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Fluorescence spectra and lifetimes of chalcone ketyl radical anions

โœ Scribed by Hiroshi Hiratsuka; Tatsuya Yamazaki; Yasuhiko Maekawa; Yoshizumi Kajii; Takumi Hikida; Yuji Mori

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
334 KB
Volume
139
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Fluorescence spectra and lifetimes have been measured at 77 K for the chalcone ketyl radical anion, and its hydroxy and methoxy derivatives. The radical anions were produced by y-irradiation of sample molecules at 77 K in alkaline polyvinyl alcohol films and in EPA rigid glasses with set-butylamine, followed by thermal bleaching (annihilation reactions of various unstable species at an elevated temperature). Fluorescence lifetimes of these radical anions (1.6-3.1 ns) were only slightly shorter than those of the corresponding ketyl radicals (3.1-5.5 ns).

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