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Polymeric Complexes (polymeric + complex)
Selected AbstractsCrystal structure of a ternary mononuclear copper (II) complex: 4-chloro-3-methyl-6[(N-2-picolyl)-1,-iminomethyl]phenolato copper(II)perchlorateCRYSTAL RESEARCH AND TECHNOLOGY, Issue 5 2006S. M. Malathy Sony Abstract The complex crystallizes in monoclinic space group P21/n with unit cell parameters a = 7.295(4), b = 19.627(5), c = 12.770(4) Å, , = 101.25(4)º, V = 1793.2(12) Å3, Z = 4, , = 1.684 Mg/m3 at T = 293(2)K. The structure was solved by Patterson method and refined by full-matrix least-squares procedures to final R = 0.0387 using 2906 observed reflections. The asymmetric unit of the complex contains a mononuclear tridentate ligand, a perchlorate group and a methanol molecule. The compound crystallizes as parallel layers of polymeric complex bridged through perchloarate groups. The molecular CuN2OO,O,,2 chromophore involves an elongated rhombic octahedral structure and the Cu-ligand bond shows greater disparity. The five-membered chelate ring and the pyridine ring lie in the same plane while the six membered chelate ring assumes sofa conformation. A strong O-H,O inter molecular interaction plays a key role in the formation of dimer along b-axis. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Synthesis and Characterisation of a New Cu(O2CNAllyl2)2 Carbamato Complex and an Unusual Polymeric CuI Complex [CuI4Cl4(NHAllyl2)4]n: New Insights into Metal Carbamato ChemistryEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 35 2009Alberto Albinati Abstract Transition-metal N,N -dialkylcarbamato complexes represent an interesting class of compounds that can be conveniently used as precursors for the controlled formation of inorganic compounds, typically oxides. They can also be used as convenient precursors for chemical grafting of metal oxides on oxide surfaces as well as for the synthesis of inorganic,organic hybrid materials. In this last case, the presence of double bonds on the complex would enable its covalent embedding into a polymer matrix through reaction with suitable monomers. To this aim, we addressed the synthesis of an allyl-functionalised copper carbamato complex. During the synthesis of the N,N -diallylcarbamato complex Cu(O2CNAllyl2)2 (Cu1), the formation of the crystalline and unusual polymeric CuI complex [CuI4Cl4(NHAllyl2)4]n (Cu2) was observed. The new compound was characterised by X-ray single crystal diffraction and FTIR, 1H and 13C NMR spectroscopic analysis. In an attempt to investigate the redox mechanism and the equilibria leading to the formation of the observed unusual CuI polymeric complex, gas chromatography coupled with mass spectrometry (GC,MS) experiments were carried out, which allowed us to identify 3,4-dimethylpyrrole as the oxidation product of the reaction, leading to the reduction of CuII to CuI.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] A Novel 3-D Self-Penetrating Topological Network Assembled by Mixed Bridging LigandsEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 11 2004Xing Li Abstract The assembly of 5-sulfoisophthalic acid (H3sipa) and 4,4,-bipyridine (bpy) with Cd2+ ions gave rise to a new polymeric complex {[Cd3(sipa)2(bpy)4(H2O)2]·3H2O}n (1). X-ray diffraction analysis reveals that complex 1 has a 3-D self-penetrating network formed by the interlocking and interweaving of two types of one-dimensional chains comprising two kinds of Cd4(sipa)4 and Cd4(bpy)4 units, respectively. The sipa3, ligand serves as the connector and the Cd2+ ion as the node. Thermogravimetric analysis (TGA) and the luminescence property of 1 are discussed. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) [source] Nickel Complexes with N2O Donor Ligands: Syntheses, Structures, Catalysis and Magnetic StudiesEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 32 2007Jishnunil Chakraborty Abstract Two new terephthalato-bridged tetranuclear polymeric NiII complexes, namely [Ni4L41(,-tp-,4 -O)(H2O)2(,-tp-,2 -O)]·2C2H5OH·CH3OH·3H2O (1) and [Ni4L42(,-tp-,4 -O)(H2O)2(,-tp-,2 -O)]·3H2O (2) [L1 = N -(3-aminopropyl)-5-bromosalicylaldimine and L2 = N -(3-aminopropyl)salicylaldimine], are reported along with the syntheses and structures of the dicyanoargentate-bridged polymeric complexes [Ni(L1)(H2O){Ag(CN)2}], (3) and [Ni(L3)(MeOH){Ag(CN)2}], (4) [L3 = N -(3-amino-2,2-dimethylpropyl)-5-bromosalicylaldimine]. All four complexes are found to be effective heterogeneous catalysts for the epoxidation of alkenes such as styrene, ,-methylstyrene and cyclohexene in the presence of tert -butyl hydroperoxide. The variable-temperature magnetic susceptibility measurements (300,2 K) of complex 1 show a fair degree of antiferromagnetic coupling between the NiII centers.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source] Self-Assembly of 1D to 3D Cadmium Complexes: Structural Characterization and PropertiesEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 15 2005Xing Li Abstract Self-assembly reactions of 5-sulfoisophthalic monosodium salt (NaH2sipa), Cd(NO3)2·4H2O and 2,2'-bipyridine (or 4,4'-bipyridine) under hydrothermal condition give rise to four polymeric complexes, namely {[Cd3(sipa)2(2,2'-bpy)4(H2O)2]·6H2O}n (1), {[Cd(sipa)(H-4,4'-bpy)(H2O)]·2H2O}n (2); {[Cd2(sipa)(4,4'-bpy)3(H2O)3]·[Cd(sipa)(4,4'-bpy)(H2O)]·8H2O}n (3),and {[Cd3(sipa)2(4,4'-bpy)4(H2O)2]·3H2O}n (4), respectively. X-ray diffraction analyses reveal that complex 1 possesses a 1D rail-like chain structure, 2 is a 1D double chain, 3 has a 2D network consisting of an independent [Cd2(sipa)(4,4'-bpy)3(H2O)3]nn+ cationic layer and a [Cd(sipa)(4,4'-bpy)(H2O)]nn, anionic layer, and 4 is a novel 3D self-penetrating network constructed from two mixed bridging ligands. Thermogravimetric analyses (TGA) and fluorescent measurements of complexes 1,4 have also been performed. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) [source] Polyphenylene Dendrimer-Templated In Situ Construction of Inorganic,Organic Hybrid Rice-Shaped ArchitecturesADVANCED FUNCTIONAL MATERIALS, Issue 1 2010Xiaoying Qi Abstract A novel dendrimer-templating method for the synthesis of CuO nanoparticles and the in situ construction of ordered inorganic,organic CuO,G2Td(COOH)16rice-shaped architectures (RSAs) with analogous monocrystalline structures are reported. The primary CuO nanoparticles are linked by the G2Td(COOH)16 dendrimer. This method provides a way to preserve the original properties of primary CuO nanoparticles in the ordered hybrid nanomaterials by using the 3D rigid polyphenylene dendrimer (G2Td(COOH)16) as a space isolation. The primary CuO nanoparticles with diameter of (6.3,±,0.4) nm are synthesized via four successive reaction steps starting from the rapid reduction of Cu(NO3)2 by using NaBH4 as reducer and G2Td(COOH)16 as surfactant. The obtained hybrid CuO,G2Td(COOH)16 RSA, formed in the last reaction step, possesses a crystal structure analogous to a monocrystal as observed by transmission electron microscopy(TEM). In particular, the formation process of the RSA is monitored by UV,vis, TEM, and X-ray diffraction. Small angle X-ray scattering and Fourier transform infrared spectroscopy are used to investigate the role of the dendrimer in the RSA formation process. The obtained results illuminate that Cu2+COO, coordination bonds play an indispensable role in bridging and dispersing the primary CuO nanoparticles to induce and maintain the hybrid RSA. More importantly, the RSA is retained through the Cu2+COO,coordination bonds even with HCl treatment, suggesting that the dendrimers and Cu2+ ions may form rice-shaped polymeric complexes which could template the assembly of CuO nanoparticles towards RSAs. This study highlights the feasibility and flexibility of employing the peculiar dendrimers to in-situ build up hybrid architectures which could further serve as templates, containers or nanoreactors for the synthesis of other nanomaterials. [source] Synthesis and magnetic properties of novel fully conjugated polymeric complexes containing 1,10-phenanthrolineJOURNAL OF APPLIED POLYMER SCIENCE, Issue 4 2008Renhua Zheng Abstract A novel fully conjugated polymer containing 1,10-phenanthroline (DAPcDOD) was first synthesized by the polycondensation of 2,7-dimethyl-2,4,6-octatriene-1,8-dial with 5,6-diamine-1,10-phenanthroline. Three polymeric complexes were first prepared by the reaction of DAPcDOD with NiSO4, CoCl2, and FeSO4, respectively. The structures of the polymer and the complexes were characterized by IR, 1H-NMR, and elemental analysis. The magnetic behaviors of these complexes were measured as a function of magnetic field strength (0,50 kOe) at 5 K and as a function of temperature (5,300 K) at a magnetic field strength of 30 kOe. The results show that DAPcDOD,Ni2+ and DAPcDOD,Co2+ were soft ferromagnets, whereas DAPcDOD,Fe2+ exhibited the features of an antiferromagnet. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source] Side-chain terpyridine polymers through atom transfer radical polymerization and their ruthenium complexesJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 20 2005Nikos P. Tzanetos Abstract Polymers containing side-chain terpyridine ligands of well-defined architectures and controllable molecular weights and molecular weight distributions are reported. These polymers were synthesized by the atom transfer radical polymerization (ATRP) of a newly synthesized terpyridine monomer with three functional initiators. The obtained polymers were characterized with 1H NMR and gel permeation chromatography techniques. The efficiency of the ATRP technique and the overall control of the molecular characteristics of the polymers were demonstrated by a kinetic study of the polymerization reaction. Subsequently, the ruthenium(III)/ruthenium(II) complexation chemistry was employed for the attachment of bis(dodecyloxy)-functionalized terpyridine moieties onto each side 2,2,:6,,2,-terpyridine unit of the main polymeric backbone. Thus, the grafting approach was successfully combined with the metal,ligand coordination chemistry for the preparation of highly soluble polymeric complexes. The resulting complexes were fully characterized by means of 1H NMR, gel permeation chromatography, and ultraviolet,visible spectroscopy. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 4838,4848, 2005 [source] Synthesis and Characterization of Supramolecular Polymeric Materials Containing Azopyridine UnitsMACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 22 2006Marta Millaruelo Abstract Summary: The synthesis and characterization of a series of supramolecular polymeric complexes formed by H-bonding interactions between benzoic acid and azopyridine derivatives are described. A series of polymeric networks have been synthesized using a polymethacrylate bearing benzoic acid units as side groups, and several polymers with azopyridine as H-acceptor side groups. Furthermore, low-molecular-weight pyridine derivatives have been used to prepare an homologous side-chain polymer, and a network with azopyridine as a non-covalent crosslinker. Special attention was paid to the thermal and mesomorphic properties of these materials, which were studied by DSC, POM, and XRD. Micrograph of the mesomorphic melt of a sample taken at 130,°C on cooling from the isotropic state. [source] Synthesis and magnetic properties of novel polymeric complexes containing bithiazole ringsPOLYMERS FOR ADVANCED TECHNOLOGIES, Issue 12 2007Weihong Lin Abstract A novel linear polymer (PFABT) containing bithiazole rings was synthesized by polycondensation of 2,2,-diamino-4,4,-bithiazole (DABT) and formaldehyde. The complexes of PFABT with two transition metal ions (Fe2+, Cu2+) were prepared for the first time. The polymer was determined through FT-IR, 1H-NMR and elemental analysis (EA), and the complexes were characterized by FT-IR. The magnetic behaviors of these complexes were measured as a function of magnetic field strength (0,50,kOe) at 4,K and as a function of temperature (4,300,K) under an applied magnetic field of 30,kOe. The results show that PFABT-Cu2+ is a ferromagnet while PFABT-Fe2+ is an anti-ferromagnet. Copyright © 2007 John Wiley & Sons, Ltd. [source] Powder study of poly[(,2 -2,2-dimethylpropane-1,3-diyl diisocyanide)-,2 -iodido-silver(I)]ACTA CRYSTALLOGRAPHICA SECTION C, Issue 3 2009Mwaffak Rukiah In order to explore the chemistry of the bidentate ligand 2,2-dimethylpropane-1,3-diyl diisocyanide and to investigate the effect of counter-ions on the polymeric structure of (2,2-dimethylpropane-1,3-diyl diisocyanide)silver(I) complexes, the title polymeric compound, [AgI(C7H10N2)]n, was synthesized by treatment of 2,2-dimethylpropane-1,3-diyl diisocyanide with AgI. X-ray powder diffraction studies show, as expected, a polymeric structure, similar to the very recently reported Cl, and NO3, analogues [AgX(C7H10N2)]n (X = Cl, or NO3,). In the title structure, the AgI centre is bridged to two adjacent AgI neighbours by bidentate 2,2-dimethylpropane-1,3-diyl diisocyanide ligands via the NC groups to form [Ag{CNCH2C(CH3)2CH2NC}]n chains. The iodide counter-ions crosslink the AgI centres of the chains to form a two-dimensional polymeric {[Ag{CNCH2C(CH3)2CH2NC}]I}n network. This study also shows that this bidentate ligand forms similar polymeric structures on treatment with AgX, regardless of the nature of the counter-ion X,, and also has a strong tendency to form polymeric complexes rather than dimeric or trimeric ones. [source] catena -Poly[[bis(,2 -4-methylbenzoato-,2O:O,)disilver(I)(Ag,Ag)]-,2 -di-2-pyridylamine-,2N2:N2,] and catena -poly[[(di-2-pyridylamine-,N2)(,2 -4-nitrobenzoato-,2O:O,)disilver(I)(Ag,Ag)]-,3 -4-nitrobenzoato-,3O:O,:O,]ACTA CRYSTALLOGRAPHICA SECTION C, Issue 1 2007Mamiko Odoko Both title compounds are polynuclear polymeric complexes with binuclear units. In the former compound, [Ag2(C8H7O2)2(C10H9N3)]n, the two AgI atoms display distorted square-planar coordinations. This compound contains a twofold axis and a crystallographic inversion centre, and di-2-pyridylamine (DPA) ligands crosslink adjacent binuclear units to form infinite polymeric chains. Crystal packing is stabilized by van der Waals interactions and partial ,,, stacking interactions between the chains. The latter compound, [Ag2(C7H4NO4)2(C10H9N3)]n, contains crystallographic inversion centres and the two AgI atoms exhibit two types of distorted square-pyramidal coordination. Ag,Ag argentophilic interactions and Ag,O crosslinking between adjacent binuclear units contribute to form infinite polymeric chains. Weak ,,, stacking interactions are observed in the polymer chain. Crystal packing is stabilized by C,H,O hydrogen bonds and by weak ,,, stacking interactions. [source] Formation of 1,D and 3,D Coordination Polymers in the Solid State Induced by Mechanochemical and Annealing Treatments: Bis(3-cyano-pentane-2,4-dionato) Metal ComplexesCHEMISTRY - A EUROPEAN JOURNAL, Issue 34 2008Jun Yoshida Abstract Bis(3-cyano-pentane-2,4-dionato) (CNacac) metal complex, [M(CNacac)2], which acts as both a metal-ion-like and a ligand-like building unit, forms supramolecular structures by self-assembly. Co-grinding of the metal acetates of MnII, CoII, NiII, CuII and ZnII with CNacacH formed a CNacac complex in all cases: mononuclear complex was formed in the cases of MnII, CuII and ZnII, whereas polymeric ones were formed in the cases of FeII, CoII and NiII. Subsequent annealing converted the mononuclear complexes of MnII, CuII and ZnII to their corresponding polymers as a result of dehydration of the mononuclear complexes. The resultant MnII, FeII, CoII, NiII and ZnII polymeric complexes had a common 3,D structure with high thermal stability. In the case of CuII, a 1,D polymer was obtained. The MnII, CuII and ZnII polymeric complexes returned to their original mononuclear complexes on exposure to water vapour but they reverted to the polymeric complexes by re-annealing. Co-grinding of metal chlorides with CNacacH and annealing of the mononuclear CNacac complexes prepared from solution reactions were also examined for comparison. [Mn(CNacac)2(H2O)2], [M(CNacac)2(H2O)] (M=CuII and ZnII) and [M(CNacac)2], (M=MnII, FeII and ZnII) are new compounds, which clearly indicated the power of the combined mechanochemical/annealing method for the synthesis of varied metal coordination complexes. [source] Novel ,-Conjugated Poly(Schiff base) Containing Thiazole and Tetrathiatetrahydropentalene MoietiesCHINESE JOURNAL OF CHEMISTRY, Issue 6 2005Jiang Li-Ming Abstract A new kind of ,-conjugated heterocyclic poly(Schiff base) was firstly prepared by the condensation reaction between tetrathiatetrahydropentalene-type diketone and bithiazole-diamine in good yields. The polymers were characterized by VPO, FTIR and 1H NMR spectroscopy. A large bathochromic shift was observed in UV-Vis spectra for these polymers due to the ,-,* transition in the conjugated main chain. Brief examination indicated that the nitrogen- and sulfur-containing polymers exhibited an excellent chelating tendency to metal ions and the corresponding polymeric complexes would be expected to have potential in applications. [source] | |||||||||||||