In situ UV-Vis spectroelectrochemical evidence of an EC mechanism in the electrooxidation of N-methylaniline
In situ UV-Vis spectroelectrochemical evidence of an EC mechanism in the electrooxidation of N-methylaniline
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DOI：
10.1002/bbpc.19971011210
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发表时间：
1997-12-01
期刊：
影响因子：
--
通讯作者：
Holze, R
中科院分区：
文献类型：
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作者：
Malinauskas, A;Holze, R
用原位紫外-可见光谱研究了N-甲基苯胺（NMA）在光学透明电极上的阳极氧化过程。在λ（max）=443 nm处的吸收带归因于在电解过程中形成的中间物种的形成。发现中间体与溶液NF IA反应，形成可溶性聚合物，其在λ（max）=750 nm处显示吸收带。因此，NMA电氧化的EC机制被证实。得出的结论是，在苯胺氮的烷基链的存在下，稳定的中间体，并使其检测通过简单的光谱电化学技术在一分钟的石灰规模。NMA在ITO电极上的阳极氧化，覆盖有一层薄薄的聚苯胺，被发现进行速度比裸电极。NMA和苯胺的共聚被示出进行。
The anodic oxidation of N-methylaniline (NMA) on optically transparent electrodes was studied with in situ UV-Vis spectroscopy. An absorbance band at lambda(max)=443 nm was ascribed to the formation of an intermediate species formed during electrolysis. The intermediate was found to react with solution NF IA, forming a soluble polymer, which shows an absorbance band at lambda(max)=750 nm. Thus, an EC mechanism of NMA electrooxidation was confirmed. It was concluded, that the presence of an alkyl chain at the aniline nitrogen stabilizes the intermediate and enables its detection by simple spectroelectrochemical technique on a minute lime scale. Anodic oxidation of NMA on ITO electrode, covered with a thin layer of polyaniline, was found to proceed faster than on a bare electrode. A copolymerisation of NMA and aniline was showed to proceed.