INTERPRETATION OF SERS INTENSITY-LEAD COVERAGE PROFILES FOR PYRIDINE AND CHLORIDE ION IN TERMS OF ELECTROMAGNETIC ENHANCEMENT AND CHARGE-TRANSFER EXCITATION.

Anita L. Guy, Jeanne E Pemberton

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The excitation behavior of the quenching of SERS for pyridine and Cl** minus at Ag electrodes in the presence of monolayer and submonolayer amounts of underpotentially deposited Pb is presented in this report. Intensity-coverage profiles are presented for the ring-breathing mode of pyridine with laser excitation. Electromagnetic contributions to the quenching behavior are evaluated by comparison of the experimental quenching profiles with theoretical profiles. Theoretical profiles are calculated from a model which predicts electromagnetic enhancement at overlayer-covered metal ellipsoids. The experimental and theoretical profiles are in poor agreement, especially for excitation in the red-wavelength region. A chemical model based on photoassisted charge transfer is proposed to account for the experimental behavior at other excitation wavelengths.

Original languageEnglish (US)
Pages (from-to)777-785
Number of pages9
JournalLangmuir
Volume3
Issue number5
StatePublished - Sep 1987

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Pyridine
Charge transfer
Chlorides
Quenching
pyridines
Lead
chlorides
charge transfer
Ions
electromagnetism
augmentation
profiles
excitation
quenching
Wavelength
ions
Laser excitation
Laser modes
Monolayers
Metals

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

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title = "INTERPRETATION OF SERS INTENSITY-LEAD COVERAGE PROFILES FOR PYRIDINE AND CHLORIDE ION IN TERMS OF ELECTROMAGNETIC ENHANCEMENT AND CHARGE-TRANSFER EXCITATION.",
abstract = "The excitation behavior of the quenching of SERS for pyridine and Cl** minus at Ag electrodes in the presence of monolayer and submonolayer amounts of underpotentially deposited Pb is presented in this report. Intensity-coverage profiles are presented for the ring-breathing mode of pyridine with laser excitation. Electromagnetic contributions to the quenching behavior are evaluated by comparison of the experimental quenching profiles with theoretical profiles. Theoretical profiles are calculated from a model which predicts electromagnetic enhancement at overlayer-covered metal ellipsoids. The experimental and theoretical profiles are in poor agreement, especially for excitation in the red-wavelength region. A chemical model based on photoassisted charge transfer is proposed to account for the experimental behavior at other excitation wavelengths.",
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N2 - The excitation behavior of the quenching of SERS for pyridine and Cl** minus at Ag electrodes in the presence of monolayer and submonolayer amounts of underpotentially deposited Pb is presented in this report. Intensity-coverage profiles are presented for the ring-breathing mode of pyridine with laser excitation. Electromagnetic contributions to the quenching behavior are evaluated by comparison of the experimental quenching profiles with theoretical profiles. Theoretical profiles are calculated from a model which predicts electromagnetic enhancement at overlayer-covered metal ellipsoids. The experimental and theoretical profiles are in poor agreement, especially for excitation in the red-wavelength region. A chemical model based on photoassisted charge transfer is proposed to account for the experimental behavior at other excitation wavelengths.

AB - The excitation behavior of the quenching of SERS for pyridine and Cl** minus at Ag electrodes in the presence of monolayer and submonolayer amounts of underpotentially deposited Pb is presented in this report. Intensity-coverage profiles are presented for the ring-breathing mode of pyridine with laser excitation. Electromagnetic contributions to the quenching behavior are evaluated by comparison of the experimental quenching profiles with theoretical profiles. Theoretical profiles are calculated from a model which predicts electromagnetic enhancement at overlayer-covered metal ellipsoids. The experimental and theoretical profiles are in poor agreement, especially for excitation in the red-wavelength region. A chemical model based on photoassisted charge transfer is proposed to account for the experimental behavior at other excitation wavelengths.

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