Synthesis, characterization and property study of new coordination polymers constructed from flexible dicarboxylates and bidentate nitrogen mixed ligands

Five new coordination polymers, [Cd(1,2'-cy)(0.5)(bix)H2O](n) (1), [Cd-2(1,2'-cy)(2)(1,10'-phen)(2)(H2O)(2)] (2), {[Co(1,2-cy)(2,2'-bipy)(H2O)(2)]center dot 2H(2)O}(n) (3) {[Cd(succ)(1,10'-phen)H2O]center dot H2O}(n) (4), and {[Cd(succ)(2,2'-bipy)H2O]center dot 2H(2)O}(n) (5) (1,2-cy = 4-cyclohexene-1,2-dicarboxylate, succ = succinic acid, bix = 1,4-bis(imidazol-1-ylmethyl)benzene, 1,10'-phen = 1,10-phenanthroline, 2,2'-bipy = 2,2'-bipyridine), have been synthesized and characterized by single-crystallographic X-ray diffraction. Complex 1 shows a two-dimensional covalent layer structure. Complex 2 exhibits a two-dimensional supramolecular layer network composed from discrete fundamental units. Complex 3 exhibits a one-dimensional covalent chain-like structure, which further extends to a two-dimensional supramolecular structure with hydrogen bonding and pi-pi interactions respectively. Complexes 4 and 5 show three-dimensional supramolecular networks composed from one-dimensional chain-like covalent structures. Furthermore, the magnetic property of complex 3 and fluorescent properties of complexes 1, 2, 4 and 5 have also been studied. (C) 2009 Elsevier Masson SAS. All rights reserved.