The potential-resolved electrochemiluminescent behavior of calcein in aqueous alkaline solutions at a glassy carbon electrode

被引：5
|
作者：
Zhu, Yinggui [1 ,2 ]
Li, Liusan [1 ]
Qi, Hongling [1 ]
Zhao, Boying [1 ]
Zhao, Guangchao [1 ,2 ]
机构：
[1] Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China
[2] Anhui Key Lab Chemo Biosensing, Wuhu 241000, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2008年 / 53卷 / 16期
基金：
中国国家自然科学基金;
关键词：
calcein; potential-resolved; electrochemiluminescence; light emission; cyclic voltammogram;
D O I：
10.1016/j.electacta.2008.02.078
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In aqueous alkaline solutions, the potential-resolved electrochemiluminescent (ECL) behavior of calcein at a glassy carbon electrode was investigated. A sharp ECL light emission peak appeared near 0.8V (vs. Ag/AgCl) under cyclic voltammogram (CV) conditions. In order to obtain a better understanding of the light emission, we investigated the effects of supporting electrolytes, the pH value, the presence of O-2 or N-2, and the concentration of calcein. The oxidative form of calcein reacted with hydroxyl radicals and oxygen, producing singlet excited oxygen that was identified as the emitter using the ECL, UV-vis absorption and fluorescence spectra. A possible mechanism for the behavior of calcein in this system was also proposed. (c) 2008 Elsevier Ltd. All rights reserved.
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页码：5451 / 5455
页数：5
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