波谱学杂志 ›› 1998, Vol. 15 ›› Issue (6): 507-513.

• 研究论文 • 上一篇    下一篇

茶多酚及其单体结构自由基的ESR研究

李雯1, 郭琼1, 赵保路1, 沈生荣2, 李美芬1, 侯京武1   

  1. 1. 中国科学院生物物理研究所, 北京 100101;
    2. 渐江农业大学茶学系, 杭州 300001
  • 收稿日期:1998-06-29 修回日期:1998-09-07 出版日期:1998-12-05 发布日期:2018-01-17
  • 作者简介:李雯,女,24岁,研究生
  • 基金资助:
    国家自然科学基金资助项目

ESR SPECTROSCOPY STRUCTURAL ANALYSISOF THE SEMIQUINONE FREE RADICALSOF GREEN TEA POLYPHENOLSAND THEIR COMPONENTS

Li Wen1, Guo Qiong1, Zhao Baolu1, Shen Shengrong2, Hou Jingwu1, Xin Wenjuan1   

  1. 1. Institute of Biophysics, Academia Sinica, Beijing 100101;
    2. Department of Tea, Zhejiang Agricultural University, Hangzhou 300001
  • Received:1998-06-29 Revised:1998-09-07 Online:1998-12-05 Published:2018-01-17

摘要: 通过ESR检测方法研究了邻苯三酚、茶多酚及其四种单体的自氧化醌类自由基的ESR波谱信号,系统阐明了这几种物质的内在结构联系.

关键词: 茶多酚, 自由基, ESR

Abstract: Green Tea Polyphenols(GTP) consist of four components, EGCG(-)-epigallocatechin gallate, ECG(-)-epicatechin gallate, EGC(-)epigallocatechin, and EC(-)epicatechin, all of which have the structure of gallate group or pyrogallol group.In alkaline solution, they will be autooxidized to produce different semiquinone free radicals.We investigated the ESR spectroscopy of the pyrogallol GTP, and the four components of GTP respectively, analyzed the possible structure of responsible semiquinone free radical.The ESR signals of the four components are related to the simple unit of pyrogallol, and the ESR signals of GTP are related to their four components according to their respective quantity attribution.

Key words: Green tea polyphenols, Semiquinone free radicals, ESR spectroscopy