脉冲辐解法研究大环二氧四胺铜(Ⅱ)配合物歧化超氧离子的动力学  

A Kinetic Study on Dismutation of Superoxide Ion by Macrocyclic Dioxotetramine-Copper(Ⅱ) Complex by Using Pulse Radiolysis

作　　者：沈孟长[1] 罗勤慧[1] 朱守荣[1] 屠庆云[1] 戴安邦[1] 刘安东 谷洪春 李凤梅[2] 狄少杰 

机构地区：[1]南京大学配位化学研究所,210008 [2]北京师范大学低能核物理研究所,100875

出　　处：《高等学校化学学报》1990年第12期1322-1326,共5页Chemical Journal of Chinese Universities

摘　　要：用脉冲辐解法研究大环二氧四胺配体的铜配合物12-(4~1-硝基)-苄基-1,4,7,10-四氮杂环十三烷-11,13-二酮合铜(Ⅱ)歧化超氧离子的动力学,求得其歧化速率常数K_(cat)为1.78×10~6 mol^(-1)·L·s^(-1)(pH=7.0)和1.06×10~6 mol^(-1)·L·s^(-1)(pH=7.8)。其反应机理与超氧歧化酶有类似之处。We studied the reaction kinetics of dismutation for superoxide ion by copper ( Ⅱ ) complex of macrocyclic dioxotetramine ligand 12-(4'-nitro)-benzyl-1,4,7,10-tetraazacyclotridecane-11, 13-dionato copper( Ⅱ )by using pulse radiolysis. The rate constants of dismutation kcat were obtained to be 1. 78×106 mol-1.L-s-1(at pH 7. 0) and 1. 06×106 mor-1.L.s-1(at pH 7. 8). The reaction mechanism is similar to that catalyzed by superoxide dismutase.

关 键 词：铜配合物 大环二氧四胺 O2^- 歧化 

分 类 号：O614.121[理学—无机化学]