引用本文:
Kui JIAO, Tao YAN G, Zeng Jian WANG. Thin-layer Spectroelectrochemistry of 3, 3',5, 5'-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode[J]. Chinese Chemical Letters,
2005, 16(5): 655-658.
Citation: Kui JIAO, Tao YAN G, Zeng Jian WANG. Thin-layer Spectroelectrochemistry of 3, 3',5, 5'-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode[J]. Chinese Chemical Letters, 2005, 16(5): 655-658.
Citation: Kui JIAO, Tao YAN G, Zeng Jian WANG. Thin-layer Spectroelectrochemistry of 3, 3',5, 5'-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode[J]. Chinese Chemical Letters, 2005, 16(5): 655-658.
Thin-layer Spectroelectrochemistry of 3, 3',5, 5'-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode
摘要:
The electrooxidation behavior of 3, 3' 5, 5'-tetramethylbenzidine(TMB) was investigated using a platinum minigrid optically transparent thin-layer spectroelectrochemical cell. TMB underwent one two-electron electrooxidation process to yield quinonediimine in the pH range from 2.0 to < 4.0, and two consecutive one-electron electrooxidation processes, gave the mediate product free radical of TMB first, then gave the oxidation product quinonediimine in the pH range from 4.0 to < 7.0. In the pH range from 7.0 to 10.0, the electrooxidation of TMB was also one two-electron electrooxidation process to yield an azo compound. The formal potential E0' and the electron transfer number of the electrooxidation of TMB at pH 2.0 and pH 8.4 were determined by spectroelectrochemical techniques.
English
Thin-layer Spectroelectrochemistry of 3, 3',5, 5'-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode
Abstract:
The electrooxidation behavior of 3, 3' 5, 5'-tetramethylbenzidine(TMB) was investigated using a platinum minigrid optically transparent thin-layer spectroelectrochemical cell. TMB underwent one two-electron electrooxidation process to yield quinonediimine in the pH range from 2.0 to < 4.0, and two consecutive one-electron electrooxidation processes, gave the mediate product free radical of TMB first, then gave the oxidation product quinonediimine in the pH range from 4.0 to < 7.0. In the pH range from 7.0 to 10.0, the electrooxidation of TMB was also one two-electron electrooxidation process to yield an azo compound. The formal potential E0' and the electron transfer number of the electrooxidation of TMB at pH 2.0 and pH 8.4 were determined by spectroelectrochemical techniques.
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