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化学学报
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化学学报 ›› 1997, Vol. 55 ›› Issue (7): 703-709. 上一篇    下一篇

研究论文

.OH诱导氧化磷酰化甲硫氨酸机理的脉冲辐解研究

储高升;姚思德;张曼维;张志成;王文峰;汪世龙   

  1. 中国科学技术大学应用化学系辐射化学教研室;中国科学院上海原子核研究所;中国科学院辐射化学开放研究实验室
  • 发布日期:1997-07-15

Pulse radiolytic study on mechanism of the .OH radical induced oxidation of phosphorylmethionine in aqueous solution

YAO SIDE;ZHANG MANWEI;ZHANG ZHICHENG;WANG WENFENG;WANG SHILONG   

  • Published:1997-07-15

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776

被引次数

4 | 2

采用脉冲辐解动态吸收光谱研究了.OH自由基诱导N-二异丙基磷酰化甲硫氨酸(NDM)水溶液的氧化过程, 结果表明.OH主要进攻NDM中硫原子, 并形成含硫三电子键NDM2^+[S], 其在480nm处有最大吸收峰, 形成和衰变均呈一级反应, 推导了反应机理,并与.OH自由基诱导氧化甲硫氨酸水溶液机理进行了比较。

关键词: 氧化, 反应机理, 诱导, 脉冲辐解, 羟基自由基, 二异丙基磷酰化甲硫氨酸

The .OH radical induced oxidation process of N-Diisopropyloxy-phosphonylmethionine (NDM) in N2O-saturated aqueous solution has been investigated by pulse radiolysis techniques. It was found that .OH radical attacked the sulfur atom in NDM to produce a sulfur-containing three-electronbonded (NDM2^+[S]) radical cation which showed a characteristic absorption peak at 480nm. The formation and decay rate constants of this transient species have been determined and the reaction mechanisms under identical conditions of NDM and Met have been compared.

Key words: OXIDATION, REACTION MECHANISM, INDUCTION

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