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

Hydrothermal reactions of NiCl2·6H2O or CdCl2·2.5H2O with 4,4′-bis(1-imidazolyl)bibenzene (bimb) and 5-oxyacetate isophthalic acid (H3OAIP) resulted in the formation of two coordination polymers [Ni2(HOAIP)2(bimb)3(H2O)2]n (1) and [Cd3(OAIP)2(bimb)(H2O)2]n·2nH2O (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 (44 · 65 · 8) Schläfli symbol in which 1D [Ni(HOAIP)]n chains are interlinked by bimb ligands. In 2, the two [Cd2(OAIP)4] and [Cd2(OAIP)4(H2O)4] units are interconnected by OAIP and bimb to afford a 3D network with a unique (4 · 82)4(42 · 68 · 85)2(86) Schläfli 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.