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题名: Visible-Light-Induced Photoredox Catalysis of Dye-Sensitized Titanium Dioxide: Selective Aerobic Oxidation of Organic Sulfides
作者: Lang, Xianjun1; Zhao, Jincai2; Chen, Xiaodong1
关键词: aerobic oxidation ; photoredox catalysis ; redox meditor ; sulfoxides ; visible light
刊名: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
发表日期: 2016-04-04
卷: 55, 期:15, 页:4697-4700
收录类别: SCI
英文摘要: TiO2 photoredox catalysis has recently attracted much interest for use in performing challenging organic transformations under mild reaction conditions. However, the reaction scheme is hampered by the fact that TiO2 can only be excited by UV light of wavelengths shorter than 385nm. One promising strategy to overcome this issue is to anchor an organic, preferably metal-free dye onto the surface of TiO2. Importantly, we observed that the introduction of a catalytic amount of the redox mediator TEMPO [(2,2,6,6-tetramethylpiperidin-1-yl)oxyl] ensured the stability of the anchored dye, alizarin redS, thereby resulting in the selective oxidation of organic sulfides with O-2. This result affirms the essential role of the redox mediator in enabling the organic transformations by visible-light photoredox catalysis.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35975
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Photochem, Beijing 100190, Peoples R China
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