高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (12): 1322.

• 研究论文 • 上一篇    下一篇

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

沈孟长1, 罗勤慧1, 朱守荣1, 屠庆云1, 戴安邦1, 刘安东2, 谷洪春2, 李凤梅2, 狄少杰2   

  1. 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
  • 收稿日期:1990-08-21 出版日期:1990-12-24 发布日期:1990-12-24
  • 通讯作者: 罗勤慧

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

Shen Meng-chang1, Luo Qin-hui1, Zhu Shou-rong1, Tu Qing-yun1, Dai An-bang1, Liu An-dong2, Gu Hong-chun2, Li Feng-mei2, Di Shao-jie2   

  1. 1. Coordination Chemistry Institute, Nanjing University, Nanjing 210008;
    2. Institute of Law Energy Nuclear Physics, Beijing Normal University, Beijing 100875
  • Received:1990-08-21 Online:1990-12-24 Published:1990-12-24

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被引次数

34

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'-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Kcat为1.78×106mol-1·L·s-1(pH=7.0)和1.06×106mol-1·L·s-1(pH=7.8)。其反应机理与超氧歧化酶有类似之处。

关键词: 脉冲辐解, 超氧离子, 反应速率, 歧化, 大环二氧四胺铜(Ⅱ)配合物

Abstract: 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 mol-1·L·s-1(at pH 7.8). The reaction mechanism is similar to that catalyzed by superoxide dismutase.

Key words: Pulse radiolysis, Superoxide ion, Reaction rate, Dismutation, Macrocyclic dioxote-tramine-copper(Ⅱ) complex

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