Electrochemical and SERS spectroscopic investigations of 4-methyl-4H-1,2,4-triazole-3-thiol monolayers self-assembled on copper surface
| Autor: | Ying-Ying Wang, Rui Zhang, Ying Wen, Zongrang Zhang, Ying-Cheng Pan, Haifeng Yang |
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| Rok vydání: | 2012 |
| Předmět: |
Chemistry
Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Self-assembled monolayer Surfaces and Interfaces General Chemistry Condensed Matter Physics Photochemistry Electrochemistry Copper Surfaces Coatings and Films Dielectric spectroscopy Adsorption Monolayer Molecule Polarization (electrochemistry) |
| Zdroj: | Applied Surface Science. 258:3956-3961 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2011.12.070 |
| Popis: | Electrochemically anticorrosive behaviors of 4-methyl-4H-1,2,4-triazole-3-thiol (4-MTTL) monolayers self-assembled on copper surface have been investigated by electrochemical impedance spectroscopy (EIS), electrochemical polarization measurement and surface-enhanced Raman scattering (SERS) spectroscopy. The EIS mechanism of the copper surface adsorbed with 4-MTTL monolayers was fitted with the mode of R(QR)(QR)(CR). The electrochemical polarization experimental results indicated the high inhibitive efficiency of about 81.1%. Potential dependent SERS result suggests that 4-MTTL molecule was anchored at the copper surface via S6 and N2 atoms with a tilted orientation, which resulting in a strong interaction between the 4-MTTL molecule and copper surface. The molecule tended to experience a transition state of the adsorption at the copper surface via S6 atom only as the potential applied at −0.5 V vs. SCE. |
| Databáze: | OpenAIRE |
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