Syntheses, Crystal Structure and Luminescent Property of 1D Chain-Like Coordination Polymer [Pb-2(C8H7O2)(4)(H2O)(2)](n)

The coordination polymer [Pb-2(m-ta)(4)center dot(H2O)(2)](n) (H m-ta=m-toluic acid) was synthesized under hydrothermal conditions and characterized via IR, CHN elemental analysis, and single crystal X-ray diffraction analysis. The complex belongs to monoclinic system, space group P2(1)/n with a=0.717 45(3) nm, b=4.274 5 (2) nm, c=1.071 26(5) nm, beta=90.765 0(10)degrees, V=3.285 0(3) nm(3), Z=4, D-c=2.004 g.cm(-3), F(000)=1872, mu=10.291 mm(-1), R-1=0.035 2, wR(2)= 0.065 1. The asymmetric unit contains two Ph-II atoms, four m-ta ligands and two water molecules. Each Pb-II is heptacoordinated, belonging to the hemidirected coordination geometry. The Pb atoms are bridged through the carboxylate O atoms, leading to a central Pb2O2 core. The coordinating water molecules and carboxylate O atoms are involved in extensive O-H center dot center dot center dot O hydrogen-bonding interactions. The complex has an extended chain structure and the chains are assembled by hydrogen bonds and pi-pi interactions (centroid-centroid distance=0.362 46 nm) into a three-dimensional supramolecular structure. The luminescent. property in solid state of complex has been further studied and discussed. CCDC: 735407.