Synthesis, Structure and Luminescent Property of a 2D Cd(II) Coordination Polymer Based on Mixed-ligands of 1,3-Bis(imidazol)propane and Pyridine-3,5-dicarboxylic Acid

A new Cd(II) coordination polymer, namely, [Cd(1,3-bip)(3,5-pdc)(n) (1,3-bip = 1,3-bis(imidazol)propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid) has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P2(1)/c with a = 1.40178(7), b = 1.72502(12), c = 1.41635(6) nm, beta = 92.653(4)degrees, V = 3.4212(3) nm(3), Z = 4, C16H15CdN5O4, M-r = 453.73, D-c = 1.762 g/cm(3), F(000) = 1808, mu= 1.310 mm(-1), R= 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd(II) ions and each Cd(II) attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature.