Photoelectrochemistry on TiO2/Ti anodes as a tool to increase the knowledge about some photo-oxidation mechanisms in CH3CN

被引：16
|
作者：
Bettoni, Marta [1 ]
Rol, Cesare [2 ]
Sebastiani, Giovanni V. [1 ]
机构：
[1] Univ Perugia, Dipartimento Ingn Civile Ambientale, I-06125 Perugia, Italy
[2] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy
来源：
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY | 2008年 / 21卷 / 03期
关键词：
TiO2; photoelectrochemistry; current efficiency; oxidation; radical cation;
D O I：
10.1002/poc.1303
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
Through current efficiency measurements, obtained from the photoelectrochemical oxidation at TiO2 (rutile)/Ti anodes, further mechanistic information has been obtained regarding the TiO2 photosensitized oxidation of benzylic alcohols, ethers and 1,2-diols in CH3CN. In deaerated medium, two electrons are captured by the semiconductor from all the considered substrates (one from the substrate, the second from the intermediate benzylic radical). In contrast, in aerated CH3CN, the number of TiO2-captured electrons can be reduced to one because, depending on its oxidizability, the benzylic radical can be competitively captured by oxygen. Copyright (c) 2008 John Wiley & Sons, Ltd.
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收藏
页码：219 / 224
页数：6
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