Thioanisole triplet: Laser flash photolysis and pulse radiolysis studies

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• 作者：Yasser M. Riyad^a ; ^b ; ^c ; ^{yasser_riyad@yahoo.com}
• 关键词：Thioanisole excited triplet state ; Triplet quantum yield ; Triplet lifetime ; Energy transfer ; Laser photolysis ; Pulse radiolysis
• 刊名：Journal of Photochemistry and Photobiology A: Chemistry
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：335
• 期：Complete
• 页码：294-299
• 全文大小：1067 K
• 卷排序：335

文摘

Photoexcitation of thioanisole by 266 nm leads to the generation of short-lived triplet (1.20 μs) and long-lived phenylthiyl radicals (τR ≥ 15 μs). The T1–Tn absorption spectrum of thioanisole is characterized by three bands peaking at 320 nm, 360 nm and 490 nm. Other triplet parameters are: quantum yield = 0.35 and 353 kJ mol−1 > EPhSMe(T1) > 287 kJ mol−1. The sulfur-centered radicals occurs via the S‒Me bond fission of the PhSMe(S1).