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Doublet-doublet fluorescence of benzyl, p-methylbenzyl and p-chlorobenzyl radicals in solution

✍ Scribed by Kunihiro Tokumura; Masahiro Udagawa; Tomomi Ozaki; Michiya Itoh

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 551 KB
Volume: 141
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)85081-9

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✦ Synopsis

The doublet-doublet fluorescence spectra of benzyl, pmethylbenzyl andpchlorobenzyl radicals were detected in the 450-650 nm region upon the double-pulse (248 nm-+308 nm) excitation of corresponding benzyl chlorides in hexane at room temperature. The respective fluorescence lifetimes were determined to be w 1 ns or less (benzyl), 14 ns (pmethylbenzyl) and 81 ns (pchlorobenzyl). Extensively temperature-dependent non-radiative relaxation was confirmed for these benzyl radicals with close-lying lowest doublet excited states.

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