Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (10): 1117-1121.doi: 10.3866/PKU.WHXB20051011

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Study on the Interaction of 2,2′-bipyridine and Zn Electrode by Surface-enhanced Raman Spectroscopy

GU Renao; SHEN Xiao-ying; WANG Mei   

  1. Department of Chemistry, Suzhou University, Suzhou 215006
  • Received:2005-03-07 Revised:2005-05-08 Published:2005-10-15
  • Contact: GU Ren-ao

Abstract: Surface enhanced Raman spectroscopy (SERS) was employed to study the adsorption of 2,2′-bipyridine(2,2′-biPy) on an electrochemical roughened Zn electrode. The results suggested that 2,2′-biPy adsorbed on Zn electrode with relatively strong interaction. For a relative positive initial potential, the potential of the 2,2′-biPy adsorption was negatively moved because of the adsorption of Zinc oxide species, while at a relative negative potential, the adsorption of 2,2′-biPy blocked the adsorption of oxygen species, and thus the 2,2′-biPy and oxygen species exhibited a competitive adsorption on Zn electrode. Moreover, the adsorption configuration of 2,2′-biPy was dependent on the applied potential. It was adsorbed through cis conformation to the surface at -1.3 V, while through trans conformation at -1.4 V.

Key words: Zn electrode, 2,2′-bipyridine, Surface enhanced Raman spectroscopy, Adsorption, Conformational transition