A hexa-coordinate 3,5-pyridinedicarboxylic acid and imidazole react with copper chloride in the ethanol aqueous solution, water solution, and copper chloride in an N,N-dimethylformamide aqueous to give the complex Cu(IMZ)(3,5-pdc)4] (IMZ: imidazole). The complex has been characterized by elemental analysis, IR spectra, X-ray crystal diffraction, cyclic voltammetry, and thermogravimetry. The Cu atom is bridged by 3,5-pyridinedicarboxylic acid and imidazole ligand into 2D structure. [ABSTRACT FROM AUTHOR]