Synthesis, Crystal Structure, and Fluorescence of a New 3D Nd(III) Coordination Polymer Based on the Pyridine-3,5-Dicarboxylate and In Situ Generated Oxalate Ligand
A new three-dimensional neodymium(III)-containing coordination polymer, [Nd2(μ2-ox)(μ4-PDC)2(H2O)4]•2H2O (1) (H2PDC = pyridine-3,5-dicarboxylic acid, H2ox = oxalate acid), has been successfully synthesized under hydrothermal conditions via mixed-ligand of pyridine-3,5-dicarboxylate and in situ generated oxalate, and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The crystal structural analysis reveals that complex 1 displays an unusual three-dimensional framework with a pillared-layer containing a two-dimensional metal-organic layer architecture, and possesses a rare bimodal (4,5)-connected net with (44.62)(44.64.82) topology. Moreover, complex 1 exhibits intense fluorescent emission at room temperature in the solid state.
