Two new d~(10) metal-directed coordination polymers based on an unsymmetrical ligand 3-pyrimidin-5-ylbenzoic acid

摘要

Two novel d~(10) metal coordination polymers [Cd(3,5-PMBC)2(H2O)2] (1) and {[Zn(3,5-PMBC)2(H2O)2]-2H2O} (2) (3,5-PMBC = 3-pyrimidin-5-ylbenzoic acid) have been synthesized under solvothermal conditions, and characterized by IR spectroscopy, powder and single crystal X-ray diffractions. In 1 and 2, the d~(10) metal ions (Zn~(2+) and Cd~(2+)) directed the self-assemblies to form two types of significantly different coordination structures: 1 exhibits one-dimensional double-stranded chain, while 2 displays a unique two-dimensional undulated double layer. Both are further stacked via hydrogen-bond interactions to assemble three-dimensional supramolecular structures. Thermal and photoluminescent properties of 1 and 2 are also investigated in details.