物理化学学报 >> 1996, Vol. 12 >> Issue (09): 856-860.doi: 10.3866/PKU.WHXB19960917

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硫脲及其衍生物的SERS和量子化学研究

余家康,董俊华,曹楚南,林海潮   

  1. 中国科学院金属腐蚀与防护研究院，金属腐蚀与防护国家重点实验室，沈阳 110015
  • 收稿日期:1996-02-17 修回日期:1996-05-28 发布日期:1996-09-15
  • 通讯作者: 余家康

SERS and Quantum Chemistry Studies of Adsorption of Thiourea and Ethylthiourea on Silver Electrode

Yu Jia-Kang,Dong Jun-Hua,Cao Chu-Nan,Lin Hai-Chao   

  1. The State Key Laboratory of Corrosion and Protection of Metals,Institute of Corrosion and Protection of Metals,Shenyang 110015
  • Received:1996-02-17 Revised:1996-05-28 Published:1996-09-15
  • Contact: Yu Jia-Kang

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关键词: 表面增强拉曼光谱(SERS), 量子化学, 硫脲, 缓蚀剂

Abstract:

Adsorption of thiourea (TU) and ethylthiourea(ETU) on roughened silver electrode was investigated using in- situ surface enhanced Raman spectroscopy(SERS). Using quantum chemistry and HSAB theories, the influences of electrode potential and the different substituent groups on SERS were discussed. TU is chemisorbed perpendicularly by Ag-S bond on silver at E=-0.3 V and adsorption of TU turns into a parallel orientation at E=-0.9 V. ETU is always chemisorbed at an angle from Ag. The adsorption of ETU is through C=C and C=O groups at E=-0.3 V, and mainly through C=C at E=-0.9V.

Key words: Surface enhanced Raman spectroscopy, Adsorption, Quantum chemistry, Thiourea, Inhibitor