Investigation on the 蟺-Dimer/蟽-Dimer of 1,8-Dihydroxy-9,10-anthracenedione in the Process of Electrochemical Reduction by Using IR Spectroelectrochemical Cyclic Voltabsorptometry and Derivative Cyclic

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• 作者：Wang-Xing Cheng ; Bao-Kang Jin ; Peng Huang ; Long-jiu Cheng ; Sheng-Yi Zhang ; Yu-Peng Tian
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：February 28, 2013
• 年：2013
• 卷：117
• 期：8
• 页码：3940-3948
• 全文大小：468K
• 年卷期：v.117,no.8(February 28, 2013)
• ISSN：1932-7455

文摘

The electrochemical reduction of 1,8-dihydroxy-9,10-anthracenedione (Q) has been investigated by cyclic voltammetry (CV). Both 9,10-anthroquinone (AQ) and 1,8-methoxy-9,10-anthracenedione (DMeAQ) are reduced in two steps. First, they are reduced to the anion radical. Next, the anion radicals are reduced to the dianion. However, the CV of Q shows more cathodic and anodic peaks, which suggests the formation of a neutral- anion radical complex. To study the reaction mechanism of Q, in situ infrared (IR) spectroelectrochemistry, IR cyclic voltabsorptometry (CVA), and derivative cyclic voltabsorptometry (DCVA) spectroelectrochemical techniques are used to track the electrochemical reduction process. It is found that Q is reduced to Q^{鈥⑩€?/sup>, then Q鈥⑩€?/sup> reacts with Q to produce dimer Q₂鈥⑩€?/sup>. What鈥檚 more, both the 蟺-dimer and 蟽-dimer can be observed during the electrochemical process by an IR spectroelectrochemical technique. As a result, a new reaction mechanism of Q has been proposed by this powerful approach.}