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

Abstract Three 4d–4f heterometallic polymers, Ln 2 Ag 2 (Hpydc) 2 (pydc) 2 (ox) · 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.