Hydrothermal synthesis and crystal structures of two zinc(II) coordination polymers with benzophenone-4,40-dicarboxylic acid

Two new coordination polymers, [Zn(bpndc)(4,40-bpy)1.5]n$0.5n(4,40-bpy)$0.5nH2O (1) and [Zn(bpndc)(phen)(H2O)]n (2) (H2bpndcZ benzophenone-4,40-dicarboxylic acid; 4,40-bpyZ4,40-bipyridine; phenZ1,10-phenanthroline) were synthesized by the hydrothermal reactions and characterized by single crystal X-ray diffraction, elemental analysis, IR spectrum and thermal analysis. In 1, 4,40-bpy molecules link Zn(II) ions into one-dimensional ladders, and these ladders are bridged by bpndc2K ligands, resulting in an infinite two-dimensional rhombohedral network. Such rhombohedral grids interweave each other, forming a three-dimensional structure. In 2, Zn2O2 cores are interconnected by bpndc2K ligands to generate a one-dimensional centripede-like double-chain structure, and further assembled by O–H/O hydrogen bonds and p–p stacking interactions to form three-dimensional supramolecular network with one-dimensional channels. q 2004 Elsevier B.V. All rights reserved.