Get access

Surface-enhanced Raman spectroscopy of 4-tert-butylpyridine on a silver electrode

Authors

  • Richard Livingstone,

    Corresponding author
    1. Department of Chemistry and Center for Analysis of Structures and Interfaces (CASI), The City College of New York, New York, NY 10031, USA
    • Department of Chemistry and Center for Analysis of Structures and Interfaces (CASI), The City College of New York, Convent Ave. at 138th Street New York, NY 10031, USA.
    Search for more papers by this author
  • John R. Lombardi

    1. Department of Chemistry and Center for Analysis of Structures and Interfaces (CASI), The City College of New York, New York, NY 10031, USA
    Search for more papers by this author

Abstract

We report the observation of large surface-enhanced Raman scattering (SERS) (106) 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 a1, a2, and b2 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.

Ancillary