.903(6) Å, ? = 72.64(2)°, ? = 75.70(3)°, ? = 73.27(3)°, V = 1566.6(10) Å3, Z = 2. The electronic spectrum of 1 indicates a high-spin octahedral environment. The magnetic behavior of 1 reveals a weak intramolecular antiferromagnetic interaction with J = ?1.23(1) cm?1.
Content Type Journal Article
Category Communication
Pages 1-6
DOI 10.1007/s10904-012-9693-9
Authors
Ki-Young Choi, Department of Chemistry Education, Kongju National University, Kongju, 314-701 Korea
In-Taek Lim, Department of Chemistry Education, Kongju National University, Kongju, 314-701 Korea
The synthesis of covalent multi-functionalized single-walled carbon nanotubes (SWNT) via the combination of two diazonium
salt addition reactions with tetrabutylammonium hydroxide to form carbon nanotube salts was carried out. The formation of
carbon nanotube salts allows SWNT to be easily dissolved in common solvents, which increases the processing capability of
the SWNT. The dissolutions of some of the obtained products can be increased three-fold through multi-functionalization. Thus
tetrabutylammonium cation plays an extraordinarily important role; i.e., balancing the charges on the functionalized SWNT
surface and de-bundling of the functionalized SWNT. This approach provides a useful way of preparing some SWNT-containing
biomaterials. The multi-functionalized SWNT were confirmed by standard techniques used for carbon nanotube characterization.
Content Type Journal Article
Category Communication
Pages 1-7
DOI 10.1007/s10904-012-9689-5
Authors
Feng Wang, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China
Ke-Jian Deng, Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, South-Central University for Nationalities, Wuhan, 430074 People’s Republic of China
Li Zhou, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China
Jin-Bo Zhao, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China
Xiao-Huan Ke, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China
Li-Li Wen, Key Laboratory of Pesticide and Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China
A new coordination polymer, [Zn3(tza)3(H2O)3]n (1) which H2tza = 1H-tetrazolate-5-acetic acid has been synthesized and characterized by IR spectroscopy, elemental analysis X-ray crystallography.
The single-crystal X-ray data of compound 1 show existence of three different ZnII ion with different coordination spheres, hexagonal, pyramidal and pentagonal. This
coordination polymer used as a precursor for preparation of zinc(II) oxide nano-particles. Nano-particles were characterized
by powder X-ray powder diffraction and the its morphology characterized by scanning electron microscope.
Content Type Journal Article
Pages 1-5
DOI 10.1007/s10904-012-9691-y
Authors
Mohammad Sadegh Yazdan Parast, Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Islamic Republic of Iran
Ali Morsali, Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Islamic Republic of Iran
In the present work, ZnAl2O4 nanoparticles have been synthesized with the aid of Zn(OAc)2·2H2O and Al(NO3)3·9H2O as starting reagents in the presence of microwave irradiation. Besides, the effect of preparation parameters such as microwave
power and irradiation time on the morphology and particle size of products was studied by SEM images. The as-prepared ZnAl2O4 nanoparticles were characterized extensively by techniques like XRD, TEM, SEM, FT-IR, PL, and EDS. Photoluminescence studies
of the ZnAl2O4 nanoparticles displayed quantum confinement behavior with band gap of 3.2 eV. The XRD studies showed that pure orthorhombic
ZnAl2O4 nanoparticles have been produced after calcination.
Content Type Journal Article
Pages 1-8
DOI 10.1007/s10904-012-9695-7
Authors
Mehdi Ranjbar, Institute of Nano Science and Nano Technology, University of Kashan, P.O. Box 87317–51167, Kashan, Islamic Republic of Iran
Masoud Salavati-Niasari, Institute of Nano Science and Nano Technology, University of Kashan, P.O. Box 87317–51167, Kashan, Islamic Republic of Iran
S. Mostafa Hosseinpour-Mashkani, Center for Nanoscience and Technology, IST, Jawaharlal Nehru Technological University Hyderabad, Hyderabad, 500 085 Andhra Pradesh, India
Reaction of diglycolic acid (dgaH2) and silver nitrate under ultrasonic condition forms a 3D supramolecular complex of composition [Ag4(dga)2]n (1) (dgaH2 = diglycolic acid). The structure of the complex was determined by single crystal X-ray diffraction analysis. Structural
study reveals that two types of Ag(I) centers are present. Short silver–silver bond is present in the compound. It is observed
that the 2D layers formed by silver(I) and dga2? ions interact further to form an overall 3D network. A new octadentate coordination mode of diglycolate ligand is identified.
Photoluminescent and thermogravimetric characterization of the complex have been done.
Graphical Abstract
New 3D silver coordination polymer of silver(I) having ligand supported Ag–Ag bond has been synthesized using diglycolic acid
ligand and characterized by X-ray diffraction, photoluminescence and TG analysis. The ligand shows new type of coordination
in the complex
.
Content Type Journal Article
Pages 1-7
DOI 10.1007/s10904-012-9685-9
Authors
Madhusudan Bera, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Abhinandan Rana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Durga Sankar Chowdhuri, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Debdoot Hazari, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Swapan Kumar Jana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Horst Puschmann, Department of Chemistry, Durham University, Durham, DH1 3LE UK
Sudipta Dalai, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Two lanthanide-based metal–organic frameworks with flexible alicyclic carboxylate ligands, generally formulated as [Sm(TMG)(HTMG)(H2O)] (1) and [Nd2(CHDC)3(H2O)] (2), have been successfully synthesized and characterized. They represent the first example of lanthanide-TMG and lanthanide-CHDC
systems. Their structures range from 1D infinite chains to 2D extended layer structure. Complexes 2 exhibit strong fluorescent emissions in the near-infrared region at room temperature. Interestingly, the structural difference
between compounds 1 and 2 indicates the pH values have subtle influence on the coordination modes of ligands and dimension of LMOFs.
Content Type Journal Article
Pages 1-6
DOI 10.1007/s10904-012-9688-6
Authors
Xian-Dong Zhu, College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu, 241000 People’s Republic of China
Zhi-Xi Hang, College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu, 241000 People’s Republic of China
Jun Zhao, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 People’s Republic of China
Jin-Run He, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 People’s Republic of China
Yu-Ling Wang, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 People’s Republic of China
Three mixed-ligand coordination polymers [Cu(H2pm)(na)2(H2O)2]n·4nH2O (1), [Ni(H2pm)(pa)2]n·4nH2O (2), [Co(H2pm)(pa)2]n·4nH2O (3) (H2pm = dianion of pyromellitic acid, na = nicotinamide, pa = picolinamide) were investigated mainly from the point of supramolecular
architecture in their respective crystal packings. The structural properties of 1–3 were characterized by X-ray diffraction technique and Fourier transform infrared (FT-IR) spectroscopy. In all complexes,
the metal centers are bridged by pyromellitate ligands to form 1D polymer chains of 2,2-TT type. However, these chains propagate
in a different way as linear or zig-zag fashions. The polymer chains are connected by N–H···O hydrogen bonds to form sheet
structures which include dimeric water clusters. The complexes have different supramolecular networks with respect to the
behavior of dimeric water clusters between the sheet structures. The FT-IR investigation of the complexes was performed within
the mid-IR region, mainly focusing on the characteristic vibrations of pyromellitic acid, nicotinamide and picolinamide moieties
by considering their free states and ligand behaviours in the case of complex formation. The magnetic properties of 1–3 were investigated by electron paramagnetic resonance (EPR) spectroscopy and magnetic susceptibility measurements. EPR studies
of 1 and 2 show that the paramagnetic centers have axially symmetric g values and unpaired electrons are dominantly in
dx2 - y2
ground state. The magnetic susceptibility results indicate possible antiferromagnetic (1 and 2) and ferromagnetic (3) couplings mediated by the carboxylate bridges between the metal centers.
Graphical Abstract
The adjacent supramolecular sheets are linked by dimeric water clusters.
Content Type Journal Article
Pages 1-13
DOI 10.1007/s10904-012-9686-8
Authors
Gökhan Ka?ta?, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, Samsun, Turkey
Tu?ba Ak Aycan, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, Samsun, Turkey
Hümeyra Pa?ao?lu, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, Samsun, Turkey
Can Kocab?y?k, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, Samsun, Turkey
Bünyamin Karabulut, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, Samsun, Turkey
Clusters of DyBa2Cu3O7?y high TC type II nanosuperconductor were prepared by sol–gel method in the presence of biopolymer chitosan. At the first step, the
precursor and biopolymer were aggregated into amorphous matrix and then hydrogels were formed by thermogelling. Nucleation
and growth of discrete nanoparticles is controlled by the biopolymer gel owing to retention of the fibrous nature of the chitosan
at high temperatures up to 500 °C. After heating to 900 °C and complete decomposition of BaCO3, nanoparticles of DyBa2Cu3O7?y superconductor with diameter of 10–20 nm in the form of nanoclusters are prepared. Critical temperature (Tc) of the nanoparticles was found to be above 83 K. Characterizations of specimens were performed using scanning electron microscopy
and transmission electron microscopy, supported by other techniques including XRD diffraction, energy dispersive X-ray, FT-IR
spectrum and magnetic susceptibility measurements.
Content Type Journal Article
Pages 1-6
DOI 10.1007/s10904-012-9687-7
Authors
Sima Alikhanzadeh-Arani, Department of Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
Masoud Salavati-Niasari, Institute of Nano Science and Nano Technology, University of Kashan, P. O. Box. 87317–51167, Kashan, Iran
Mohammad Almasi-Kashi, Department of Physics, University of Kashan, Kashan, Iran
Two complexes, [Zn(qda)(bpp)]n (1) and {[Cd(qda)(bpp)2]·2H2O}n (2), (H2qda = hydroquinone-O,O?-diacetic acid, bpp = 1,3-bis(4-pyridyl)propane), were hydrothermally synthesized and characterized by single crystal X-ray
diffraction analysis, FTIR and elemental analysis. Both compounds exhibit two-dimensional structures. The qda anions in compound
1 adopt two different trans conformations, coordinating to Zn2+ ions in a monodentate fashion, while in compound 2 they adopt only one trans conformation yet keeping the same coordination fashion as in compound 1. The bpp molecules show same anti-gauche coordination conformation in both 1 and 2. In addition, photoluminescence for 1 and 2 has been investigated in the solid state at room temperature.
Content Type Journal Article
Pages 1-5
DOI 10.1007/s10904-012-9684-x
Authors
Baoyong Zhu, Key Laboratory of Coordination Chemistry and Functional Materials in Universities of Shandong (Dezhou University), Department of Chemistry, Dezhou University, Dezhou, 253023 Shandong, People’s Republic of China
Electron beam irradiation was applied to prepare poly (vinyl alcohol) and poly (acrylic acid) P (PVA/AAc) containing nickel
and silver nanoparticles. The prepared P (PVA/AAc)–Ni and P (PVA/AAc)–Ag nanoparticles were characterized by Fourier-transform
infrared, UV–Visible spectroscopy, X-ray diffraction (XRD) and transmission electron microscope (TEM). The electrical conductivity
and thermal gravimetrical analysis (TGA) have been investigated. Bacterial sensitivity toward nickel and silver nanoparticles
was studied. The XRD and TEM confirmed that by increasing the Ni or Ag contents from 10 to 150 mmol in the copolymers, the
metal particle size increases from 27.6 to 45.6 nm for Ni and from 14.8 to 37.4 nm for Ag. Meanwhile, the mean size particle
increases from 33.02 to 45.05 nm for Ni and from 15.5 to 44.03 nm for Ag. The electrical conductivity of the polymer containing
Ag is higher than that of Ni and it increased by increasing the metal content. The TGA studies confirmed that, the thermal
stability increase by the introduction of metal into polymeric complex. Bacterial sensitivity to metal nanoparticles was found
to vary depending on the microbial species. Disc diffusion studies with P. aeruginosa, E. coli and K. pneumoniae revealed greater effectiveness of the silver nanoparticles compared to the nickel nanoparticles, S. aureus depicted the highest sensitivity to nanoparticles compared to the other strains and was more adversely affected by the nickel
nanoparticles.
Content Type Journal Article
Pages 1-13
DOI 10.1007/s10904-012-9683-y
Authors
M. Eid, National Center for Radiation Research and Technology, Nasr City, Cairo, Egypt
Dalia E. Hegazy, National Center for Radiation Research and Technology, Nasr City, Cairo, Egypt
Polysiloxanes can be formed into a variety of elastomeric networks that are of fundamental as well as commercial interest.
This review, which primarily focuses on the author’s own work, illustrates the use of experiments and simulations to establish
structure–property relationships for these materials. Studies of this type have been very useful in obtaining a better molecular
understanding of rubberlike elasticity in general.
Content Type Journal Article
Pages 560-563
DOI 10.1007/s10904-012-9662-3
Authors
James E. Mark, Department of Chemistry and the Polymer Research Center, The University of Cincinnati, Cincinnati, OH 45221, USA
Organotin compounds have been used to catalyze the condensation of various ?,?-dihydroxyl terminated organosiloxane diols.
This tin catalyzed reaction extends the length of siloxane chains and it also produces narrow molar mass distribution polyorganodisilanols
(Mw/Mn = 1.4). The reaction occurs between a variety of siloxanes that are terminated with hydroxyl groups and it does not depend
on the organic side groups connected to silicon for the systems studied here. These systems include silicon atoms bearing
dimethyl, methylphenyl or methyl 1,1,1 trifluoropropyl substituents. The organotin catalyst in the reaction facilitates the
organosilanol condensation releasing water as a byproduct. However it does not appear to facilitate the opening of siloxane
bonds nor the redistribution of siloxane bonds under the conditions employed here. Copolymerization of linear oligomeric dimethylsiloxane
diol and linear oligomeric methylphenylsiloxanediol was found to give a relatively equal reactivity of homo polymerization
and hetro polymerization in the condensation and randomly alternating segmented block copolymers that were formed. The reaction
kinetics of the polymerization was used to experimentally verify the fact that there is a chain length dependence of the reacting
silanol end-groups. The molar mass values during the polymerizations were determined using gel permeation chromatography.
The chromatography, viscosity and FTIR results demonstrate that the reactivity of the hydroxyl end-groups in the polycondensation
reaction decreases upon increasing the chain length of the siloxane. It therefore appears that these tin catalyzed siloxane
systems deviate from the widely demonstrated hypothesis of Paul Flory on the “equal reactivity of functional groups” for step-growth
polymerizations.
Content Type Journal Article
Pages 577-587
DOI 10.1007/s10904-011-9598-z
Authors
Chung Mien Kuo, Department of Chemical and Materials Engineering, and the Polymer Research Centre, University of Cincinnati, Cincinnati, OH 45221-0012, USA
Stephen John Clarson, Department of Chemical and Materials Engineering, and the Polymer Research Centre, University of Cincinnati, Cincinnati, OH 45221-0012, USA
Crystalline and nano-structure of a new Pb(II) coordination polymer, [Pb(NO2)(2-quc)]n (1), {Hquc = 2-quinoline carboxylic acid} is synthesized via heat gradient and sonochemical methods, respectively. The newly
synthesized structures are characterized by scanning electron microscopy (SEM), X- ray powder diffraction (XRD), IR and 1HNMR spectroscopies, elemental analyses and single crystal X-ray diffraction is used to understand the exact structure of
the crystalline 1. Thermal stability of nano and bulk samples of compound 1 are studied and compared through thermal gravimetric and differential thermal analyses. PbO nanoparticles are then produced
by calcination of the nano-structure of compound 1 at 600 °C. The obtained PbO is characterized by XRD and SEM analyses.
Content Type Journal Article
Pages 1-8
DOI 10.1007/s10904-012-9674-z
Authors
Akram Panjehpour, Department of Chemistry, Payame Noor University, Tehran, Islamic Republic of Iran
Ali Morsali, Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P. O. Box 14155-4838, Tehran, Islamic Republic of Iran
The preparation of micro hexagonal-rods of a new 1D polymeric lead(II) complex containing the Pb2-(?-N3)2 motif, [Pb(dmp)(N3)2]n (dmp is the abbreviation of 2,9-dimethyl-1,10-phenanthroline) by the sonochemical method is described. The new microcrystal
is characterized by scanning electron microscopy, X-ray diffraction (XRD), elemental analyses and infrared spectroscopy. A
single crystalline material is obtained by applying a heat gradient applied to a solution of the reagents. The single-crystal
XRD analyses show that the coordination number for the Pb(II) ions is six, PbN6, with “stereo-chemically active” electron
lone pairs and the coordination sphere being hemidirected. The single-crystal X-ray data show the chains of [Pb(dmp)(N3)2]n interact with each other through the ?–? stacking interactions, which create a 3D framework.
Content Type Journal Article
Category Communication
Pages 1-7
DOI 10.1007/s10904-012-9681-0
Authors
Younes Hanifehpour, WCU Nano Research Center, Yeungnam University, Gyeongsang, 712-749 Korea
Babak Mirtamizdoust, WCU Nano Research Center, Yeungnam University, Gyeongsang, 712-749 Korea
Sang Woo Joo, WCU Nano Research Center, Yeungnam University, Gyeongsang, 712-749 Korea
A novel nano-rods cadmium(II) fluorine-substituted ?-diketonate, [Cd(2,2?-bpy)(dfpb)2] (1), (2,2?-bpy = 2,2?-bipyridine; dfpb = 4,4-difluoro-1-phenyl-1,3-butandion) has been synthesized by a sonochemical method
that produces the coordination compound with nano dimensions. The new nanostructure was characterized by scanning electron
microscopy, X-ray powder diffraction (XRD) elemental analysis and IR spectroscopy. Compound 1 was structurally characterized by single crystal X-ray diffraction. The single-crystal structure of this complex shows that
the coordination number of the CdII ions is six with two N-donor atoms from the 2,2?-bpy ligand and four O-donors from two dfpb. Self-assembly of the complex
occurs through CH···F–C and ?–? stacking interactions. The supramolecular features of 1 are controlled by weak directional intermolecular interactions. CdO nanoparticles were obtained by thermolysis of 1 at 180 °C with oleic acid as a surfactant. The average diameter of the nanoparticles was estimated by the Scherrer equation
to be 20 nm. The morphology and size of the CdO samples were further observed using SEM.
Content Type Journal Article
Category Communication
Pages 1-6
DOI 10.1007/s10904-012-9682-z
Authors
Younes Hanifehpour, WCU Nano Research Center, School of Mechanical Engineering, Yeungnam University, Gyongsan, 712-749 South Korea
Sanaz Mokhtari Asl, Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
Babak Mirtamizdoust, WCU Nano Research Center, School of Mechanical Engineering, Yeungnam University, Gyongsan, 712-749 South Korea
Sang Woo Joo, WCU Nano Research Center, School of Mechanical Engineering, Yeungnam University, Gyongsan, 712-749 South Korea
The crystal structure of the title compound, C32H40Ca4N8O36S8, was determined at 296 K. The parameters that belong to this structure are a = 12.9812(9) ?, b = 7.0377(3) ?, c = 16.3973(12) ?, ? = 109.175(5)o and Z = 4. The complex crystallizes in the centrosymmetric monoclinic space group P21/c and calcium(II) has eight coordination. The crystal structure indicates a two dimension coordination polymer with three intralayer
hydrogen bonds. The crystal structure with at the acesulfamato ligands and Ca2+ ion is the first synthesized two-dimensional polymeric structure. The geometric parameters, which are obtained from X-ray
determination, and the theoretical parameters, which are calculated by using density functional theory (B3LYP) with the 6-31G
basis sets, are compared. Experimental IR, theoretical IR calculations, molecular electrostatic potential and frontier molecular
orbital calculations are presented.
Content Type Journal Article
Pages 1-9
DOI 10.1007/s10904-012-9679-7
Authors
Güne? Demirta?, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun, Turkey
Necmi Dege, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun, Turkey
Hasan ?çbudak, Department of Chemistry, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun, Turkey
Ömer Yurdakul, Department of Chemistry, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun, Turkey
Orhan Büyükgüngör, Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun, Turkey
Two new coordination polymers [Zn(L)(bib)]n (1) and [Zn(L)(bib)0.5]n (2) [L = 5-hydroxyisophthalic acid and bib = 1,4-bis(2-methyl-imidazol-1-yl)butane] have been synthesized and characterized. X-ray
single crystal diffractions show that complex 1 is a 2D layered structure and complex 2 is a 3D 6-connected topological net. Complex 1 are further assembled into a 3D supramolecular structure by intermolecular hydrogen bonding. Complex 2 features a two-fold interpenetrated pcu topology. Moreover, the fluorescent properties of complexes 1 and 2 were studied in the solid state at room temperature.
Content Type Journal Article
Category Communication
Pages 1-6
DOI 10.1007/s10904-012-9680-1
Authors
Jiakun Xu, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071 China
Xiaochun Sun, National Oceanographic Center, Qingdao, 266071 China
Yuhua Fan, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
Caifeng Bi, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100 China
Mi Sun, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071 China
Micro-phase separation in hexamethylynediisocyanate-polyurea was studied using small-angle X-ray scattering and infrared absorption.
It was found that phase separation in this system followed spinodal-like decomposition on a 3–4 nm size scale with phase separation
occuring on a time scale of days.
Content Type Journal Article
Pages 624-628
DOI 10.1007/s10904-012-9669-9
Authors
Amit S. Kulkarni, SABIC Innovative Plastics, 1 Lexan Lane, Mt. Vernon, IN 47620, USA
Gregory Beaucage, Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
Garth L. Wilkes, Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24601, USA
Sudipto Das, Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24601, USA
Iskander Yilgor, Department of Chemistry, Kóc University, Istanbul, 34450 Turkey
Inhibition effects of novel organotin(IV) esters of (E)-4-oxo-4-((3-trifluoromethyl)phenyl)amino)but-2-enoic acid have been studied against bacterial, fungal, tumoral and insecticidal
strains. The complexes have shown potency against all these strains and is attributed to the multiple interactive sites of
the ligand that not only change the environment around tin but also can make interactions with DNA. The synthesized complexes
were characterized by physical, spectral, analytical and multinuclear nmr (1H, 13C, 119Sn) data. The X-ray structure analysis of the complex is reported.
Content Type Journal Article
Pages 1-10
DOI 10.1007/s10904-012-9671-2
Authors
Aziz ur-Rehman, Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
Mukhtiar Hussain, Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad, 45320 Pakistan
Abdul Rauf, Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
Asif Ali Tahir, Loughbrough University, Leicestershire, LE11 3TU UK
Saqib Ali, Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad, 45320 Pakistan
Nano rods of a new 1D polymeric lead(II) complex containing the Pb2-(?-N3)2 motif, [Pb(phen)(?-N3)(?-NO3)]n (phen = 1,10-phenanthroline), has been synthesized by a sonochemical method. The new nano-structure was characterized by
scanning electron microscopy, X-ray powder diffraction, elemental analyses and IR spectroscopy. A single crystalline material
was obtained by applying a heat gradient to a solution of reagents. The single crystal X-ray data showed the coordination
number of the Pb2+ ions to be eight (PbN4O4), with the Pb2+ ions having “stereo-chemically active” electron lone pairs; the coordination sphere was hemidirected. The chains of [Pb(phen)(?-N3)(?-NO3)]n interact with each other via ?–? interactions to create a 3D framework. PbO nanoparticles were obtained by thermolysis of
1 at 180 °C with oleic acid as a surfactant. The average diameter of the nanoparticles was estimated to be 33 nm by the Scherrer
equation. The morphology and size of the prepared PbO samples were further observed using SEM.
Content Type Journal Article
Pages 1-6
DOI 10.1007/s10904-012-9675-y
Authors
Younes Hanifehpour, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
Babak Mirtamizdoust, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
Arezou Rahnemaye Farzam, Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
Sang Woo Joo, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
Nanorods of a lead(II) supramolecular three-dimensional (3D) coordination compound, [Pb(tfpb)2]n (1) (Htfpb = 4,4,4-trifluoro-1-phenyl-1,3-butanedione), was prepared by the sonochemical method. The new nano-structure was
characterized by scanning electron microscopy, X-ray powder diffraction, elemental analyses and IR spectroscopy. A single-crystal
structure of the compound showed that the coordination number of Pb(II) is eight with six O-donor atoms from the tfpb ligand
and two F-donors from anionic ligands. The 3D supramolecular structure of 1 is realized by weak directional C–F···F–C and ?–? stacking interactions. After calcination of nano-sized 1 at 500 °C, pure phase nano-sized lead(II) oxide is produced.
Content Type Journal Article
Pages 1-5
DOI 10.1007/s10904-012-9678-8
Authors
Younes Hanifehpour, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
Babak Mirtamizdoust, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
Sang Woo Joo, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 Korea
2-amino-6-nitro-benzothiazole and thiosemicarbazide with formaldehyde (BTF) terpolymer ligand and its metal complexes have
been synthesized. The plausible structure of the synthesized BTF terpolymer ligand was elucidated on the basis of elemental
analysis and spectral studies such as FTIR, UV-Vis, 1H and 13C NMR spectroscopy. Gel permeation chromatography (GPC) was used to determine the molecular weight of the terpolymer. The
terpolymer metal complexes were analyzed by elemental analysis, molar conductivity measurements, and magnetic susceptibilities.
The structure and geometry of the metal complexes were confirmed by various spectral techniques viz. electronic, ESR, FTIR
and NMR spectroscopy. The morphology of the BTF terpolymer ligand and its metal complexes was examined using scanning electron
microscopy (SEM) and X-ray diffraction (XRD) analysis. The thermal decomposition behaviour of the terpolymer ligand and its
complexes was determined using thermogravimetric analysis (TGA). Freeman–Carroll (FC), Sharp–Wentworth (SW) and Phadnis–Deshpande
(PD) methods were used to calculate the thermal activation energy (Ea), order of reaction (n), entropy change (?S), free energy change (?F), apparent entropy (S*) and frequency factor (Z) from
the TGA data. Phadnis–Deshpande method was also used to propose the thermal degradation model for the decomposition pattern
of the terpolymer ligand. The terpolymer ligand and its metal complexes were screened for its antimicrobial activity against
chosen microbes.
Content Type Journal Article
Pages 1-16
DOI 10.1007/s10904-012-9677-9
Authors
Mohamed A. Riswan Ahamed, Department of Chemistry, Oxford Engineering College, Pirattiyur, Tiruchirappalli, 620 009 Tamil Nadu, India
Abdul R. Burkanudeen, PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), Tiruchirappalli, 620 020 Tamil Nadu, India
A new one-dimensional copper(II) polymer with formula of [Cu2(heae)(tpa)]n·nH2O, where heae2? and tpa2? stand for the dianions of N,N?-bis(N-hydroxyethylaminoethyl)oxamide and terephthalic acid, respectively, has been synthesized and characterized by elemental analysis,
conductivity measurement, IR and electronic spectral studies, and single-crystal X-ray diffraction. The crystal structure
consists of a one-dimensional copper(II) coordination polymeric chain constructed by the [Cu2(heae)]2+ cations as the inorganic second building units (SBUs) and the tpa2? anions as linkers. The Cu···Cu separations through the bridges of heae2? and tpa2? are 5.2472(6) and 10.9677(8) Å, respectively. Both the copper(II) ions have square pyramidal coordination geometries. A three-dimensional
hydrogen bonding network is observed in the crystal. The measured molar conductivity suggests that the polymer may stay intact
in solution as the 1D polymer in the crystal. The cytotoxicities of the polymeric copper(II) complex were tested by Sulforhodamine
B (SRB) assays against human hepatocellular carcinoma cell SMMC-7721 and human lung adenocarcinoma cell A549. The polymer
exhibits potent cytotoxic effects against the two cell lines. The binding properties of the copper(II) polymer with herring
sperm DNA (HS-DNA) have been investigated by using UV absorption and fluorescence spectra and electrochemical techniques and viscosity.
The results show that the copper(II) polymer interacts with HS-DNA in the mode of intercalation with the intrinsic binding constant of 1.07 × 104 M?1.
Content Type Journal Article
Pages 1-10
DOI 10.1007/s10904-012-9672-1
Authors
Fang-Hong He, Marine Drug & Food Institute, Ocean University of China, Qingdao, 266003 People’s Republic of China
Man Jiang, Marine Drug & Food Institute, Ocean University of China, Qingdao, 266003 People’s Republic of China
Yan-Tuan Li, Marine Drug & Food Institute, Ocean University of China, Qingdao, 266003 People’s Republic of China
Zhi-Yong Wu, Marine Drug & Food Institute, Ocean University of China, Qingdao, 266003 People’s Republic of China
Cui-Wei Yan, College of Marine Life Science, Ocean University of China, Qingdao, 266003 People’s Republic of China
This work concerns the preparation of novel optically active nanocomposite materials derived from Cloisite Na+ clay, which has been functionalized by protonated l-methionine amino acid as a swelling agent for sufficient compatibilization with the poly(amide-imide) (PAI) matrix. The polymer
chains were formed from the polycondensation reaction of N,N?-(pyromellitoyl)-bis-phenylalanine diacid chloride with 4,4?-diaminodiphenylether. Interaction between the two phases was
established by modifying the PAI chains with amine end groups and free acid groups of the organoclay (OC). The effect of OC
dispersion and the interaction between OC and PAI chains on the properties of resulting bionanocomposite material was studied
using Fourier transform infrared spectroscopy, X-ray diffraction (XRD), transmission electron microscopy, field emission scanning
electron microscopy and thermogravimetric analysis techniques. The XRD pattern and morphological investigation revealed the
formation of intercalated and exfoliated OC platelets in the matrix. Because of the existence of naturally occurring amino
acids as biological chiral resources, it is predictable that these materials may be potentially biodegradable and biocompatible.
Content Type Journal Article
Pages 1-9
DOI 10.1007/s10904-012-9673-0
Authors
Shadpour Mallakpour, Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, 84156-83111 Isfahan, Islamic Republic of Iran
Mohammad Dinari, Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, 84156-83111 Isfahan, Islamic Republic of Iran
Two new cadmium coordination polymers have been synthesized with composition {[Cd2(tma)(atz)(H2O)]·(H2O)}n (1) (tmaH3 = benzene-1,3,5-tricarboxylicacid, atzH = 5-aminotetrazole) and [Cd(isoor)2(H2O)2] (2) (isoorH = isoorotic acid). X-ray single crystal structure analysis reveals that complex 1 is 3D coordination polymer. However 2 is mononuclear and turned 3D via hydrogen bonding. Thermogravimetric and luminescence characterization of the complexes were
done.
Graphical Abstract
Two new 3D coordination polymers of cadmium have been synthesized by using benzene-1,3,5-tricarboxylicacid, 5-aminotetrazole
and isoorotic acid. Both the complexes are characterized by X-ray single crystal structure, thermal and photoluminescence
study.
Content Type Journal Article
Pages 1-10
DOI 10.1007/s10904-012-9676-x
Authors
Durga Sankar Chowdhuri, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Madhusudan Bera, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Abhinandan Rana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Debdoot Hazari, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Swapan Kumar Jana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
Ennio Zangrando, Dipartimento di Scienze Chimiche, University of Trieste, 34127 Trieste, Italy
Sudipta Dalai, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India
The current cancer chemotherapy often results in high toxicity, drug resistance and some other side effects. Multidrug chemotherapy
has been found to reduce the side effects associated with the currently used chemotherapy. In this research, we have demonstrated
the polymer-drug co-conjugation by incorporating two bioactive agents that is, curcumin and an analogue of ferrocene (both
are anticancer agents) to a polymer by a hydrazone linker. The conjugates prepared were characterized by NMR spectroscopy.
Content Type Journal Article
Pages 1-6
DOI 10.1007/s10904-012-9670-3
Authors
B. D. Nkazi, School of Chemistry, University of the Witwatersrand, Johannesburg, Wits, 2050 South Africa
E. W. Neuse, School of Chemistry, University of the Witwatersrand, Johannesburg, Wits, 2050 South Africa
B. A. Aderibigbe, School of Chemistry, University of the Witwatersrand, Johannesburg, Wits, 2050 South Africa
A new coordination polymer of lead(II) nitrate complexes with bridging trans-1,2-bis(4-pyridyl)ethene (bpe) ligand, [Pb(µ-NO3)2(bpe)(MeOH)]n (1), has been synthesized and characterized by elemental analysis, FT-IR, 1H, 13C-NMR, thermal analysis and single crystal X-ray diffraction. In compound 1, lead(II) ions are bridged by nitrate ligands forming linear chains, which are also further coordinated by neutral bpe and
methanol ligands into a two-dimensional polymeric chain. This polymeric precursor has been used to prepare PbO nano-particles
using two different method. The prepared lead(II) oxide nano-structure was characterized by scanning electron microscopy and
X-ray powder diffraction.
Content Type Journal Article
Pages 1-6
DOI 10.1007/s10904-012-9668-x
Authors
Lida Hashemi, Department of Chemistry, School of Sciences, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, Islamic Republic of Iran
Alireza Aslani, Department of Chemistry, School of Sciences, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, Islamic Republic of Iran
Ali Morsali, Department of Chemistry, School of Sciences, Tarbiat Modares University, P.O. Box 14155-4838, Tehran, Islamic Republic of Iran
To study the ion exchange kinetics of heavy metal ions on the organic–inorganic composite cation exchanger poly-o-toluidine Zr(IV) tungstate, Nernst–Planck was computer simulated. Simulated numerical results for counter ions (Cu, Zn, Cd
and Pb) of equal valence and four different ionic mobilities are presented to understand the ionic diffusion process. These
results are based on the fractional attainment of equilibrium U(?), of the counter ions under study. The forward (M2+–H+) and reverse (H+–M2+) ion exchange processes are justified as the particle diffusion phenomenon. The self-diffusion coefficient (Do), energy of activation (Ea), and entropy of activation (∆S*) have also been estimated to understand the ion exchange process occurring over the surface of this cation exchanger and
indicated that the ion exchange process is feasible and spontaneous. It is concluded that the difference in activation energies
and entropy of activation may facilitate the separation of metal ions. The regeneration capability of this cation exchanger
was also explained.
Content Type Journal Article
Pages 1-8
DOI 10.1007/s10904-012-9667-y
Authors
Muhammad Talha, Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia
Mu. Naushad, Department of Chemistry, College of Science, King Saud University, Building-5, Riyadh, Saudi Arabia
This study investigated the potential use of a biologic polymer Lycopodium clavatum spores (Sporopollenin) for removal of
vanadium ions (V(IV)) from aqueous solution. Three Schiff base derivative compounds immobilized sporopollenin were prepared
and characterized. Immobilized sporopollenin was characterized via a scanning electron microscope, elemental analysis, infrared
spectroscopy and thermal analysis techniques. The sorption capacities of the immobilized surfaces toward V(IV) ions were investigated
by batch sorption experiments. V(IV) concentration, initial pH and the temperature effects were studied. The isotherm data
of V(IV) ions were correlated reasonably well both Langmuir, Freundlich sorption isotherm. The thermodynamic studies showed
that the V(IV) sorption onto immobilized sporopollenin derivatives is a spontaneous, endothermic and a chemical reaction.
Content Type Journal Article
Pages 1-8
DOI 10.1007/s10904-011-9646-8
Authors
Nuriye Kocak, Department of Science Education, Faculty of Education, Selcuk University, 42090 Konya, Turkey
Mustafa Sahin, Department of Chemistry, Faculty of Science, Selcuk University, 42075 Konya, Turkey
Ilkay H?lal Gubbuk, Department of Chemistry, Faculty of Science, Selcuk University, 42075 Konya, Turkey
Three homogeneous Cu(II), Co(II) and Ni(II) complexes of a Schiff base ligand and their heterogeneous complexes supported
on poly(4-aminostyrene) were prepared and characterized by using elemental analysis, fourier transform infrared spectroscopy,
UV–Vis diffuse reflectance spectroscopy, thermogravimetric analysis and scanning electron microscopy. The catalytic performance
of both homogeneous and heterogeneous complexes was evaluated in the liquid phase oxidation of cyclohexene, styrene and trans-stilbene in acetonitrile with tert-butylhydroperoxide or hydrogen peroxide as the oxidant. All types of catalyst were active in oxidation; and, the complexes
produce allylic oxidation products in all cases. Immobilized complexes are slightly more active than their homogeneous complexes.
The polymer-supported Cu(II) complex shows a higher catalytic activity than the other metal species. The activities of the
immobilized catalysts remained nearly the same after five cycles, suggesting the true heterogeneous nature of the catalyst.
Content Type Journal Article
Pages 1-14
DOI 10.1007/s10904-012-9666-z
Authors
S. M. Islam, Department of Chemistry, University of Kalyani, Kalyani, Nadia, 741235 West Bengal, India
Anupam Singha Roy, Department of Chemistry, University of Kalyani, Kalyani, Nadia, 741235 West Bengal, India
Paramita Mondal, Department of Chemistry, University of Kalyani, Kalyani, Nadia, 741235 West Bengal, India
Noor Salam, Department of Chemistry, University of Kalyani, Kalyani, Nadia, 741235 West Bengal, India
This paper is a review the polyoxometalate-based composite materials, including polyoxometalate incorporated Langmuir and
Langmuir–Blodgett, layer-by-layer multilayers and novel honeycomb films, self-assembly structures of modified polyoxometalate
complexes (e.g., onion-like structures, new inorganic–organic–inorganic vesicles, thermotropic and lyotropic liquid crystalline
structures, gels), and amino acid- and protein-polyoxometalate nanorods and nanoparticles. Polyoxometalate-embedded layer-by-layer
multilayer films show electrocatalytic or photochemical activity; and, novel photoluminescent honeycomb films templated by
microwater droplets are reviewed. Inorganic–organic–inorganic hybrid vesicles display the potential as nano-switches. In addition,
amino acid- and protein-polyoxometalate composite nanostructures indicate potential antimicrobial applications. Therefore,
the polyoxometalate-based composite materials have promising applications in electrochemistry, photochemistry and biomedicine.
Content Type Journal Article
Category Review
Pages 301-306
DOI 10.1007/s10904-012-9665-0
Authors
Dawei Fan, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 People’s Republic of China
Jingcheng Hao, Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, Shandong University, Jinan, 250100 People’s Republic of China
Qin Wei, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022 People’s Republic of China
Two novel cyano-bridged Ni2+ and Cu2+ compounds, {[M2+(hydeten)2(?-CN)2Ni(CN)2]n, M2+ = Ni2+ (c1) and Cu2+ (c2), N-(2-hydroxyethyl)-ethylenediamine (hydeten), were prepared and characterized by elemental analysis, IR spectroscopy and thermoanalytical measurements. The one-dimensional
polymeric structure of c2, which was determined by X-ray diffraction techniques, was formed with a 2,2-TT-type chain, –Cu(hydeten)2-NC-Ni(CN)2-CN-Cu(hydeten)2-, linkages. Also, while the EPR spectra and magnetic properties of complexes c1 and c2 with [Ni(hydeten)2Pd(CN)4] (c3) and [Cu(hydeten)2Pd(CN)4] (c4) [Karada?, Z Kristallogr 222:39, 2007] were investigated, the catalytic activity of c3 and c4 was studied. The EPR spectra of c2 and c4 showed that Cu2+ was located in tetragonal distorted octahedral sites (D4h) and the ground state of the paramagnetic electron was
dx2 - y2
. The magnetic behavior exhibited weak antiferromagnetic interactions in all the complexes. Also, the catalytic properties
of c3 and c4, which were assigned with Suzuki and Heck coupling reactions, showed that they did not have catalytic effects.
Content Type Journal Article
Pages 369-378
DOI 10.1007/s10904-011-9623-2
Authors
Ahmet Karada?, Department of Chemistry, College of Art and Science, Gaziosmanpa?a University, 60400 Tokat, Turkey
Ay?egül ?enocak, Department of Chemistry, College of Art and Science, Gaziosmanpa?a University, 60400 Tokat, Turkey
Yusuf Yerli, Department of Physics, Gebze Institute of Technology, 41400 Kocaeli, Turkey
Ertan ?ahin, Department of Chemistry, College of Science, Atatürk University, 25240 Erzurum, Turkey
Ramazan Topkaya, Department of Physics, Gebze Institute of Technology, 41400 Kocaeli, Turkey
Reaction of thiodiglycolic acid and silver nitrate under ultrasonic condition forms a 3D supramolecular framework of silver
with composition [Ag2(tdga)]n (1). X-ray single crystal structure analysis reveals repetition of paddle wheel units in the network. A weak Ag–Ag bond is present
in the complex. A new ?8-coordination mode of the thiodiglycolate ligand is identified. Photoluminescence and thermal characterization of the complex
was examined.
Graphical Abstract
Novel 3D silver coordination polymer with Ag–Ag bond is synthesized using thiodiglycolic acid ligand and characterized by
X-ray diffraction, IR, photoluminescence and TG analysis. The ligand displays a unique type of coordination.
Content Type Journal Article
Category Communication
Pages 1-6
DOI 10.1007/s10904-012-9664-1
Authors
Madhusudan Bera, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
Abhinandan Rana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
Durga Sankar Chowdhuri, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
Debdoot Hazari, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
Swapan Kumar Jana, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
Horst Puschmann, Department of Chemistry, Durham University, Durham, DH1 3LE UK
Sudipta Dalai, Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721102 West Bengal, India
The present work reports the synthesis and characterization of nanostructured poly (o-toluidine) (POT) reinforced epoxy-siloxane (ES) composite resins. The structural elucidation was carried out using FT-IR
and UV–visible spectrometry. The FT-IR analysis confirmed the interaction between NH group of the POT and the OH group of
ES via strong hydrogen bonding. The UV–visible spectra of POT/ES composites revealed a blue shift of 100 nm in the polaronic
transition peak observed at 600 nm in pristine POT, which was attributed to the restriction in the delocalization of polarons
in the POT chains due to electrostatic interaction via hydrogen bonding. The nanosize of POT and its dispersion in the ES
matrix was confirmed by X-ray diffraction (XRD) and transmission electron microscopy studies. The particle size was found
from 15–35 nm. The morphological studies confirmed the formation of a nanocomposite where POT appeared to act as reinforcing
agent in the ES matrix. XRD showed the semi-crystalline nature of POT/ES nanocomposites. The conductivities of POT and its
nanocomposites were 10?3–10?4 S/cm at 30 °C. The thermal stability increased with an increase in the loading of POT in ES. The nanocomposites revealed
good physico-chemical and physico-mechanical characteristics, which suggests their potential application as corrosion protective
coatings.
Content Type Journal Article
Pages 662-670
DOI 10.1007/s10904-012-9661-4
Authors
Sharif Ahmad, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025 India
Ufana Riaz, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025 India
Mohd Kashif, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025 India
Mohd Shoeb Khan, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025 India
In this study, the nanocomposite films of polyvinylidene fluoride/copper nanoparticles were prepared by mixing of copper nanoparticles
in a solution of dimethylformamide and polyvinylidene fluoride. The prepared nanocomposites were investigated by fourier transform
infrared spectroscopy and X-ray diffraction techniques, showed an obvious ?- to ?-phase transformation compared to pure PVDF. Scanning electron microscope micrographs showed spherulitic crystal structure
of PVDF. The spherulitic morphology of the pure PVDF is maintained for the PVDF nanocomposites; the size of the spherulites
decreased by increasing weight fraction of copper nanoparticles. The optical band gap values deduced from the UV–Visible absorption
spectra were found to reduce from 4.77 eV in pure PVDF to 3.2 eV after embedding 1 wt% of copper nanoparticles. The surface
resistivity values were decreased with increasing copper nanoparticles content. Thermal stability of the nanocomposites was
studied by thermogravimetric analysis (TGA). TGA curves showed that nanocomposite films have higher resistance to thermal
degradation compared to pure PVDF.
Content Type Journal Article
Pages 1-8
DOI 10.1007/s10904-012-9660-5
Authors
B. Jaleh, Department of Physics, Bu Ali Sina University, Hamedan, Iran
P. Fakhri, Department of Physics, Bu Ali Sina University, Hamedan, Iran
M. Noroozi, Faculty of Chemistry, Bu Ali Sina University, Hamedan, Iran
N. Muensit, Department of Physics, NANOTEC Center of Excellence at Prince of Songkla University, Songkla, Thailand
Core–shell structured Fe3O4/SiO2 nanoparticles (NPs) sized 40–50 nm with a narrow size distribution have been synthesized by a mechanical stirring and ultrasonication
assisted Stöber method at the room temperature. It is shown that the combination of the ultrasonication and mechanical stirring
during the preparation process benefits the formation of the well-dispersed NPs. The Fe3O4/SiO2 core–shell microstructure is identified with X-ray diffraction and transmission electron microscopy measurements and such
NPs exhibit superparamagnetism.
Content Type Journal Article
Pages 311-315
DOI 10.1007/s10904-011-9609-0
Authors
Xuejiao Sun, School of Material Science and Engineering, University of Jinan, Jinan, 250022 China
Futian Liu, School of Material Science and Engineering, University of Jinan, Jinan, 250022 China
Li Sun, School of Material Science and Engineering, University of Jinan, Jinan, 250022 China
Qun Wang, School of Material Science and Engineering, University of Jinan, Jinan, 250022 China
Yongling Ding, School of Material Science and Engineering, University of Jinan, Jinan, 250022 China
The aim of this work is to report the optical and structural properties of ZnS nanoparticles in mesoporous matrix. The samples
were obtained by sulfidation of the Zn2+ ion-exchange mesopore in a Na2S solution at room temperature. The final product (ZnS/MCM-41) was characterized by X-ray diffraction (XRD) pattern, transmission
electron microscopy, scanning electron microscopy (SEM), infrared spectrometry and UV–Vis spectroscopy. Its crystalline structure
and morphology was studied by XRD and SEM. Exciton absorption peaks at higher energy than the fundamental absorption edge
of bulk ZnS indicates quantum confinement effects in nanoparticles as a consequence of their small size.
Content Type Journal Article
Pages 1-5
DOI 10.1007/s10904-012-9656-1
Authors
Sh. Sohrabnezhad, Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Rasht, Iran
Sc2Si2O7-based environmental barrier coating (EBC) was prepared on 2D C/SiC composites by different liquid phase processes. Single
Sc2Si2O7 coating was brushed with sol and slurry. The multi-layer coating, which consisted of BSAS (Ba0.25Sr0.75Al2Si2O8, B) as bond coat, BSAS + Sc2Si2O7 (BS) as interlayer and Sc2Si2O7 (S) as top coat, was painted with slurry and modified slurry. The slurry process was modified using amorphous instead of
crystallized powders as raw materials derived from the sol–gel method. Modification mechanisms were proposed and characterized
by weight losses of BSAS and Sc2Si2O7 dry gel from thermogravimetric analysis and their sintering shrinkage ratios from coefficient of thermal expansion tests.
The microstructure of the prepared coating was observed using scanning electron microscopy. The phase composition was detected
by X-ray diffraction. The results showed that the S/BS/B coating with 30 ?m thickness, which was prepared by the modified
slurry, possessed excellent adhesion to the substrate and the best compactness among the above coatings. Higher activity,
lower sintering energy barrier and tiny sintering shrinkage of S and B amorphous powders are mainly responsible for the performance
enhancement.
Content Type Journal Article
Pages 1-7
DOI 10.1007/s10904-012-9659-y
Authors
Zhiliang Hong, National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an, 710072 China
Laifei Cheng, National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an, 710072 China
Juanli Deng, National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an, 710072 China
Linjing Lu, National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an, 710072 China
Yiguang Wang, National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an, 710072 China
A novel 2D ? 2D parallel interpenetrated coordination polymer [Zn2(pdoa)2(bpp)2(H2O)]·4H2O (1) [H2pdoa = 2,2?-(1,3-phenylenedioxy)bis(acetate), bpp = 1,3-bis(4-pyridyl)propane], has been synthesized by hydrothermal reaction
of Zn(Ac)2·2H2O, bpp and H2pdoa, and characterized by elemental analysis, IR spectra, PXRD, and single-crystal X-ray diffraction. The structure determination
reveals that 1 features a 2D parallel interpenetrated 44-sql net generated by 2-crossing [2]-catenane motif, and pairs of interpenetrating 2D sheets show the same handedness. The overall
structure, however, is achiral—in each layer of doubly interpenetrating nets, the two individual nets have the opposite handedness
to the corresponding nets in the adjoining layers. Moreover, the thermal stabilities and photoluminescence properties of 1 were also discussed.
Graphical Abstract
A novel 2D two-fold interpenetrated coordination polymer, [Zn2(pdoa)2(bpp)2(H2O)]·4H2O (1) has been synthesized and characterized by elemental analysis, IR spectra, PXRD, and single-crystal X-ray diffraction. Furthermore,
thermogravimetric analysis and the photoluminescence properties of complex 1 were also studied
.
Content Type Journal Article
Pages 1-7
DOI 10.1007/s10904-012-9657-0
Authors
Cai Li, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
Dong-Sheng Li, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
Jun Zhao, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
Yi-Qiang Mu, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
Zi-Fan Fang, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
Ya-Pan Wu, College of Mechanical and Material Engineering, Research Institute of Materials, China Three Gorges University, Yichang, 443002 China
A novel octakis-2{[3-(trimethoxysilyl)propyl]thio}ethyl-octasilsesqioxane (POSS-M24) was synthesized by radical thiol-ene
addition of 3-mercaptopropyltrimethoxysilane, (MPTMS) to octavinyloctasilsesquioxane, (POSS-V8) in the presence of 2,2?azobisisobutyronitryl
under mild conditions (60 °C, toluene solution). Nano-building POSS units bearing both types of groups, 2-[3-(trimethoxysilyl)propylthio]-ethyl
and vinyl, pendant to the POSS-cage were obtained by partial addition of MPTMS to the vinyl functions. Finally the thiol-ene
addition of MPTMS to 2,4,6-trivinyl-2,4,6-trimethylcyclotrisiloxane (V3) and 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (V4) were explored. The structures of the thiol-ene addition products were confirmed by 29Si NMR and mass Spectroscopy.
Content Type Journal Article
Pages 588-594
DOI 10.1007/s10904-012-9652-5
Authors
K. Rózga-Wijas, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 ?ód?, Poland
J. Chojnowski, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 ?ód?, Poland
A novel Pb(II) complex, {[Pb2(tpmba)2(NO3)4]·MeOH}n (1), was obtained by the reaction of a tripodal ligand, N,N?,N?-tris(pyrid-3-ylmethyl)-1,3,5-benzenetricarboxamide (tpmba), with Pb(NO3)2. The structure of complex was determined by X-ray crystallography. The results of structural analysis of the complex reveal
that 1 is a M2L2 cage-like with a methanol molecule beside the cage. An entirely different structure and topology between 1 and similar complexes indicate that the nature of organic ligands affects the structure of assemblies. The results indicate
that the framework of this complex is predominated by the nature of the organic ligand, anions, solvent and geometric need
of the metal ions. It was found that the coordination number of PbII ions is eight, (PbN3O5) has a stereo-chemically active electron lone pair and the coordination sphere is hemi-directed. PbO nanoparticles are obtained
by thermolysis of 1 at 180 °C with oleic acid as a surfactant. Scanning electron microscopy shows that the size of the PbO particles is ~30 nm.
Content Type Journal Article
Category Communication
Pages 1-7
DOI 10.1007/s10904-012-9658-z
Authors
Gholam Hossein Shahverdizadeh, Department of Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, P.O. Box 1655, Tabriz, Iran
Fateme Hakimi, Department of Chemistry, University of Zanjan, Zanjan, Iran
Babak Mirtamizdoust, Department of Chemistry, University of Zanjan, Zanjan, Iran
Aliakbar Soudi, Department of Chemistry, University of Zanjan, Zanjan, Iran
Pejman Hojati-Talemi, Mawson Institute, University of South Australia, Mawson Lakes SA, 5095 Australia
For the first time the flower-like cadmium(II) coordination compound, [Cd(2,2’-bpy)(ftfa)2]n (1), (2,2’-bpy = 2,2’-bipyridine; ftfa = furoyltrifluoroacetonate) is synthesized sonochemically. The new nano-structure was
characterized by scanning electron microscopy, X-ray powder diffraction, elemental analyses and IR spectroscopy. Single crystalline
material is obtained using a heat gradient applied to a solution of the reagents. The thermal stability of compound is studied
by thermogravimetric and differential thermal analyses. After calcinations of nano-sized 1 at 400 °C, pure phase nano-sized Cd(II) oxide was produced. The average size of the nanoparticles is estimated by the Scherrer
equation (diameter ? 25 nm). The morphology and size of the prepared Cd(II)O samples are examined by SEM.
Content Type Journal Article
Category Communication
Pages 549-553
DOI 10.1007/s10904-012-9654-3
Authors
Younes Hanifehpour, School of Mechanical Engineering, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 South Korea
Babak Mirtamizdoust, School of Mechanical Engineering, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 South Korea
Sang Woo Joo, School of Mechanical Engineering, WCU Nano Research Center, Yeungnam University, Gyongsan, 712-749 South Korea
Silver particles with various morphologies were prepared by a facile synthesis via the reduction of silver ions in an ethylene
glycol solution with poly(vinyl pyrrolidone) (PVP) and trace amounts of sodium chloride. Preparative conditions such as reaction
temperature (from 120 to 160 °C), time, and the concentration of starting materials were optimized for the purpose of controlling
the morphology of Ag particles. Scanning electron microscopy indicated Ag particles with various morphologies such as rod,
cubic, and spherical. The creation of various morphologies was ascribed to the select adsorption ability of PVP and the erosion
behavior of the chloride ion. Because of the morphology dependence of the Ag particles on the preparative conditions, this
strategy provided a platform for controlling the morphologies of metallic particles.
Content Type Journal Article
Category Communication
Pages 514-518
DOI 10.1007/s10904-012-9651-6
Authors
Yulan Zhang, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Ruili Zhang, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Ning Liu, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Zhimin Yuan, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Jie Yang, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Yuanna Zhu, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Yongqiang Cao, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Aiyu Zhang, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Ping Yang, School of Material Science and Engineering, University of Jinan, 250022 Jinan, People’s Republic of China
Environmentally friendly polysiloxane and clay/polysiloxane composite coatings were synthesized on aerospace-grade aluminum
alloy AA2024-T3 substrates from mildly acidified aqueous solution. The polysiloxane coatings were synthesized by acid-catalyzed
hydrolysis and condensation of organosilane coupling agents such as glycidoxypropyltrimethoxysilane (GPTMS) and tetramethoxysilane
(TMOS) followed by solution drop-casting onto the substrate to form self assembled nanoparticles, coating. The epoxy polysiloxane
coating formed by condensation reaction of hydrolyzed TMOS and GPTMS was subsequently cured with aminosilane coupling agent
to form cross-linked polysiloxane coating. Clay/polysiloxane coating was formed by dispersing about 0.1–0.3wt% of clay in
the hydrolyzed TMOS/GPTMS solution followed by solution casting and the resulting clay/polysiloxane composite coating was
subsequently cured with aminosilane coupling agent. The structure and composition of organosilane coupling agents and hybrid
polysiloxane coatings were determined by reflection–absorption infrared spectroscopy (RAIR) and X-ray diffraction spectrometry
(XRD). The hydrolysis, condensation and curing reactions of TMOS and the organosilane coupling agents were studied by analyzing
thin films cast on aluminum alloy substrate after a predetermined reaction time by using RAIR. The XRD results show that the
resulting polysiloxanes are semi-crystalline polymers. Wide angle XRD analysis indicated that clay dispersed in clay/polysiloxane
composite coating is either highly intercalated or partially exfoliated. This inference was drawn from the disappearance of
d001 diffraction peak for clay from the XRD spectrum of clay/polysiloxane coatings cured at 100 °C for 2.5 h.
Content Type Journal Article
Pages 595-603
DOI 10.1007/s10904-012-9653-4
Authors
J. O. Iroh, Materials Engineering Program, School of Aerospace System, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH 45221-0070, USA
Deepika Rajamani, Materials Engineering Program, School of Aerospace System, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH 45221-0070, USA
A new silver(I) coordination polymer, [Ag(Hcpa)]n (1), was synthesized using a flexible asymmetric biscarboxylate ligand, (4-carboxymethoxy-phenyl)-acetic acid (H2cpa), and Ag(NO3). The acetate group is monodentate and links a Ag(I)-atom. The oxyacatate group is tetradentate and connects three Ag(I)-atoms.
Each Hcpa ligand exhibits a novel pentadentate coordination mode bridging four Ag(I) ions and is 4-connected. Each Ag(I) is
coordinated by four Hcpa and extend to a novel (4,4)-connected two-dimensional network that contains one-dimensional channels.
1 reveals the blue emission maximum at 446 nm in the solid state at room temperature. The X-ray power diffractions and TGA
of 1 are presented.
Content Type Journal Article
Category Communication
Pages 1-5
DOI 10.1007/s10904-012-9655-2
Authors
Hai-Yan Li, Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 People’s Republic of China
De-Yun Yuan, Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 People’s Republic of China
Xin Qian, Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 People’s Republic of China
Bao-Long Li, Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 People’s Republic of China
A one-dimensional Cd(II) coordination polymer containing 2-pyridinecarboxylate (2-pyc?) and iodide anions [Cd(?-2-pyc)(?-I)]n(1), is synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and X-ray crystallography. The
single-crystal X-ray data show that the coordination number for the Cd2+ ion is five. The thermal stability of 1 was studied by thermogravimetry and differential thermal analyzes. Cd(II)O nanoparticles were prepared by direct calcination
of 1 at different temperatures. The Cd(II)O nanoparticles were characterized by X-ray powder diffraction and scanning electron
microscopy. The results show that the morphology of the Cd(II)O nanoparticles is dependent upon the thermolysis temperature.
Content Type Journal Article
Category Communication
Pages 543-548
DOI 10.1007/s10904-012-9650-7
Authors
Mahmood Payehghadr, Department of Chemistry, Payame Noor University, Karaj, Islamic Republic of Iran
Vahid Safarifard, Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran
Maryam Ramazani, Department of Chemistry, Payame Noor University, Abhar, Zanjan, Islamic Republic of Iran
Ali Morsali, Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran
Three new isostructural 3D lanthanide MOFs (Ln(HBPTC)(H2O)) (Ln = Tb (1), Pr (2), Nd (3); H4BPTC = 3,3?,4,4?-biphenyltetracarboxylic acid) have been synthesized under hydrothermal conditions using imidazole as a structure-directing
agent, and characterized by elemental analyses, IR, thermogravimetric analyses (TGA) and powder X-ray diffraction (PXRD) analyses.
Topologically, compounds 1–3 demonstrate an intriguing 3D (6, 6)-connected network with the Schläfli symbol of (410·65)(49·66); and if the dinuclear (Ln2) clusters are considered as the single 8-connected nodes, they can be described as a scarcely reported (4, 8)-connected alb
net constructed from two intertwining sqp-4 nets. TGA and PXRD analyses reveal that compounds 1–3 exhibit high thermal stability, at least being stable up to 410 °C. Furthermore, the luminescence studies were performed
on compound 1 and its dehydrated phase in the solid state at room temperature. The results demonstrate that compound 1 displays intense green emission, implying its potential application as fluorescence material. And the luminescence of 1 is quenched when removing the coordinated water molecules.
Content Type Journal Article
Pages 507-513
DOI 10.1007/s10904-011-9649-5
Authors
Rong Yuan, Department of Chemistry, Nanchang University, Nanchang, 330031 People’s Republic of China
Chao Chen, Department of Chemistry, Nanchang University, Nanchang, 330031 People’s Republic of China
Ning Zhang, Department of Chemistry, Nanchang University, Nanchang, 330031 People’s Republic of China
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