Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (9): 2025.doi: 10.7503/cjcu20180132

• Physical Chemistry • Previous Articles     Next Articles

Study on Redox Mechanism of 2-Methyl-naphthoquinonein Dimethyl Sulfoxide and Acetonitrile

ZHU Yun, LI Dan, JIN Baokang*()   

  1. School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
  • Received:2018-02-12 Online:2018-09-07 Published:2018-05-07
  • Contact: JIN Baokang E-mail:bkjinhf@aliyun.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21175001, 21375001).

Abstract:

The electrochemical characteristics of 2-methyl-naphthoquinone(MQ) was investigated in dimethyl sulfoxide(DMSO) and acetonitrile by cyclic voltammetry(CV) and in-situ Fourier transform infrared(FTIR) spectroelectrochemistry. The electrochemical performance of MQ is distinct in different solvent when the scan range was from 0 V to -1.8 V. The results of cyclic voltabsorptometry(CVA), derivative cyclic voltabsorptometry(DCVA) and high-temperature CV indicated MQ is reduced to anionic radical MQ·- firstly in DMSO, and then converted to dianion MQ2- , which was two-step one-electron transfering process. Nevertheless, MQ in acetonitrile dimerization took place accompanied by electrochemical reduction, in which anionic radical MQ·- and dianion MQ2- formed the dimer and further ruduced at more negative potential.

Key words: 2-Methyl-naphthoquinone, in-situ IR spectroelectrochemistry, Cyclic voltabsorptometry, Derivative cyclic voltabsorptometry, Variable-temperature electrochemistry

CLC Number: 

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