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Potential‐dependent SERS profile of orthanilic acid on silver electrode
Author(s) -
Anto P. L.,
Panicker C. Yohannan,
Varghese Hema Tresa,
Philip Daizy
Publication year - 2006
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.1547
Subject(s) - raman scattering , raman spectroscopy , electrode , chemistry , ab initio , analytical chemistry (journal) , electrode potential , molecule , ab initio quantum chemistry methods , molecular physics , electrochemistry , optics , organic chemistry , physics
FT‐IR and FT‐Raman spectra of orthanilic acid were recorded and analyzed. Surface‐enhanced Raman scattering (SERS) spectrum was recorded on a silver electrode surface. The vibrational wavenumbers were computed by the ab initio method using HF/6–31G* basis and they were found to be in good agreement with the experimental values. Potential dependence of the SERS profile was studied. The profile was prominent at electrode potentials of −0.3 and −0.8 V. The selective enhancement of different bands showed a change in orientation of the molecule on the silver surface. Copyright © 2006 John Wiley & Sons, Ltd.