Synthesis and structures of three d10 metal coordination polymers constructed from flexible polycarboxylate and 1,10-phenanthroline ligands

Three novel d10 metal coordination polymers, {[Cd(H2odpa)(phen)2]·H2O}n (1), [Cd2(odpa)(phen)(H2O)2]n (2), {[Zn4(odpa)2(phen)2(H2O)2]·H2O}n (3), (H4odpa = 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 CdII/ZnII 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.

Graphical abstractThree d10 metal coordination polymers were prepared and characterized. Compound 1 forms a 1D zigzag chain. Compound 2 shows a 3D network comprised of tetranuclear cadmium clusters as the nodes and (odpa)4− as the linker. Compound 3 is an unprecedented 3D polymer based on octanuclear zinc cluster cross-linked by (odpa)4− ligands. The thermal stabilities and photoluminescence properties of 1–3 were also studied.Figure optionsDownload full-size imageDownload as PowerPoint slide