R. Berger, D. Weir
Jun 1, 1990
Citations
0
Influential Citations
4
Citations
Journal
Chemical Physics Letters
Abstract
Abstract The alcohol 9-phenylxanthen-9-ol ( I ) was adsorbed on silica gel and alumina surfaces. Under room temperature conditions the 9-phenylxanthenyl cation ( II ) was formed and stabilized on silica gel. Steady state fluorescence studies show II fluoresces with λ max = 510 nm and that this luminescence occurs via both direct excitation of II as well as adiabatic dehydroxylation of the excited singlet of I . Time-resolved experiments show II has a fluorescence lifetime on silica gel of 37 ± 2 ns and is quenched by oxygen at a rate of 1.5 × 10 4 Torr -1 s -1 .