Coordination polymers with mixed 1, 3-bis(1-imidazolyl)-5-(imidazol-1-ylmethyl)benzene and multicarboxylate ligands: Synthesis, structure and property

Five new coordination polymers [Zn-3(biimb)(2)(BPT)(2)]center dot 4DMF center dot 2.5H(2)O (1), [Zn(biimb)(NDC)]center dot 1.5H(2)O (2), [Zn(biimb)(NDC)]center dot 3DMF (3), [Cd(biimb)(NDC)(0.5)Cl]center dot 3H(2)O (4) and [Cd-3(biimb)(2)(BPDC)(3)(H2O)(4)]center dot 4H(2)O (5) [biimb = 1,3-bis(1-imidazolyl)-5-(imidazol-1-ylmethyl)benzene, H3BPT = biphenyl-3,4',5-tricarboxylic acid, H2NDC = 2,6-naphthalenedicarboxylic acid, H2BPDC = 4,4'-biphenyldicarboxylic acid, DMF = N,N-dimethylformamide] were synthesized by hydro/solvothermal reactions and characterized by elemental, thermogravimetric analyses, IR, powder and single crystal X-ray diffractions. Complex 1 is a (3,3,4,4)-connected 4-nodal 3D framework. The linkage of Zn(II), biimb and NDC2- makes a 2D network structure of 2, in which biimb acts as a bidentate ligand, while in 3, the biimb ligands display as tridentate and connect Zn(II) to compose 2D networks, which are further linked together by NDC2- to generate 3D structure of 3. 4 is a pillared-layer 3D net containing [Cd(biimb)Cl](+) layers and NDC2- pillars, 5 is an interesting 3-fold interpenetrating 3D net. Photoluminescence and gas adsorption properties of the complexes were investigated. (C) 2016 Elsevier Inc. All rights reserved.