摘要
本文主要介绍了醛类共还原体系和卟啉类、酞菁类、席夫碱类过渡金属仿生催化体系对分子氧的活化机理及在烯烃环氧化中的应用研究。醛类共还原体系的活性中心为过氧自由基,而卟啉类、酞菁类、席夫碱类过渡金属仿生催化剂与分子氧络合后将配位双氧变为超氧型或过氧型,酞菁还可作为光敏剂,在可见光激发下,与氧气分子发生能量转移,产生单线态氧。
The configuration of molecular oxygen and its application in epoxidation of olefins are introduced.The activation mechanism of molecular oxygen by aldehydes as co-reductant and transition metallic biomimetic catalytic systems of porphyrins,phthalocyanines and Schiff bases are summarized,respectively.Free peroxy radical is the reactive intermediate in the aldehydes reduction system,porphyrins,phthalocyanines and Schiff bases can activate molecular oxygen to the reactive free radical,such as superoxide and peroxide.The active singlet oxygen can be produced via energy transfer from phthalocyanine＇ s excited states to molecular oxygen during photo-sensitization processes.
出处
《化学通报》
CAS
CSCD
北大核心
2013年第1期46-51,共6页
Chemistry
基金
上海市教委重点学科建设基金项目(J51503)
上海市大学生科创基金项目(PE2012076)
上海应用技术学院科技发展基金项目(KJ2008-08)资助
关键词
分子氧
环氧化
还原剂
卟啉
酞菁
席夫碱
Molecular oxygen
Epoxidation
Co-reductant
Porphyrin
Phthalocyanine
Schiff base
