H. Hayashi, S. Nagakura
Jun 1, 1980
Citations
0
Influential Citations
18
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The Norrish type II reaction of valerophenone was studied by the ns-laser photolysis technique, the fourth harmonic (266 nm) of a Q-switched Nd: YAG laser being used as an exciting light source. Transient absorptions due to the triplet state and 1,4-biradical of valerophenone were observed in both polar and nonpolar solvents. Quenching experiments with cis-1,3-pentadiene were also carried out. Transient absorptions due to the biradical were observed in the 350–300 nm region with the lifetimes of 103 ns (in methanol), 99 ns (in 2-propanol), 71 ns (in acetonitrile), and 31 ns (in 1,2-dichloroethane). Transient absorptions due to the triplet state were also observed in the 440–300 nm region.