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Excited state kinetics of the π*←n photochemistry of hexafluoroacetone

✍ Scribed by Frank M. Servedio; G. O. Pritchard

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
463 KB
Volume
7
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The π*←n excited state kinetics of hexafluoroacetone are reinvestigated in the presence of a vibrational relaxer and sufficient triplet state quencher so that only the reactions of the electronically excited upper singlet state are examined. From a Stern–Volmer type analysis it is concluded that vibrational relaxation of the initially formed vibrationally and electronically excited upper singlet state is via a multistage collisional mechanism. An activation energy of about 6 kcal/mole is reported for the unimolecular decomposition of the upper singlet state.

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