CRCU

Chemical Research in Chinese Universities ›› 2006, Vol. 22 ›› Issue (4): 493-499.

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Electrochemistry of Hydroquinone Derivatives at Metal and Iodine-modified Metal Electrodes

HOU Peng1, HAN Dong-xue1, NIU Li1, LIN Hai-bo2   

  1. 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China;
    2. College of Chemistry, Jilin University, Changchun 130021, P. R. China
  • Received:2005-07-28 Online:2006-08-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(No. 20475053) and Department of Science and Technology of Jilin Province(No.20050102).

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Abstract: The difference in the electrochemical behavior of hydroquinone and pyrocatechol at platinum and gold surfaces was analyzed using voltammetry and attenuated total reflection Fourier transform infrared spectroscopy. The results show that the hydroquinone derivatives are adsorbed on a gold surface with vertical orientation, which makes the electron transfer between the bulk species and the electrode surface easier than that in the case of flat adsorption of hydroquinone derivatives that occurs at a platinum electrode. The formation of the vertical conformation and the rapid process of electron transfer were also confirmed by quantum chemistry calculations. In addition, the pre-adsorbed iodine on the electrodes played a key role on the adsorbed configuration and electron transfer of redox species.

Key words: Hydroquinone derivatives, Iodine-modified, Electrochemistry