Flexible Bis(benzimidazole)-based Ligands Directed the Structure Characteristics of Coordination Polymers Based on Diphenic Acid Co-ligands:Syntheses, Structures and Properties

摘要

Two new coordination polymers [Cu2(bbim)(dpa)2(C2H5OH)2] (1),[Co(dpa)2(bbbm)](2) (H2dpa =diphenic acid,bbim =1,1'-(1,6-hexanediyl)bis-1H-benzimidazole,bbbm =1,1'-(1,4-butanediyl)bis-lH-benzimidazole) constructed from bis(benzimidazole)-based ligands with different lengths and diphenic acid co-ligand have been synthesized under solvothermal conditions.Complex 1 possesses Cu-dpa helical chains.The adjacent chains are connected by the bbim ligands into two-dimensional (2D) 3-connected (63) topology.Differently,the layer structure of 2 was consisted by one-dimensional chains containing alternated 8-and 18-membered rings.Furthermore,the thermal stability and fluorescence property for all crystalline materials have been investigated.