Study on the Electrochemical Redox Mechanism of 2-Hydroxy-1,4-naphthoquinone
Study on the Electrochemical Redox Mechanism of 2-Hydroxy-1,4-naphthoquinone
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2-羟基-1,4-萘醌电化学氧化还原机理研究
DOI：
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发表时间：
2013
期刊：
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通讯作者：
Jin Bao-Kang
中科院分区：
文献类型：
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作者：
Li Dan;Jin Bao-Kang
用原位红外光谱电化学、循环伏安法（CVA）和导数循环伏安法（DCVA）研究了2-羟基-1，4-萘醌（2-HNQ）在乙腈中的电子转移机理.当扫描范围为0.2 ~-1.8V时，2-HNQ在乙腈中的伏安图出现两对阳极峰和阴极峰，当扫描范围为1.0 ~-2.0V时，2-HNQ在乙腈中的伏安图出现两对阳极峰和阴极峰，当扫描范围为1.0 ~-2.0V时，2-HNQ在乙腈中的伏安图出现两对阴极峰，当扫描范围为1.0 ~-2.0V时，2-HNQ在乙腈中的伏安图出现两对阳极峰和阴极峰.循环伏安法（CV）在电位偏正处有另一个阳极峰，跟踪CV扫描过程中部分红外吸收峰的变化，发现电化学过程中存在两种中间体：去质子化奎宁（Q-O-）还原过程中形成的自由基二价阴离子继续还原，即，Q-O-通过电化学反应-电化学反应机理（EE途径）还原，此外，它还涉及到强氢键的形成。
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.