Metal ion-driven assembly of 3D coordination polymers with 5-oxyacetate isophthalic acid and 4,4′-bis(1-imidazolyl)bibenzene

Hydrothermal reactions of NiCl2 center dot 6H(2)O or CdCl2 center dot 2.5H(2)O with 4,4'-bis(1-imidazolyl)bibenzene (bimb) and 5-oxyacetate isophthalic acid (H(3)OAIP) resulted in the formation of two coordination polymers [Ni-2(HOAIP)(2)(bimb)(3)(H2O)(2)](n) (1) and [Cd-3(OAIP)(2)(bimb)(H2O)(2)](n)center dot 2nH(2)O (2), respectively. Compounds 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 exhibits three-fold interpenetrating 3D architecture with a (4(4) . 6(5) . 8) Schlafli symbol in which 1D [Ni(HOAIP)](n) chains are interlinked by bimb ligands. In 2, the two [Cd-2(OAIP)(4)] and [Cd-2(OAIP)(4)(H2O)(4)] units are interconnected by OAIP and bimb to afford a 3D network with a unique (4 . 8(2))(4)(4(2) . 6(8) . 8(5))(2)(8(6)) Schlafli symbol. The results showed that metal ions did exert great influence upon the coordination modes and the geometrical conformations of ligands and the topological structures of the final products. Their thermal and photoluminescent properties were also investigated. (C) 2013 Elsevier B.V. All rights reserved.