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Synthesis, Crystal Structures And Character Of Coordination Compounds Of Azobispyridine Ligands

Posted on:2006-09-26Degree:MasterType:Thesis
Country:ChinaCandidate:Y P ZhangFull Text:PDF
GTID:2121360155967749Subject:Inorganic Chemistry
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Design and self-assembly of metal complexes into supramolecular architecture through coordination bonds, hydrogen bonds and π-π interaction of aromatic rings, are currently attraction considerable in coordination chemistry. Researches on the transition metal complexes with pyridyl ligands have received considerable interest in recent years due to the pyridyl ligands can be used to construct many supramolecular complexes with novel structures and specific properties due to their many coordination spots and strong coordination abilities.In the work, we have synthesized and characterized twelve coordination compounds using ligands sush as 4,4'-azobispyridine and 3,3'-azobispyridine and transition metal cations Mn(Ⅱ), Cu(Ⅱ), Cd(Ⅱ), Co(Ⅱ), Zn(Ⅱ), Ni(Ⅱ) and Ag(Ⅰ). In this dissertation, we only reported eight coordination polymers from these two ligands, namely, [Mn(phen)3](ClO4)2(H2O)·0.5(4,4'-azpy) (1), [Cu(mal)(H2O) (4,4'-azpy)1/2]·H2O (mal=1, 3-malonate) (2), {[Cu(C2H3O2)2]·2(3,3'-azpy)} n(3) ,{[Cu (C3H5O2)2]·2(3,3'-azpy)} n(4), {Cu(C2Cl3O2)2(3,3'-azpy)H2O} n(5), {[Cu(3,3'-azpy)3(H2O)2](ClO4)2(H2O)2}n (6) , {[Cu(3,3'-azpy)3(H2O)2](BF4)2(H2O)2}n(7),and {[Cu(3,3'-azpy)(H2O)4](SiF6)(H2O)2}n(8). They have been synthesized and characterized by elementary analyses, IR, thermogravi -metric analyses and X-ray diffraction analyses. It shows these azobispyridine ligands usually function as bridge to connect two centers and form one-dimensional chain structure, two-dimensional network structure or three-dimensional network structure. To form complexes in thermodynamic or kinetic steady, these ligands may modify itself conformation. In the work, we also obtained different structure complexes by using different metal ions, anion and solvent.
Keywords/Search Tags:coordination polymer, azobispyridine, crystal structure, Cu(Ⅱ) complex, Mn(Ⅱ) complex
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