The three-dimensional coordination polymer poly[[aqua[μ4-2,2′-(diazene-1,2-diyl)dibenzoato]lead(II)] 1,2-bis(pyridin-4-yl)ethylene hemisolvate]

摘要

A novel three-dimensional coordination polymer, {[Pb(C14H8N2O4)(H2O)]·0.5C12H10N2}n, has been synthesized by hydrothermal reaction of Pb(OAc)2·3H2O (OAc is acetate), 2,2′-(diazene-1,2-diyl)dibenzoic acid (H2L) and 1,2-bis(pyridin-4-yl)ethylene (bpe). The asymmetric unit contains a crystallographically independent PbII cation, one L2? ligand, an aqua ligand and half a bpe molecule. Each PbII centre is seven-coordinated by six O atoms of bridging–chelating carboxylate groups from L2? ligands and by one O atom from a coordinated water molecule. The PbII cations are bridged by L2? ligands, forming [PbO2]n chains along the a axis. These chains are further connected by L2? ligands along the b and c axes to give a three-dimensional framework with a 41263 topology. The channel voids are occupied by bpe molecules.