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The laser versus the lamp: Reactivity of the diphenyl ketyl radical in the ground and excited states

✍ Scribed by H. Baumann; C. Merckel; H.-J. Timpe; A. Graness; J. Kleinschmidt; I.R. Gould; N.J. Turro

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 442 KB
Volume: 103
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)85285-9

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✦ Synopsis

The diphenyl ketyl radical which is formed upon photolysis of a-phenyl benzoin is produced in its excited state upon intense pulsed laser irradiation. Using the techniques of time-resolved absorption and emission spectroscopy, reaction rate constants for the ground and excited states of this radical were obtained. For the radical quenchers employed, the excited state reactivity is found to be typically several orders of magnitude greater than that of the sound state. It is concluded that the excited state of diphenyl ketyl radical reacts predominantly by electron transfer processes.

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