DIRECT OBSERVATION OF RADICAL ION PAIR FROM INTERACTION OF DNA WITH TRIPLET ANTHRAQUNONE-2-SULFONATE

MA Janhua; LIN Wezheng; WANG Wenfeng; YAO Side; LIN Nianyun

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DIRECT OBSERVATION OF RADICAL ION PAIR FROM INTERACTION OF DNA WITH TRIPLET ANTHRAQUNONE-2-SULFONATE

快报 | 更新时间：2023-04-07

- DIRECT OBSERVATION OF RADICAL ION PAIR FROM INTERACTION OF DNA WITH TRIPLET ANTHRAQUNONE-2-SULFONATE
- 辐射研究与辐射工艺学报 Vol. 17, Issue 1, Pages: 52-53(1999)
- 作者机构：
  
  1.中国科学院辐射化学开放实验室上海原子核研究所　上海 201800
- 作者简介：
  
  (1)Author to whom all correspondence should be addressed
- 基金信息：
  
  国家科学技术部与国家自然科学基金资助项目
- DOI：
  CLC：
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MA Janhua, LIN Wezheng, WANG Wenfeng, et al. DIRECT OBSERVATION OF RADICAL ION PAIR FROM INTERACTION OF DNA WITH TRIPLET ANTHRAQUNONE-2-SULFONATE. [J]. 辐射研究与辐射工艺学报 17(1):52-53(1999)
DOI：

MA Janhua, LIN Wezheng, WANG Wenfeng, et al. DIRECT OBSERVATION OF RADICAL ION PAIR FROM INTERACTION OF DNA WITH TRIPLET ANTHRAQUNONE-2-SULFONATE. [J]. 辐射研究与辐射工艺学报 17(1):52-53(1999) DOI：

摘要

平面型光核酸酶激发态通过电子转移光氧化定域损伤DNA的研究已成为当前的一个热门课题. 但是由于直接检测DNA阳离子自由基遇到困难, 所以未能获得光氧化的主要瞬态产物, 阴、阳离子对的瞬态吸收光谱. 中国科学院辐射化学开放实验室在1997年成功地获取了丙酮三重态电子转移光氧化DNA和首次确证DNA阳离子自由基的基础上, 现用激光光解研究了2-磺酸钠蒽醌三重态对DNA四种核苷酸电子转移光氧化生成的阴、阳离子对. 在与光氧化核苷酸生成的阴、阳离子对对比后, 准确地鉴别了DNA阳离子自由基与2-磺酸钠蒽醌阴离子自由基的瞬态吸收光谱. 进而分别研究了它们的生成与衰减动力学.

Abstract

Our previous work dealing with transient laser spectroscopy and kinetics of DNA have offered time resolved evidence for electron transfer modification of DNA at guanine moiety by triplet acetone（Ace*）,[1],. However observation of radical ion pair resulting from electron transfer oxidation of DNA by planar aromatic photonuclease is hampered by the failure of direct observation of radical cation of DNA,[2,3],.

关键词

DNA脱氧核苷酸2 -磺酸蒽醌三重态阴、阳离子自由基对瞬态激光光谱电子转移光氧化

Keywords

DNANucleotideAnthraquinone-2-sulfonate triplet stateRadical ion pairTransient laser spectroscopyElectron transfer oxidation

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