Crystal structure and fluorescence of a 2D cadmium(II) coordination polymer based on flexible bis(2-methylbenzimidazole) and benzenedicarboxylate co-ligands

摘要

A new coordination polymer, {[Cd(bbmb)(bdc)]} (n) (bbmb = 1,1'-(1,4-butanediyl)bis-(2-methylbenzimidazole), H(2)bdc = 1,3-benzenedicarboxylic acid) was synthesized under hydrothermal conditions. The complex was structurally characterized by single crystal X-ray diffraction analyses, infrared spectroscopy (IR), elemental analyses. The compound crystallizes in the monoclinic system, space group P2(1)/c with a = 10.860(6) , b = 13.115(7) , c = 21.009(9) , beta = 120.94(2)A degrees, V = 2567(2) (3), Z = 4, C28H26CdN4O4, M (r) = 594.93, D (c) = 1.540 g/cm(3), mu = 0.893 mm(-1). Each cadmium center is six coordinated with four O atoms from two bdc(2-) anions, and two N atoms of two bbmb ligands. The complex features a 4-connected 2D (4, 4) sheet with a point symbol {4(2).6(2}). Fluorescence properties of the title complex were investigated.