Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (10): 1182-1185.doi: 10.3866/PKU.WHXB20051025

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In-situ SERS of Piperonal and Isosafrole Electrooxidation on Pt Electrode

ZHONG Qi-ling ; ZHANG Xiao-hong; ZHOU Hai-Hui; WEN Zu-biao; YANG Xiong-yuan; HUANG Peng; REN Bin; TIAN Zhong-qun   

  1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330027; 1School of Chemistry and Material Science, Wenzhou Normal College, Wenzhou 325027; 2State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005
  • Received:2005-02-02 Revised:2005-05-09 Published:2005-10-15
  • Contact: ZHONG Qi-ling

Abstract: The electrooxidation behavior of piperonal (PI) and isosafrole (ISF) on roughened platinum in non-aqueous system was investigated by cyclic voltammogram (CV) and in-situ surface enhanced raman scattering (SERS) spectroscopy. On the one hand, PI would be oxidated to piperic acid if the potential was equal to 1.50 V or higher than 1.50 V. On the other hand, the in- situ SERS results demonatrated that the exciting laser of 632.8 nm promoted the electrooxidation of PI at the oxidation potential (≥1.50 V). As a result, the potential, which was used to directly oxidate ISF to PI should be controlled between 1.20 V and 1.50 V.

Key words: Cyclic voltammogram, Piperonal, Isosafrole, Electrooxidation, SERS