Synthesis and structures of three d 10 metal coordination polymers constructed from flexible polycarboxylate and 1,10-phenanthroline ligands

Abstract

Three novel d 10 metal coordination polymers, {[Cd(H 2odpa)(phen) 2]·H 2O} n ( 1), [Cd 2(odpa)(phen)(H 2O) 2] n ( 2), {[Zn 4(odpa) 2(phen) 2(H 2O) 2]·H 2O} n ( 3), (H 4odpa = 4,4′-oxydiphthalic acid, phen = 1,10-phenanthroline) were obtained with different metal/ligand ratios through hydrothermal method and characterized. Compound 1 forms a one dimensional zigzag chain, in which two phen ligands chelate to one cadmium atom. Compound 2 shows a three dimensional network structure comprised of new tetranuclear cadmium clusters as the nodes and (odpa) 4− anions as the linkers, exhibits an unusual topological structure. Compound 3 is an unprecedented three dimensional polymer based on octanuclear zinc clusters cross-linked by (odpa) 4− anions. In 1– 3, central Cd II/Zn II ions and (odpa) 4− ligand display completely different coordination modes and conformations. In addition, the thermal stabilities and photoluminescence properties of 1– 3 were also studied.