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Title: Tertiary amine mediated aerobic oxidation of sulfides into sulfoxides by visible-light photoredox catalysis on TiO2
Authors: Lang, Xianjun
Hao, Wei
Leow, Wan Ru
Li, Shuzhou
Zhao, Jincai
Chen, Xiaodong
Keywords: DRNTU::Engineering::Materials::Functional materials
Issue Date: 2015
Source: Lang, X., Hao, W., Leow, W. R., Li, S., Zhao, J., & Chen, X. (2015). Tertiary amine mediated aerobic oxidation of sulfides into sulfoxides by visible-light photoredox catalysis on TiO2. Chemical Science, 6(8), 5000-5005.
Series/Report no.: Chemical Science
Abstract: The selective oxidation of sulfides into sulfoxides receives much attention due to industrial and biological applications. However, the realization of this reaction with molecular oxygen at room temperature, which is of importance towards green and sustainable chemistry, remains challenging. Herein, we develop a strategy to achieve the aerobic oxidation of sulfides into sulfoxides by exploring the synergy between a tertiary amine and titanium dioxide via visible-light photoredox catalysis. Specifically, titanium dioxide can interact with triethylamine (TEA) to form a visible-light harvesting surface complex, preluding the ensuing selective redox reaction. Moreover, TEA, whose stability was demonstrated by a turnover number of 32, plays a critical role as a redox mediator by shuttling electrons during the oxidation of sulfide. This work suggests that the addition of a redox mediator is highly functional in establishing visible-light-induced reactions via heterogeneous photoredox catalysis.
DOI: 10.1039/C5SC01813G
Schools: School of Materials Science & Engineering 
Rights: © 2015 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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