[Cu(NTB)Cl]ClO_4·2.5CH_3OH的合成、晶体结构和多酚氧化酶活性研究(英文)

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

合成了配合物[Cu(NTB)Cl]ClO4.2.5CH3OH(NTB为N,N,N-三(2(-苯并咪唑甲基)胺),并进行了紫外可见光谱、元素分析、循环伏安和单晶X射线衍射分析等表征.用UV-Vis.研究了以邻苯二酚、邻苯三酚为底物时配合物的多酚氧化酶活性,结果表明:配合物的多酚氧化酶活性符合米氏方程曲线;在pH为8.0和30℃的条件下,配合物催化邻苯三酚和邻苯二酚反应的转化数分别为88.2 h-1和0.54 h-1.通过动力学数据比较发现,邻苯三酚比邻苯二酚更容易氧化,而且它们的催化氧化速率都随着pH的升高而增大.

： The title complex [ Cu （NTB） Cl ] ClO4 2.5 CH3 OH （ NTB = riffs （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.