影像科学与光化学 ›› 1990, Vol. 8 ›› Issue (3): 161-170.DOI: 10.7517/j.issn.1674-0475.1990.03.161

• 研究论文 •    下一篇

对二嗪N,N’-二氧化物光还原的电子自旋共振研究

汪汉卿, 林树坤   

  1. 中国科学院兰州化学物理研究所, 兰州 730000
  • 收稿日期:1988-10-26 修回日期:1989-06-09 出版日期:1990-08-20 发布日期:1990-08-20
  • 通讯作者: 汪汉卿
  • 基金资助:
    国家自然科学基金

ELECTRON SPIN RESONANCE STUDIES ON THE RADICALS PRODUCED BY PHOTOREDUCTION OF PARADIAZINE N,N’-DIOXIDES

WANG HAN-QING, LIN SHU-KUN   

  1. Lanzhou Institute of Chemical Physics. Academia Sinica, Lanzhou 730000, P. R. China
  • Received:1988-10-26 Revised:1989-06-09 Online:1990-08-20 Published:1990-08-20

摘要: 报道了利用原位电子自旋共振(ESR)技术研究对二嗪N,N′-二氧化物光解的结果。研究结果表明,化合物5,6,7和8通过光还原过程从溶剂分子夺取氢原子分别生成稳定的自由基,记录出它们分辨良好的ESR谱。文中还讨论了对二嗪N,N′-二氧化物的光化学反应的自由基机理。

关键词: 对二嗪N,N’-二氧化物, 光重排, 光还原脱氧, 夺氢, 自由基机理

Abstract: Electron spin resonance spectroscopic studies were made on the in situ photolyzed samples of four paradiazine N,N’-dioxides prepared.All compounds gave stable nitroxyl radicals,by the photoreduction process,in which these radicals were obtained through abstraction of hydrogen from solvent molecules.Well-resolved ESR s pectra from these radicals were recorded.Also a free radical mechanism for the photoreduction of paradiazine N,N’-dioxides was suggested.

Key words: Paradiazine-N,N’-dioxides, photorearrangement, photoreduction, deoxygenation, hydrogen abstraction, radical mechanism