Two novel Zn(II) coordination polymers based on a carboxylate functionalized imidazophenanthroline derivative ligand

Two novel zinc(II) coordination polymers, [Zn2(Hcpip)2(ox)]n·2nH2O (1) and [Zn4(Hcpip)2(cpip)2(ox)]n·5nH2O (2), (H2cpip = 2-(2-carboxyphenyl) imidazo [4,5-f]1,10-phenanthroline, H2ox = oxalic acid), have been hydrothermally synthesized and characterized by elemental analysis, IR, single crystal X-ray diffraction. Compound 1 is a 1D chain, in which the dinuclear [Zn2(Hcpip)2]2+ units are linked through (ox)2− anions. Compound 2 is a 2D layer structure, which is constructed from the 1D chains bridged by (ox)2− anions. These two compounds possess strong luminescence and good thermal stabilities.