摘要
由缺电子光敏剂所引起的电子转移(ET)光氧化反应目前已受到广泛注意.然而,对于容易发生单线态氧(O)反应的稠环烯烃能否在氰基蒽敏化下发生ET光氧化仍研究甚少.最近作者报道了氰基蒽敏化的9-苯甲叉芴的ET光氧化过程.本文首次探讨了非交替稠环烃,苊烯(AN),在9,10-二氰蒽(DCA)或9-氰基蒽(CNA)敏化下的光氧化反应及其机理. Takeshita等不久前报道,AN受玫瑰红(RB)敏化生成的O反应产物为顺或反式
The photooxidation of acenaphthylene(AN)sensitized by 9,10-dicyanoanthracene(DCA)or 9-cyanoanthracene(CNA)in acetonitrile was shown to give carbonyl-containing derivatives 1-4(Scheme 1 in Chinese Text).It was found that the reaction proceeded in a stepwise manner and the dimerization of AN competed the photooxidation.An electron-transfer(ET)mechanism which involves two-step ET was employed to account for the titled reaction(Scheme 2).It was shown that biphenyl(BP)could considerablly enhance the above photooxidation.The behavior of BP corresponds to inserting a ET relay chain in the initial DCA-sensitized chains(Scheme 3).
出处
《化学学报》
SCIE
CAS
1988年第1期96-98,共3页
Acta Chimica Sinica
基金
中国科学院科学基金资助的课题