Studies of the electrochemical reduction of 4-nitrophenol in dimethylformamide: evidence for a change in mechanism with temperature

被引:19
作者
Forryan, CL [1 ]
Compton, RG [1 ]
机构
[1] Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England
关键词
D O I
10.1039/b307553m
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The electrochemical reductions of 4-nitrophenol, 2-cyanophenol and 4-cyanophenol were studied in dimethylformamide (DMF) at gold microdisk electrodes at elevated temperatures up to 110 degreesC. It was inferred that there is a change in mechanism for the reduction of 4-nitrophenol near 25 degreesC. Over the entire temperature range 4-nitroplienol is reduced to the corresponding radical anion, with subsequent rapid protonation by the parent molecule to form a radical species. At temperatures above 25 degreesC it appears that this species can undergo further electrochemical reduction at the gold electrode, introducing a new voltammetric reduction wave, contrasting the response observed at platinum.
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收藏
页码:4226 / 4230
页数:5
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