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Benzene and azobenzene pyrimidine carboxylic acid coordination polymer synthesis and characterization

Author: WangZuo
Tutor: TianYunQi;LuoJunHua
School: Liaoning Normal University
Course: Inorganic Chemistry
Keywords: Coordination polymers Phenyl pyrimidine carboxylic acid Azo- biphenyl carboxylic acid Solvothermal synthesis Crystal structure
CLC: O634
Type: Master's thesis
Year: 2011
Downloads: 36
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Abstract


Inorganic - organic hybrid build supramolecular chemistry has become one of the hot research field. Metal center ions and organic ligands by coordination and hydrogen bonding, π-π interactions such as self-assembled supramolecular forces to form a network structure with periodic crystalline metal organic framework materials. Compared with the conventional inorganic materials, their synthesis under mild conditions. Not only the structure varied, while the gas adsorption, molecular catalysis, magnetism, nonlinear optics and optical functional materials such as the field of application has important academic significance and potential applications. Appropriate metal ions and oxygen-containing organic ligands, based on self-assembly is expected to be adopted with the expected structure and properties of the coordination polymer. Select this thesis two different ligands: pyrimidine benzene carboxylic acid (3-pyrimidin-5-ylbenzoic) and azo biphenyl carboxylic acid (3,4 ',5-azobenzenetricarboxylate) with transition metals and lanthanide rare earth metals, in assembled under solvothermal synthesis of eleven novel coordination polymer. The use of X-ray diffraction analysis, elemental analysis (EA), infrared spectroscopy (IR), thermal gravimetric analysis (TGA), powder X-ray diffraction (PXRD) were characterized by means of new compounds synthesized were characterized and performance testing. Option 3 - pyrimidine-5 - benzene carboxylic acid (3,5-PMBC) organic ligands with transition metal ions M 2 (M = Cu, Cd, Zn, Co) obtained by solvent thermal reaction five novel coordination polymer, [Cu (3,5-PMBC) 2 ] n (1): monoclinic, C2 / c space group, a = 13.746 (4) (A | °), b = 16.980 (5) (A | °), c = 18.786 (6) (A | °), α = γ = 90.00 °, β = 100.025 (5) ° a skeleton having a one-dimensional chain structure. [Cu (3,5-PMBC) 2 (H 2 O) 2 ] n (2) and [Cd (3,5 - PMBC) 2 (H 2 O) 2 ] n (3) is isomorphic to the body, is monoclinic, P21 / c space group, the performance of the one-dimensional skeleton duplex structure. {[Zn (3,5-PMBC) 2 (H 2 O) 2 ] · 2H 2 O } n (4) and {[Co (3,5-PMBC) 2 (H 2 O) 2 ] · 2H 2 O} n (5) is isomorphic to the body, is monoclinic, P21 / c space group, whose skeleton has a two-dimensional wave-layer structure. Selection of 3,4 '- azobis biphenyl tricarboxylic acid (H 3 abtc), the thermal reaction in a solvent under conditions effective to obtain lanthanide metal ions with polymers six isomorphic , {[Ln (abtc) (DMF) 2 ] · H 2 O} n (Ln = Nd, Sm, Eu, Gd, Tb, Er, 6-11 ). This series of coordination polymers are monoclinic, C2 / c space group, with octahedral Ln 2 (COO) 6 secondary structural units (SBUs), By abtc3-carboxylate ligands to these secondary structural units are connected together, thus forming a three-dimensional porous skeletal structure.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Elements of the organic polymer
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