Evidence of phenoxymethyl radical formation in laser photolyses of anisole in solution

Transient absorption spectrum of anisole in acetonitrile was observed by a 248-nm laser photolysis. In addition to the structured band observed at 400 nm, which was assigned to phenoxyl radical, a broad absorption band appeared at around 440 nm. The lifetime of the unknown species was not affected b...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2005-09, Vol.174 (3), p.194-198
Main Authors: Ando, Mayaka, Yoshiike, Shigeru, Suzuki, Tadashi, Ichimura, Teijiro, Okutsu, Tetsuo, Ueda, Minoru, Horiuchi, Hiroaki, Hiratsuka, Hiroshi, Kawai, Akio, Shibuya, Kazuhiko
Format: Article
Language:English
Subjects:
1,2-Diphenoxyethane
Anisole
ESR
Laser photolysis
Phenoxymethyl radical
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Summary:Transient absorption spectrum of anisole in acetonitrile was observed by a 248-nm laser photolysis. In addition to the structured band observed at 400 nm, which was assigned to phenoxyl radical, a broad absorption band appeared at around 440 nm. The lifetime of the unknown species was not affected by oxygen. By means of acetone photosensitization reaction, photolysis of 1,2-diphenoxyethane, and ESR measurements, it is demonstrated that the transient is phenoxymethyl radical. The formation mechanism of the phenoxymethyl radical is discussed.
ISSN:1010-6030
1873-2666
DOI:10.1016/j.jphotochem.2005.02.010