Surface Raman scattering of interfaces at Ag electrodes emersed from dimethylsulfoxide: Spectroscopic evidence for an emersion-induced potential shift

Aijin Shen, Jeanne E Pemberton

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17 Citations (Scopus)

Abstract

Surface Raman scattering has been used to study Ag electrodes emersed from LiBr solutions of dimethylsulfoxide (DMSO). Interfacial DMSO structure is generally similar to that in-situ, although spectral evidence for an emersion-induced potential shift is observed. The DMSO orientation at Ag electrodes is driven by interaction of the oxygen atom at potentials positive of the potential of zero charge (pzc) and the sulfur atom at potentials negative of the pzc. Pronounced restructuring of DMSO occurs in the vicinity of the pzc. Specific interactions between DMSO and electrolyte ions are clearly detected in the emersed interface. The observed potential shift is attributed to reorientation of the DMSO solvent dipoles at the emersed layer

Original languageEnglish (US)
Pages (from-to)32-42
Number of pages11
JournalJournal of Electroanalytical Chemistry
Volume479
Issue number2
StatePublished - Dec 22 1999

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Dimethyl Sulfoxide
Raman scattering
Atoms
Electrodes
Sulfur
Electrolytes
Oxygen
Ions

Keywords

  • Emersed electrochemical interface
  • Non-aqueous solutions
  • Surface enhanced Raman scattering

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

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abstract = "Surface Raman scattering has been used to study Ag electrodes emersed from LiBr solutions of dimethylsulfoxide (DMSO). Interfacial DMSO structure is generally similar to that in-situ, although spectral evidence for an emersion-induced potential shift is observed. The DMSO orientation at Ag electrodes is driven by interaction of the oxygen atom at potentials positive of the potential of zero charge (pzc) and the sulfur atom at potentials negative of the pzc. Pronounced restructuring of DMSO occurs in the vicinity of the pzc. Specific interactions between DMSO and electrolyte ions are clearly detected in the emersed interface. The observed potential shift is attributed to reorientation of the DMSO solvent dipoles at the emersed layer",
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T1 - Surface Raman scattering of interfaces at Ag electrodes emersed from dimethylsulfoxide

T2 - Spectroscopic evidence for an emersion-induced potential shift

AU - Shen, Aijin

AU - Pemberton, Jeanne E

PY - 1999/12/22

Y1 - 1999/12/22

N2 - Surface Raman scattering has been used to study Ag electrodes emersed from LiBr solutions of dimethylsulfoxide (DMSO). Interfacial DMSO structure is generally similar to that in-situ, although spectral evidence for an emersion-induced potential shift is observed. The DMSO orientation at Ag electrodes is driven by interaction of the oxygen atom at potentials positive of the potential of zero charge (pzc) and the sulfur atom at potentials negative of the pzc. Pronounced restructuring of DMSO occurs in the vicinity of the pzc. Specific interactions between DMSO and electrolyte ions are clearly detected in the emersed interface. The observed potential shift is attributed to reorientation of the DMSO solvent dipoles at the emersed layer

AB - Surface Raman scattering has been used to study Ag electrodes emersed from LiBr solutions of dimethylsulfoxide (DMSO). Interfacial DMSO structure is generally similar to that in-situ, although spectral evidence for an emersion-induced potential shift is observed. The DMSO orientation at Ag electrodes is driven by interaction of the oxygen atom at potentials positive of the potential of zero charge (pzc) and the sulfur atom at potentials negative of the pzc. Pronounced restructuring of DMSO occurs in the vicinity of the pzc. Specific interactions between DMSO and electrolyte ions are clearly detected in the emersed interface. The observed potential shift is attributed to reorientation of the DMSO solvent dipoles at the emersed layer

KW - Emersed electrochemical interface

KW - Non-aqueous solutions

KW - Surface enhanced Raman scattering

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