作者:Detlev Leopold、Hanns Fischer
DOI:10.1039/p29920000513
日期:——
Free radical reactions induced by photolysis of 2,2-dialkyl-2-alkylaminoacetophenone photocuring agents have been studied by continuous wave (CW) and time-resolved EPR spectroscopy. In all solvents alpha-cleavage from the triplet state is the major process. In hydrogen donor solvents it is accompanied by photoreduction followed by a rapid amine elimination from the ketyl radical intermediate. The benzoyl and alpha-aminoalkyl radicals resulting from alpha-cleavage readily add to acrylonitrile whereas radicals formed by photoreduction do not.