Synthesis,Crystal Structure and Polyphenol Oxidase Activities Study of [Cu(NTB)Cl]ClO_4·2.5CH_3OH

The title complex [Cu(NTB)Cl]ClO4 2.5 CH3OH(NTB = Tris(benzimidazolyl-2-methyl) amine) has been synthesized and characterized by UV-Vis.,elemental analysis,cyclic voltammetry and single crystal X-ray diffraction analysis.Polyphenol oxidase activities toward pyrogallol and catechol have been studied spectroscopically.Their kinetics obey the Michaelis-Menten equation.The turnover numbers of the complex toward pyrogallol are 88.2 h-1 and 0.54 h-1 for catechol at pH 8.0 and 30 ℃.Compared with the kinetic data,it is apparent that pyrogallol oxidation is easier than catechol,and catalytic activities increase with increasing of pH values.