LASER INDUCED REACTION OF ELECTRON TRANSFER FROM METHIONINE AND ITS DIPEPTIDES TO TRIPLET 4-NITROQUINOLINE 1-OXIDE

XU Yeping; SONG Qinhua; MA Xingxiao; WANG Wenfeng; YAO Side

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LASER INDUCED REACTION OF ELECTRON TRANSFER FROM METHIONINE AND ITS DIPEPTIDES TO TRIPLET 4-NITROQUINOLINE 1-OXIDE

更新时间：2023-04-07

- LASER INDUCED REACTION OF ELECTRON TRANSFER FROM METHIONINE AND ITS DIPEPTIDES TO TRIPLET 4-NITROQUINOLINE 1-OXIDE
- Journal of Radiation Research and Radiation Processing Vol. 17, Issue 4, Pages: 239-241(1999)
- 作者机构：
  
  1.中国科学技术大学化学物理系　合肥　230026
  2.中国科学院上海原子核研究所辐射化学开放实验室　上海　201800
- 作者简介：
- 基金信息：
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XU Yeping, SONG Qinhua, MA Xingxiao, et al. LASER INDUCED REACTION OF ELECTRON TRANSFER FROM METHIONINE AND ITS DIPEPTIDES TO TRIPLET 4-NITROQUINOLINE 1-OXIDE. [J]. Journal of Radiation Research and Radiation Processing 17(4):239-241(1999)
DOI：

XU Yeping, SONG Qinhua, MA Xingxiao, et al. LASER INDUCED REACTION OF ELECTRON TRANSFER FROM METHIONINE AND ITS DIPEPTIDES TO TRIPLET 4-NITROQUINOLINE 1-OXIDE. [J]. Journal of Radiation Research and Radiation Processing 17(4):239-241(1999) DOI：

摘要

利用纳秒级激光光解瞬态吸收光谱装置，研究了4-硝基喹啉氧化物（4NQO）与含硫氨基酸及其肽的光化学反应。水溶液中的4NQO被248nm激光激发，生成4NQO三重态，并在410nm和590nm观察到它的特征吸收，4NQO激发三重态能被甲硫氨酸及其肽猝灭，其过程是电子转移反应，生成4NQO的加氢自由基和甲硫氨酸及其肽抽氢自由基。

Abstract

Photochemical reactions of 4-nitroquinoline 1-oxide (4NQO) with D-methionine (Met) and its dipeptides have been studied by using 248nm laser flash photolysis technique. Triplet state of 4NQO can be quenched by Met and its dipeptides, and produce radicals via electron transfer between triplet excited state of 4NQO and Met-containing compounds.

关键词

4-硝基喹啉氧化物激光光解电子转移激发三重态

Keywords

4NQOLaser flash photolysisElectron transferExcited triplet state

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