Evidence of phenoxymethyl radical formation in laser photolyses of anisole in solution
Evidence of phenoxymethyl radical formation in laser photolyses of anisole in solution
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DOI：
10.1016/j.jphotochem.2005.02.010
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发表时间：
2005-09-01
影响因子：
4.3
通讯作者：
Shibuya, K
中科院分区：
文献类型：
--
作者：
Ando, M;Yoshiike, S;Shibuya, K
用248 nm激光光解法研究了苯甲醚在乙腈中的瞬态吸收光谱。除了在400 nm处观察到的结构化吸收带（归属于苯氧基自由基）外，在440 nm附近还出现了一个宽吸收带。未知物种的寿命不受氧气的影响。通过丙酮光敏化反应、1，2-二苯氧乙烷的光解反应和ESR测量，证明了该瞬态反应是苯氧甲基自由基。讨论了苯氧甲基自由基的形成机理。(c)2005 Elsevier B. V.保留所有权利。
Transient absorption spectrum of anisole in acetonitrile was observed by a 248-nm laser photolysis. In addition to the structured band observed at 400nm, which was assigned to phenoxyl radical, a broad absorption band appeared at around 440nm. 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 fori-nation mechanism of the phenoxymethyl radical is discussed. (c) 2005 Elsevier B.V. All rights reserved.