Syntheses, crystal structure and luminescent property of 1D chain-like coordination polymer [Pb 2(C 8H 70 2) 4(H 20) 2] n

The coordination polymer [Pb 2(m-ta) 4 n• (H 20) 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 1ln with a=0.717 45(3) nm, 6=4.2745 (2) nm, c=1.071 26(5) nm, "=90.765 0(10) 7=3.285 0(3) nm 3, ?=4, #=2.004 g • cm -3, A(000)=1 872,/"=10.291 mm -1, B&=0.035 2, wR 2= 0.065 1. The asymmetric unit contains two Pb ! atoms, four m-ta ligands and two water molecules. Each Pb ! is heptacoordinated, belonging to the hemidirected coordination geometry. The Pb atoms are bridged through the carboxylate 0 atoms, leading to a central Pb202 core. The coordinating water molecules and carboxylate 0 atoms are involved in extensive O-H-O hydrogen-bonding interactions. The complex has an extended chain structure and the chains are assembled by hydrogen bonds and #-# 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.