Cadmium(II) and cobalt(II) coordination polymers constructed from 4,4′-di(1H-imidazol-4-yl)biphenyl and varied multicarboxylate ligands: Synthesis, structure and property

Five new coordination polymers [Cd-2(H2L)(BPDA)(2)] (1), [Cd-2(HL)(H2L)(1.5)(BHTC)]center dot H2O (2), [Cd-2(H2L)(2) (BPTC)]center dot H2L (3), [CO2(HL)(2)(BPDA)] (4) and [Co-2(H2L)(2)(BPTC)]center dot 4H(2)O (5) have been isolated by reactions of corresponding metal salt with 4,4'-di(1H-imidazol-4-yl)biphenyl (H2L) and multicarboxylic acids of biphenyl-4,4'-dicarboxylic acid (H(2)BPDA), biphenyl-3,4',5-tricarboxylic acid (H3BHTC) and biphenyl-3,3',5,5'-tetracarboxylic acid (H4BPTC) and structurally characterized. 1 forms a 5-fold interpenetrating 3D dmp net by cross-linking of two different kinds of infinite zigzag chains of Cd-H2L and Cd-BPDA, 2 and 5 are 2D networks with different topologies, 3 is a 3D sqc11 net with Cd-BPTC layers pillared by H2L, while 4 exhibits a 3D InS net with Co-H2L 2D networks further connected by BPDA(2-) ligands. Thermal stability of the complexes, solid state luminescent property of 1-3 and sorption property of 5 have been investigated. (C) 2014 Elsevier Ltd. All rights reserved.