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高等学校化学研究 ›› 1990, Vol. 6 ›› Issue (4): 354-359.

• Articles • 上一篇    下一篇

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

Shen Mengchang1, Luo Qinhui1, Zhu Shourong1, Tu Qingyun1, Dai An bang1, Liu Andong2, Ou Hongchun2, Li Fengmei2, Di Shaojie2   

  1. 1. Coordination Chemistry Institute, Nanjing University, Nanjing;
    2. Institute of Law Energy Nuclear Physics, Beijing Normal University, Beijing
  • 收稿日期:1990-08-21 出版日期:1990-12-24 发布日期:2011-09-09

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

Shen Mengchang1, Luo Qinhui1, Zhu Shourong1, Tu Qingyun1, Dai An bang1, Liu Andong2, Ou Hongchun2, Li Fengmei2, Di Shaojie2   

  1. 1. Coordination Chemistry Institute, Nanjing University, Nanjing;
    2. Institute of Law Energy Nuclear Physics, Beijing Normal University, Beijing
  • Received:1990-08-21 Online:1990-12-24 Published:2011-09-09

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摘要： We studied the reaction kinetics of dismutation for superoxide ion by copper (Ⅱ) complex of macrocycllc dioxotetramine ligand 12- ( 4'-nitro )- benzyl-1,4,7,10-tetraazacy-clotridecane-11,13-dionato copper (Ⅱ) by using pulse radiolysis. The rate constants of dismutation kcat's were measured to be 1.78×106mol-1·L·s-1(at pH 7.8) and 1.06×106mol-1·L·s-1(at pH 7.8). The reaction mechanism is similar to that catalyzed by super-oxide dismutase.

关键词: Pulse radiolysis, Superoxlde ion, Reaction rate, Dismutation, Macrocyclic dioxotetramlne-copper(Ⅱ) complex

Abstract: We studied the reaction kinetics of dismutation for superoxide ion by copper (Ⅱ) complex of macrocycllc dioxotetramine ligand 12- ( 4'-nitro )- benzyl-1,4,7,10-tetraazacy-clotridecane-11,13-dionato copper (Ⅱ) by using pulse radiolysis. The rate constants of dismutation kcat's were measured to be 1.78×106mol-1·L·s-1(at pH 7.8) and 1.06×106mol-1·L·s-1(at pH 7.8). The reaction mechanism is similar to that catalyzed by super-oxide dismutase.

Key words: Pulse radiolysis, Superoxlde ion, Reaction rate, Dismutation, Macrocyclic dioxotetramlne-copper(Ⅱ) complex