醛类的光分解与光氧化初级过程的ESR研究 取代苯甲醛的研究

波谱学杂志 ›› 1986, Vol. 3 ›› Issue (4): 339-344.

醛类的光分解与光氧化初级过程的ESR研究取代苯甲醛的研究

陈德文, 周建威, 徐广智

中国科学院化学研究所, 北京

收稿日期:1986-03-18 出版日期:1986-12-05 发布日期:2018-01-23
基金资助:
国家自然科学基金会资助

ESR STUDY ON THE PRIMARY PROCESSES IN THE UV PEOTOLYSIS AND PHOTOOXIDATION OF ALDEHYDES. A STUDY FOR SUBSTITUTED BENZALDEHYDES

Chen Dewen, Zhou Jianwei, Xu Guangzhi

Institute of Chemistry, Academia Sinica, Beijing

Received:1986-03-18 Online:1986-12-05 Published:2018-01-23

摘要/Abstract

摘要： 本文采用自由基捕捉技术与ESR相结合的方法,研究了14种芳香醛的紫外光解及光氧化的初过程,结果表明:
1.10种取代芳香醛的光解中主要活性自由基为芳酰基ϕĊO。
2.光氧化初级过程(即引发过程)与光解所产生之自由基相同。但光氧化中自由基积累速度比光解为快,因此肯定由于氧参与了自由基的引发,从而加速其进程。
3.有羟基取代的芳香醛,未检出自由基。

Abstract: The primary processes in UV photolysis and photooxidatiou of 14 aromatic aldehydes have been studied by the combinatiou of spin trapping technique and ESR spectroscopy. The results show that:
1. The main active intermediates in photolysis of 10 substituted aromatic aldehydes are aromatic amido radicals ϕĊO.
2. Active radicals formed in the primary processes of photooxidation are the same as those formeb in the photolysis processes, and accumulation rates of free radicals in photooxidation are faster than those in photlysis. So it is sure that the formation of free radicals are accelerated owing to the hydrogen abstraction from aldehydes by oxygen.
3. No active radicals have been detected for OH substituted aromatic aldehydes.

陈德文, 周建威, 徐广智. 醛类的光分解与光氧化初级过程的ESR研究取代苯甲醛的研究[J]. 波谱学杂志, 1986, 3(4): 339-344.

Chen Dewen, Zhou Jianwei, Xu Guangzhi. ESR STUDY ON THE PRIMARY PROCESSES IN THE UV PEOTOLYSIS AND PHOTOOXIDATION OF ALDEHYDES. A STUDY FOR SUBSTITUTED BENZALDEHYDES[J]. Chinese Journal of Magnetic Resonance, 1986, 3(4): 339-344.