Electrochemiluminescence Sensor Based on Partial Sulfonation of Polystyrene with Carbon Nanotubes
Jing Li, Yuanhong Xu, Hui Wei, Ting Huo, and Erkang Wang*State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Changchun, Jilin 130022 (P. R. China)
Received for review March 29, 2007. Accepted May 14, 2007.
Abstract:
Herein, homogenously partial sulfonation of polystyrene (PSP) was performed. An effective electrochemiluminescence (ECL) sensor based on PSP with carbon nanotube (CNTs) composite film was developed. Cyclic voltammetry and electrochemical impendence spectroscopy were applied to characterize this composite film. The PSP was used as an immobilization matrix to entrap the ECL reagent Ru(bpy)32+ due to the electrostatic interactions between sulfonic acid groups and Ru(bpy)32+ cations. The introduction of CNTs into PSP acted not only as a conducting pathway to accelerate the electron transfer but also as a proper matrix to immobilize Ru(bpy)32+ on the electrode by hydrophobic interaction. Furthermore, the results indicated the ECL intensity produced at this composite film was over 3-fold compared with that of the pure PSP film due to the electrocatalytic activity of the CNTs. Such a sensor was verified by the sensitive determinations of 2-(dibutylamino)ethanol and tripropylamine. 占个沙发，再来欢迎一下！ welcome 恭喜啊
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