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Photostationary and Transient Studies of the Phosphorescence from the Benzil-Anisole System. Direct Evidence for Reversible Exciplex Formation.

ADA051593

Publication Date	1977
Personal Author	Brown, R. E.; Fang, T. S.; Kwan, C. L.; Singer, L. A.
Page Count	5
Abstract	Photostationary (quantum yields) and transient (emission decays) studies of the benzil phosphorescence in cyclohexane in the presence of anisole indicate reversible exciplex formation (E) between the benzil triplet and anisole with radiative decay occurring from E as well as the benzil triplet. Values of kinetic parameters independently derived from the two experiments agree within < 20%. Both sets of experimental data were computer simulated with a common set of parameters with standard deviations < 10%. While the simulations were insensitive to the absolute values of the rate constants for exciplex formation (k1) and dissociation (k2), the ratio k1/k2 is approx. 1/0.3 M. (Author)
Keywords	Phosphorescence Phenyl radicals Ketones Anisole Quantum chemistry Emission Decay Cyclohexanes Reprints Computerized simulation Benzil Exciplex formation
Source Agency	Non Paid Reprints
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	University of Southern California Los Angeles Dept of Chemistry
Document Type	Journal Article
NTIS Issue Number	197812

Photostationary and Transient Studies of the Phosphorescence from the Benzil-Anisole System. Direct Evidence for Reversible Exciplex Formation.

Photostationary and Transient Studies of the Phosphorescence from the Benzil-Anisole System. Direct Evidence for Reversible Exciplex Formation.
ADA051593

Publication Date	1977
Personal Author	Brown, R. E.; Fang, T. S.; Kwan, C. L.; Singer, L. A.
Page Count	5
Abstract	Photostationary (quantum yields) and transient (emission decays) studies of the benzil phosphorescence in cyclohexane in the presence of anisole indicate reversible exciplex formation (E) between the benzil triplet and anisole with radiative decay occurring from E as well as the benzil triplet. Values of kinetic parameters independently derived from the two experiments agree within < 20%. Both sets of experimental data were computer simulated with a common set of parameters with standard deviations < 10%. While the simulations were insensitive to the absolute values of the rate constants for exciplex formation (k1) and dissociation (k2), the ratio k1/k2 is approx. 1/0.3 M. (Author)
Keywords	Phosphorescence Phenyl radicals Ketones Anisole Quantum chemistry Emission Decay Cyclohexanes Reprints Computerized simulation Benzil Exciplex formation
Source Agency	Non Paid Reprints
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	University of Southern California Los Angeles Dept of Chemistry
Document Type	Journal Article
NTIS Issue Number	197812