CRCU

Chemical Research in Chinese Universities ›› 1990, Vol. 6 ›› Issue (4): 354-359.

• Articles • Previous Articles     Next Articles

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

PDF (PC)

Cited

10

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