Probing the redox process of p-benzoquinone in dimethyl sulphoxide by using fluorescence spectroelectrochemistry

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• 作者：Rui Lu ; Wei Chen ; Wen-Wei Li ; Guo-Ping Sheng…
• 关键词：p ; Benzoquinone ; Electrochemistry ; Fluorescence ; Spectroelectrochemistry ; Derivative cyclic volta fluorescence
• 刊名：Frontiers of Environmental Science & Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：11
• 期：1
• 全文大小：
• 刊物主题：Environment, general;
• 出版者：Higher Education Press
• ISSN：2095-221X
• 卷排序：11

文摘

Quinones are common organic compounds frequently used as model dissolved organic matters in water, and their redox properties are usually characterized by either electrochemical or spectroscopic methods separately. In this work, electrochemical methodology was combined with two fluorescence spectroelectrochemical techniques, cyclic volta- fluorescence spectrometry (CVF) and derivative cyclic volta- fluorescence spectrometry (DCVF), to determine the electrochemical properties of p-benzoquinone in dimethyl sulfoxide, an aprotic solution. The CVF results show that the electrochemical reduction of p-benzoquinone resulted in the formation of radical anion and dianion, which exhibited a lower fluorescence intensity and red-shift of the emission spectra compared to that of p-benzoquinone. The fluorescence intensity was found to vary along with the electrochemical oxidation and reduction of p-benzoquinone. The CVF and DCVF results were in good consistence. Thus, the combined method offers a powerful tool to investigate the electrochemical process of p-benzoquinone and other natural organic compounds.Keywordsp-BenzoquinoneElectrochemistryFluorescenceSpectroelectrochemistryDerivative cyclic volta fluorescenceThese authors contributed equally to this work