[(4) and (5)] quantum yields indicated that reactions of molecular oxygen with diradicals photogeneratedfrom2,4,6-tri-isopropylbenzophenones (3a–e) were accelerated by the presence of both electron-donating (OMe and Me) and electron-withdrawing (Cl and CF3) substituents, this acceleration probably resulted from the zwitterionic nature of the diradicals.
Photochemistry of meta-substituted and para-substituted aromatic polycarbonyl compounds
作者:Yoshikatsu Ito、Nobuhiro Kawatsuki、Brij Pal Giri、Masahiro Yoshida、Teruo Matsuura
DOI:10.1021/jo00216a018
日期:1985.8
Efficiency for solid-state photocyclization of 2,4,6-triisopropylbenzophenones
作者:Yoshikatsu Ito、Teruo Matsuura、Keiichi Fukuyama
DOI:10.1016/0040-4039(88)85092-5
日期:1988.1
Quantum yields for photocydization of 2,4,6-triisopropybenzophenones in the solid state were estimated by using an usual merry-go-round apparatus. The results suggest that the π,π☆ excited state is responsible for the reaction.