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Hydrothermal Syntheses, Crystal Structures And Properties Of Complexes Assembled By Naphthalene-1, 8-dicarboxylate Ligand

Posted on:2010-05-20Degree:MasterType:Thesis
Country:ChinaCandidate:X FengFull Text:PDF
GTID:2121360278968470Subject:Physical chemistry
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The synthesis and property of metal-organic hybrid complexes have represented one of the most active research areas in chemistry and materials science. The selection of the appropriate organic ligand is the most important key in the research areas. Aromatic carboxylic acids, which possess good structure rigidity and thermo-stability, have broadly been used in the construction of new complexes. In this thesis, we select naphthalene-1,8-dicarboxylic anhydride as our origin ligand. The reason is as follows: Naphthalene-1,8-dicarboxylic anhydride can hydrolyze under hydrothermal conditions into the naphthalene-1,8-dicarboxylate ligand. Naphthalene-1,8-dicarboxylate ligand has two carboxyl groups and a naphthalene ring, including rich coordination modes, so we can use naphthalene-1,8-dicarboxylate as links to build novel structures. Hydrogen bonds andπ-πinteractions can consolidate complexes or build supramolecular structures. We have hydrothermally synthesized nine metal-organic complexes with naphthalene-1, 8-dicarboxylate:1.[Zn(1,8-nap)(H2O)]n(1)2.[Zn4(1,8-nap)4(4,4'-bipy)2·0.5en·H2O]n(2)3.[Cd(1,8-nap)]n(3)4.{[Cd2(1,8-nap)2(H2O)2](bpp)2}n(4)5.[Cd4(1,8-nap)4(2,2'-bipy)4(H2O)8]·6H2O(5)6.[Mn4(1,8-nap)4(2,2'-bipy)4(H2O)8]·4H2O(6)7.[Zn4(1,8-nap)4(2,2'-bipy)4(H2O)4]·2H2O(7) 8.[Cd4(1,8-nap)4(2,2'-bipy)4(H2O)8]·6H2O(8)9.[Zn2(1,8-nap)2(2,2'-bipy)2(H2O)2]·4H2O(9)The results of the X-ray single-crystal structure analysis are as follows: Complex 1 is a two-dimensional layer. Complex 2 is a one-dimensional double chain. Complex 3 is a six-connected (3, 6) network topology structure. Complex 4 is a one-dimensional chain with one 16-membered ring and one 24-membered ring. Complexes 5,6,8,9 are three-dimensional supramolecular networks constructed by hydrogen bonds andπ-πinteractions. The coordination modes of carboxylate in complex 5 and complex 8 are different. Complex 7 is a two-dimensional layer constructed by two kinds ofπ-πinteractions. We have studied the IR, elementary analysis, thermo-gravimetric property and luminescence property.
Keywords/Search Tags:Naphthalene-1,8-dicarboxylic Anhydride, Naphthalene-1,8-dicarboxylate, Crystal Structure, Thermo-gravimetric Property, Luminescence Spectrum
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