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Surface‐enhanced Raman spectra of thiourea in acidic solutions
Author(s) -
Kim Hyeongon,
Kim JongJean
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.1250240204
Subject(s) - thiourea , raman scattering , chemistry , adsorption , raman spectroscopy , protonation , inorganic chemistry , organic chemistry , ion , optics , physics
Surface‐enhanced Raman scattering (SERS) of thiourea [SC(NH 2 ) 2 ] was studied in acidic solutions of 0.1 M H 2 SO 4 and 0.1 M HCl. Very strong SERS bands of thiourea were observed in the acidic solutions, in contrast to very weak SERS spectra of thiourea in standard SERS solutions employing K 2 SO 4 or KCl. Thiourea seems to have a strong and stable surface adsorption at a silver electrode in the acidic solutions where protonation and anionic co‐adsorption may enhance this surface stability of thiourea.