Synthesis, structure and sorption property of metal complexes with mixed multicarboxylate and imidazole-containing ligands

Zinc(II) and nickel(II) frameworks [Zn-2(L)(BTC)(NO3)]center dot H2O center dot 2CH(3)CN (1), [Ni-2(L)(H2O)(3)(HBTC)(2)]center dot-3.6H(2)O (2), [Ni(L)(H2O)(2)](BPDC)center dot 2H(2)O (3), [Ni(L)(H2O)(BPDC)]center dot 4H(2)O (4) and [Ni-2(L)(MeOH)(4)(BPDC)(2)]center dot 2H(2)O (5) were synthesized by reactions of corresponding metal salts with 3,3',5,5'-tetra(1H-imidazol-1-yl)-1,1'-biphenyl (L) and multicarboxylic acids of 1,3,5-benzenetricarboxylic acid (H3BTC), 4,4'-biphenyldicarboxylic acid (H2BPDC). Complex 1 is a 2-fold interpenetrating 3D net, while 2 is a 20 network with infinite 1D hinged Ni(II)-L chains linked by HBTC2- ligands. 3, 4 and 5 were obtained by using different molar ratios of L, H2BPDC and Ni(II) salt, and found to show different 2D network structures in which the numbers of coordinated carboxylate groups of BPDC2- are 0, 1 and 2, respectively. Sorption properties of 1-5 were investigated. (C) 2015 Elsevier Inc. All rights reserved.