Evidence for carbon-sulfur bond cleavage in spontaneously adsorbed organosulfide-based monolayers at gold
- Ames Lab.-USDOE, IA (United States) Iowa State Univ., Ames, IA (United States)
We have recently described several aspects of the electrode reactions of monolayers formed from alkanethiols and dialkyl disulfides at gold. This paper now discusses the findings and implications of two sets of electrochemical and surface characterization studies viz., X-ray photoelectron (XPS) and infrared reflection (IRS) spectroscopies. The first set of studies characterized monolayers formed at mica-supported Au(111) from dilute (0.1-1 mM) ethanolic solutions of butanethiol (BT) and butyl sulfide (BS/Au). The second set of experiments compared the monolayers formed from an asymmetric aryl sulfide, ethyl phenyl sulfide (PES), and a symmetric aryl sulfide, phenyl sulfide (PS), with those from thiophenol (TP) and ethanethiol (ET). The similarities in the E[sub p] and Q[sub d] values at TP/Au and PS/Au are consistent with the observations and subsequent interpretation of the electrochemical data at BT/Au and BS/Au. That is, the sulfur-gold interactions at TP/Au and PS/Au are effectively indistinguishable. Together, the above findings provide clear evidence for S-C cleavage in monolayers prepared at gold from organosulfides. 19 refs., 2 figs.
- OSTI ID:
- 6617702
- Journal Information:
- Journal of the American Chemical Society; (United States), Vol. 116:25; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ORGANIC SULFUR COMPOUNDS
ADSORPTION
ELECTROCHEMISTRY
THIOLS
CHEMICAL BONDS
ETHANOL
GOLD
INFRARED SPECTRA
LAYERS
MICA
THERMODYNAMICS
VOLTAMETRY
X-RAY SPECTROSCOPY
ALCOHOLS
CHEMISTRY
ELEMENTS
HYDROXY COMPOUNDS
METALS
MINERALS
ORGANIC COMPOUNDS
SILICATE MINERALS
SORPTION
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
400400 - Electrochemistry
400102 - Chemical & Spectral Procedures