کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403721 | 1392765 | 2007 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemiluminescence of fluorescein in alkaline solution at a polycrystalline gold electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The electrochemiluminescence (ECL) behavior of fluorescein at a polycrystalline gold electrode was studied under conventional cyclic voltammetric conditions. Five ECL peaks were observed at 0.94 (ECL-1), 1.51 (ECL-2), 1.34 (ECL-3), â0.06 (ECL-4), â0.73 to â1.11 V (ECL-5, a broad weak wave) (vs. SCE), respectively, on the curve of ECL intensity versus potential. These ECL peaks were found to depend on the pH of the solution, supporting electrolyte, potential scan ranges and directions. The emitter of ECL peaks was identified as fluorescein or eosin Y produced on the electrode by analyzing the ECL spectra and fluorescence spectra. The mechanisms for ECL peaks have been proposed due to the reactions of fluorescein and the electro-oxidation product of fluorescein with various oxygen-containing species in the solution or electrogenerated at different applied potentials such as O2, O2·â, HO2â, and BrOâ. Singlet molecular oxygen was generated during the reactions and transferred its energy to the ECL emitter such as fluorescein or eosin Y, emitting light.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 126, Issue 1, September 2007, Pages 187-195
Journal: Journal of Luminescence - Volume 126, Issue 1, September 2007, Pages 187-195
نویسندگان
Ming-Juan Shi, Hua Cui,