Heated Indium Tin Oxide Cell for Studying Ionic Liquid-Mediated Electrochemiluminescence

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• 作者：Lichan Chen ; Yuwu Chi* ; Xiaoxue Zheng ; Yuanjin Zhang ; Guonan Chen*
• 刊名：Analytical Chemistry
• 出版年：2009
• 出版时间：March 15, 2009
• 年：2009
• 卷：81
• 期：6
• 页码：2394-2398
• 全文大小：175K
• 年卷期：v.81,no.6(March 15, 2009)
• ISSN：1520-6882

文摘

A heated indium tin oxide (ITO) electrochemiluminescent (ECL) cell containing an ITO counter electrode, an ITO reference electrode, and a heated ITO working electrode has been fabricated to promote ionic liquid (IL)-mediated ECL reactions and hence improve sensitivities of IL-based ECL sensors. Heating the ITO working electrode was carried out by applying high-frequency ac voltages, and the temperature of the heated ITO working electrode was calibrated by the redox currents of ferrocenemethanol (FcMeOH) in 1-butyl-3-methylimidazolium hexafluorophosphate (BMIPF₆) IL. A significant increase (26 times) in ECL intensity of the luminol−O₂−BMIPF₆ system was observed when heating the ITO working electrode from room temperature to 54 °C. The use of the developed heated ITO ECL cell has been demonstrated to be an important way to improve IL-mediated ECL sensitivity and envisioned to enlarge applications of IL-based ECL sensors.