Study on the Electrochemical Redox Mechanism of 2-Hydroxy-1,4-naphthoquinone

doi:10.7503/cjcu20121045

Abstract

Abstract:

In situ IR spectroelectrochemistry, cyclic voltabsorptometry(CVA) and derivative cyclic voltabsorptometry(DCVA) techniques were used to study the electron transfer mechanism of 2-hydroxy-1,4-naphthoquinone(2-HNQ) in acetonitrile. When the scan range is from 0.2 V to -1.8 V, the voltammogram of 2-HNQ in acetonitrile shows two couples of anodic and cathodic peaks. When the scan range is from 1.0 V to -2.0 V, there is another anodic peak in cyclic voltammetry(CV) at more positive potential. Tracing the change of some IR absorption peaks during CV scan, there are two kinds of intermediates in the electrochemical process. Radical dianion formed by the reduction process of deprotonated quinine(Q-O^-) continues to reduce, i. e., Q-O^- reduces by an electrochemical reaction-electrochemical reaction mechanism(EE pathway). In addition, it involves the formation of strong hydrogen bonding.

Key words: In situ IR spectroelectrochemistry, Cyclic voltabsorptometry(CVA), Derivative cyclic voltabsorptometry(DCVA), 2-Hydroxy-1,4-naphthoquinone, Intermediate, Hydrogen-bonding

CLC Number:

O646.54

TrendMD:

LI Dan, JIN Bao-Kang. Study on the Electrochemical Redox Mechanism of 2-Hydroxy-1,4-naphthoquinone[J]. Chem. J. Chinese Universities, 2013, 34(8): 1959.

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Study on the Electrochemical Redox Mechanism of 2-Hydroxy-1,4-naphthoquinone

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