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

Abstract

Five new coordination polymers, [Cd(1,2′-cy) 0.5(bix)H 2O] n ( 1), [Cd 2(1,2′-cy) 2(1,10′-phen) 2(H 2O) 2] ( 2), {[Co(1,2-cy)(2,2′-bipy)(H 2O) 2]·2H 2O} n ( 3) {[Cd(succ)(1,10′-phen)H 2O]·H 2O} n ( 4), and {[Cd(succ)(2,2′-bipy)H 2O]·2H 2O} 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 π-π 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.