Construction, crystal structures, and luminescence properties of three coordination polymers from the same precursor, 4-(1H-benzimidazol-1-yl)benzonitrile

Abstract

Three coordination polymers based on different organic ligands, namely [Cu(bbn) 2 Cl] n (bbn = 4-(1H-benzimidazol-1-yl)benzonitrile, 1), [Zn(tpb) 2 ] n (Htpb = 1-(4-(2H-tetrazol-5-yl)phenyl)-1H-benzimidazole, 2), and [Cd(bba) 2 (H 2 O)] n (Hbba = 4-(1H-benzimidazol-1-yl)benzoic acid, 3), were constructed from the same precursor, bbn. The bbn precursor remains unchanged in complex 1 but undergoes in situ reactions to give complexes 2 and 3 under different experimental conditions. Complex 1 is a 1D chain based on [CuCl] n chains and bbn ligands. Complex 2 has a 1D chain composed of [Zn 2 (tpb) 2 ] subunits and tpb linkers. Complex 3 displays a twofold interpenetrating framework with dia topology. The results showed that the generation of different organic ligands from the same precursor via in situ reactions is a simple method for obtaining coordination polymer with diverse structures.The thermal stabilities and luminescent properties of selected compounds have been studied.