Construction of a New Two-fold Interpenetrated Three-dimensional Cobalt(Ⅱ) Coordination Polymer Based on 2,5-Thiophenedicarboxylic Acid and Bis(imidazol-1-yl)methane

摘要

A cobalt coordination polymer,{[Co2(tdc)2(bimm)2]·(3DMF)}n,was synthesized based on 2,5-thiophenedicarboxylic acid (H2tdc) and bis(imidazol-1-yl)methane (bimm) mixed ligands.The asymmetric unit of the complex contains two Co2+ cations,two tdc2-dianions,two neutral bimm ligands,and three free DMF molecules.In the complex,deprotonated tdc2-dianions alternately bridge the adjacent Co2+ cations to generate chains,which are further connected by the flexible bimm ligands to form a 3D structure containing adamantanoid-like subunits.In topology,the structure of 1 represents a 4-connected uninodal two-fold interpenetrated dia (66) topology.Moreover,the solid UV-Vis absorption spectra of the complex have also been investigated.