Synthesis and Dye Degradation Properties of Cu2+ complexes with Benzimidazole Derivatives

Six benzimidazole derivatives were synthesized and charactrized by IR spectra, 1H-NMR spectra and MS spectra. The coordination reaction of the derivatives with CuCl2. And six novel Cu(II)complexes with the derivatives were prepared and characterized by UV spectra, IR spectra and elemental analysis. The catalytic degradation of methyl orange aqueous solution was investigated using the complexes as catalysis in presence H2O2 by HPLC method and Vis-spectrophotometry. The result of characterization showed that there are four coordination sites around Cu( II) in all complexes, which are respectively occupied by one sulfur atom (from the derivative), one nitrogen atom(from the derivative), one oxygen atom(from the OH-) and one chlor atom(from the Cl-). The degradation of methyl orange indicated that all the complexes show the properties of enzyme activity. And the main degradation products determined were hydroquinone and maleic acid.