Selection of rigid N-donor ligands influence the dimensions and luminescences of five new Cd(II) coordination polymers, based on a flexible tricarboxylic acid

Abstract In this article, it has used four rigid bidentate N-donor ligands (phen = phenanthroline, 2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine, bpe = 1,2-bis(4-pyridyl)ethene) reacted with the Cd(II) ions and flexible ligand 4,4′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid (H3cpbda), and successfully synthesized five complexes with different dimensions and luminescence properties. In addition to the “T” and “Y” shaped molecular configurations of H3cpbda, the “M” shaped molecular configuration is found for the first time. Three types of molecular configurations act various roles to assemble different dimensional structures. Furthermore, the influence of two different kinds of rigid bidentate N-donor ligands on dimensions and luminescence properties has been studied.