3D pillar-layered 4d-4f heterometallic coordination polymers based on pyridine-3,5-dicaboxylate and oxalate mixed ligands

Three 4d-4f heterometallic polymers, Ln(2)Ag(2)(Hpydc)(2)(pydc)(2)(ox)center dot 4H(2)O (Ln = Nd (1), Eu (2) and Er (3);H(2)Pydc = pyridine-3,5-dicarboxylic acid, H(2)ox = oxalic acid), have been successfully synthesized under hydrothermal condition and structurally characterized. Single-crystal X-ray diffraction analyses reveal that three compounds are isomorphous and exhibit 3D pillar-layered coordination frameworks constructed from two-dimensional lanthanide-carboxylate layers and [Ag(pydc)](-) pillars. Furthermore, the luminescent property of compound 2 was studied. (C) 2009 Elsevier B.V. All rights reserved.