Synthesis, crystal structure, and characterization of a novel supramolecular coordination polymer [Cu(Pcba)_3]_n

摘要

The authors present a novel compound [Cu(Pcba)_2]_n synthesized from the reaction between copper(I) thiocyanate and the ligand Pcba (Pcba = 2-pyrazine carboxylic acid), which exhibits a one-dimensional structure and has been characterized by Xray crystallography. In the process of synthesis, copper(I) ion has been oxidized into copper(II). This compound crystallizes in monoclinic, space group P2 (1)/c with cell parameters of a = 5.0387(4) ?, b = 15.3317(13) ?, c = 7.0720(6) ?, β = 106.63(0)°. The central ion Cu(II) is six-coordinated in a typical hexahedral geometry by four oxygen atoms and two nitrogen atoms in Pcba. Except chelating with two Pcbas, each central ion Cu(II) is extended to form one-dimensional linear structure through Pcba as the bridge. This compound was further characterized with IR spectra, fluorescence properties, UV-vis properties, and thermal analysis.