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Citation: Yu Jia-Kang, Dong Jun-Hua, Cao Chu-Nan, Lin Hai-Chao. SERS and Quantum Chemistry Studies of Adsorption of Thiourea and Ethylthiourea on Silver Electrode[J]. Acta Physico-Chimica Sinica, ;1996, 12(09): 856-860. doi: 10.3866/PKU.WHXB19960917 shu

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

1.
The State Key Laboratory of Corrosion and Protection of Metals,Institute of Corrosion and Protection of Metals,Shenyang 110015

Received Date: 17 February 1996
Available Online: 15 September 1996

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.
- Surface enhanced Raman spectroscopy,
- Adsorption,
- Quantum chemistry,
- Thiourea
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