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Investigation of the adsorption of 2‐phenyl‐1‐ethanethiol on silver by Raman spectroscopy
Author(s) -
Mi Lee Hwa,
Kim Kwan,
Kim Myung Soo
Publication year - 1993
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250241005
Subject(s) - ethanethiol , conformational isomerism , monolayer , chemistry , raman spectroscopy , molecule , adsorption , borohydride , raman scattering , photochemistry , crystallography , organic chemistry , catalysis , biochemistry , physics , optics
Surface‐enhanced Raman scattering (SERS) of 2‐phenyl‐1‐ethanethiol was investigated in a silver sol. The molecule was found to be chemisorbed dissociatively on the silver surface by rupture of its SH bond. Although both the trans and gauche conformers around the C‐1C‐2 axis could exist on the surface with submonolayer coverage, the trans conformer seemed to be dominant as the bulk concentration of the molecule was sufficient for full monolayer coverage. In the submonolayer coverage limit, a gradual trans ‐to‐ gauche transition was found to occur on the surface with increase in borohydride concentration in the sol solution. The vibrational assignment of the molecule in the liquid phase was also refined by using the SERS data.