A computer simu!ation procedure has been applied to the fluorescence decay curves of pyrenc vapour, excited into the S, s?ate with short laser pulses. The resuits confirm that the kinetic model which has been used previously in order to describe the effect of vibrational redistribution on the fluore
Biphotonic excitation of the fluorescence of benzophenone ketyl
โ Scribed by Michael R. Topp
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 402 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
irradiation of benzophcnone in isopropanol solution results in orange fluorescence, the yield of which depends on the laser pulse duration. This is shown to be due to benzophenone ketyl (hydroxydiphenyl methyl), formed as a photoproduct. It is shown that simple time-resolved fluorescence measurements can yield basic information concerning the early photochemical history of such radical species.
๐ SIMILAR VOLUMES
Fluorcscencc spectra are presented, originstins from upper excited singlet stntcs in three santhene dyes. The cxpcrimentnl method, using biphoknic pulsed laser escitation, is shown to have advantages over sir&-photon ultraviolet irradiation. It is further shown that the observed spectra dcpcnd on th
E\crIatron of a-phr'nylbenzom solutron in accronitrde generates cmissron from thu drphcnyl hclyl radrcll with a Lfctimc oi 3.7 ns Thus IS quenched by methyl methaayhrc andp-chlorobcnzcncdiazonium tctrafluorobontc. The rate constant with dazomum salt is about the umc for Found and exncd radrals, whr