Effect of hydroxyl and amino groups on electrochemiluminescence activity of tertiary amines at low tris(2,2′-bipyridyl)ruthenium(II) concentrations

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• 作者：Shuang Han ; Wenxin Niu ; Haijuan Li ; Lianzhe Hu ; Yali Yuan ; Guobao Xu
• 关键词：Tris(2 ; 2′ ; -bipyridyl)ruthenium(II) ; Electrochemiluminescence ; Coreactant ; Diamine ; Hydroxyl
• 刊名：Talanta
• 出版年：2010
• 出版时间：15 April 2010
• 年：2010
• 卷：81
• 期：1-2
• 页码：44-47
• 全文大小：424 K

文摘

ECL of several amines containing different numbers of hydroxyl and amino groups was investigated. N-butyldiethanolamine is found to be more effective than 2-(dibutylamino)ethanol at gold and platinum electrodes, and is the most effective coreactant reported until now. Surprisingly, ECL intensities of monoamines, such as 2-(dibutylamino)ethanol and N-butyldiethanolamine, are much stronger than that of diamines including N,N,N′,N′-tetrakis-(2-hydroxyethyl)-ethylenediamine and N,N,N′,N′-tetrakis-(2-hydroxypropyl)ethlenediamine. The striking contrast between ECL signals of the investigated monoamines and diamines may result from more significant side reactions of diamines, such as the intramolecular side reactions between oxidative amine cation radicals and reductive amine free radicals.