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Surface‐enhanced Raman spectroscopy of 4‐ tert ‐butylpyridine on a silver electrode
Author(s) -
Livingstone Richard,
Lombardi John R.
Publication year - 2011
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.2962
Subject(s) - raman spectroscopy , raman scattering , electrode , chemistry , analytical chemistry (journal) , electrochemistry , excitation , molecule , electrode potential , molecular vibration , surface enhanced raman spectroscopy , adsorption , optics , organic chemistry , physics , electrical engineering , engineering
We report the observation of large surface‐enhanced Raman scattering (SERS) (10 6 ) for 4‐ tert ‐butylpyridine molecules adsorbed on a silver electrode surface in an electrochemical cell with electrode potential set at − 0.5 V. A decrease in electrode potential to − 0.3 V was accompanied by a decrease in relative intensities of the vibrational modes. However, there were no changes in vibrational wavenumbers. Comparison of both normal solution Raman and SERS spectra shows very large enhancement of the intensities of a 1 , a 2 , and b 2 modes at laser excitation of 488 nm. Enhancement of the non‐totally symmetric modes indicates the presence of charge transfer as a contributor to the enhancement. Copyright © 2011 John Wiley & Sons, Ltd.