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Surface-enhanced Raman scattering of 4-nitrothioanisole in Ag Sol

Journal of Physical Chemistry B, ISSN: 1520-6106, Vol: 108, Issue: 41, Page: 16208-16212
2004
  • 24
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  • 23
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Metrics Details

  • Citations
    24
    • Citation Indexes
      24
  • Captures
    23

Article Description

Surface-enhanced Raman scattering (SERS) of 4-nitrothioanisole (4-NTA) is investigated in Ag sol. The molecule is found to adsorb on Ag as 4-NTA via the sulfur atom. Upon irradiation by an argon ion laser at 514.5 nm, the molecule is, however, subjected to two consecutive surface-induced photoreactions, namely C-S bond scission followed by nitro to amine conversion. Accordingly, the SERS spectrum of 4-NTA becomes the same as that of 4-aminobenzenthiolate adsorbed on Ag. Electrochemical analyses of 4-NTA at the Ag electrode combined with SERS measurements in concentrated sodium borohydride also suggest that the C-S bond scission takes place prior to the nitro to amine conversion.

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