对二嗪N,N'-二氧化物光还原的电子自旋共振研究

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

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。

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.