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| 停流法研究Cu(Ser)2及Cu(Gly-Gly)2催化O2·-歧化反应动力学 | |
| 引用本文： | 谢英,金虬,李大珍,高盘良,自俊青.停流法研究Cu(Ser)2及Cu(Gly-Gly)2催化O2·-歧化反应动力学[J].高等学校化学学报,1998,19(8):1288-1291. |
| 作者姓名： | 谢英 金虬 李大珍 高盘良 自俊青 |
| 作者单位： | 1. 北京大学化学系,北京,100871 2. 大理师范学院化学系,大理,671000 3. 北京师范大学化学系,北京,100875 |
| 基金项目： | 国家自然科学基金，29775015， |
| 摘 要： | 采用停流法对pH=7.8的磷酸盐缓冲液体系中丝氨酸铜Cu(ser)2和甘氨酰甘氨酸铜Cu(Gly-Gly)2催化超氧阴离子自由基O2-歧化反应的动力学进行了研究,求得不同温度下的催化速率常数Kcat、反应级数n、活化能Ea及指前因子A,初步探讨了Cu(Ser)2和Cu(Gly-Gly)2催化O2-歧化反应机理,证实了第一步反应为整体反应过程的速控步骤. |
| 关 键 词： | 超氧阴离子自由基Oi- SOD模拟物 停止流动法 催化机理 |
| 修稿时间： | 1997年5月27日 |
The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)2 and Cu(Gly-Gly)2 by Using Stopped-flow Method |
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| XIE Ying,JIN Qiu,LI Da-Zhen,GAO Pan-Liang,ZI Jun-Qing.The Kinetics Study on Dismutation of Superoxide Catalyzed by Cu(Ser)2 and Cu(Gly-Gly)2 by Using Stopped-flow Method[J].Chemical Research In Chinese Universities,1998,19(8):1288-1291. | |
| Authors: | XIE Ying JIN Qiu LI Da-Zhen GAO Pan-Liang ZI Jun-Qing |
| Abstract: | In order to estimate the activities of natural SOD and the analogue of SOD on dynamics, the kinetics of Cu(Ser) 2 and Cu(Gly Gly) 2 catalyzed the dismutation of superoxide were studied at pH=7.8 by using stopped flow method. The rate constants k cat , reaction order n , activation energy E a and Arrhenius equation were obtained. the reaction mechanism was probed, and it was proved that the first step of the reaction was the determining step. |
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