Journal
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
Volume 48, Issue 4, Pages 401-411Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1023193512030056
Keywords
surface enhanced Raman spectroscopy; SERS; self-assembled monolayers; SAM; 2-mercaptopyridine
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Funding
- Deutsche Forschungsgemeinschaft [GRK 829/1]
- Fonds der Chemischen Industrie
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Surface enhanced Raman spectroscopy (SERS) was used to investigate the structure of self-assembled monolayers of 2-mercaptopyridine (2Mpy) adsorbed on the surface of a roughened polycrystalline gold electrode from either water or 0.1 M aqueous H2SO4 at different electrode potential values in 0.5 M aqueous H2SO4. A band in the range 215 to 245 cm(-1) assigned to a gold-sulfur stretching mode indicates formation of a sulfur-bonded adsorbate of 2Mpy. There is also evidence that 2Mpy is bonded through the nitrogen atom of the pyridine ring forming a chelate-like structure. Results suggest a perpendicular orientation of 2Mpy on the gold surface.
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