A Copper Coordination Polymer Based on 3-(4-Hydroxypyridinium-1-yl) Phthalic Acid: Synthesis and Crystal Structure

A three-dimensional copper-organic coordination polymer based on 3-(4-hydroxypyridinium-1-yl) phthalic acid (H2L) and -4,4-bipyridine (bpy), [Cu(L)(bpy)(1/2)(H2O)](n) (1), has been obtained by hydrothermal synthesis and characterized by elemental analysis, the powder X-ray diffraction (PXRD), UV-vis absorption spectra, and also by single-crystal X-ray diffraction. The crystal is triclinic, space group P. The L2- anions of complex 1 as a bridging ligand connect Cu(II) ions to form one-dimensional (Cu-2(L)(2))(n) chains, which are linked to build a 2D layer by the bpy ligands. The 3D supramolecular framework of complex 1 are guided or controlled by weak directional interlayer hydrogen bond interactions.