A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface

B. A. Sexton; N. R. Avery; T. W. Turney

doi:10.1016/0039-6028(83)90342-4

A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface

B. A. Sexton, N. R. Avery, T. W. Turney

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Abstract

Spectroscopic studies of the adsorption of dimethyl sulfoxide, (CH₃)₂S = O, on Pt(111) have shown that the molecule is bound to the surface via the sulfur atom in an inverted pyramid configuration. A comparison of XPS and EELS data for the adsorbed multilayer and monolayer with XPS and infrared data on the complex PtCl₂(DMSO)₂ is consistent with sulfur bonding. In addition, we detect a considerable increase of the v(S=O) frequency in the DMSO monolayer with decreasing coverage, indicating a coverage dependent heat of adsorption. UPS data show that on adsorption to form a monolayer, the highest occupied molecular orbital of DMSO, presumably the sulfur "lone pair" orbital, shifts to a higher binding energy. These results show a remarkable similarity between DMSO bonding to a metal surface and bonding to a single Pt²⁺ species.

Original language	English
Pages (from-to)	162-174
Number of pages	13
Journal	Surface Science
Volume	124
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(83)90342-4
Publication status	Published - 1 Jan 1983
Externally published	Yes

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10.1016/0039-6028(83)90342-4

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title = "A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface",

abstract = "Spectroscopic studies of the adsorption of dimethyl sulfoxide, (CH3)2S = O, on Pt(111) have shown that the molecule is bound to the surface via the sulfur atom in an inverted pyramid configuration. A comparison of XPS and EELS data for the adsorbed multilayer and monolayer with XPS and infrared data on the complex PtCl2(DMSO)2 is consistent with sulfur bonding. In addition, we detect a considerable increase of the v(S=O) frequency in the DMSO monolayer with decreasing coverage, indicating a coverage dependent heat of adsorption. UPS data show that on adsorption to form a monolayer, the highest occupied molecular orbital of DMSO, presumably the sulfur {"}lone pair{"} orbital, shifts to a higher binding energy. These results show a remarkable similarity between DMSO bonding to a metal surface and bonding to a single Pt2+ species.",

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T1 - A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface

AU - Sexton, B. A.

AU - Avery, N. R.

AU - Turney, T. W.

PY - 1983/1/1

Y1 - 1983/1/1

N2 - Spectroscopic studies of the adsorption of dimethyl sulfoxide, (CH3)2S = O, on Pt(111) have shown that the molecule is bound to the surface via the sulfur atom in an inverted pyramid configuration. A comparison of XPS and EELS data for the adsorbed multilayer and monolayer with XPS and infrared data on the complex PtCl2(DMSO)2 is consistent with sulfur bonding. In addition, we detect a considerable increase of the v(S=O) frequency in the DMSO monolayer with decreasing coverage, indicating a coverage dependent heat of adsorption. UPS data show that on adsorption to form a monolayer, the highest occupied molecular orbital of DMSO, presumably the sulfur "lone pair" orbital, shifts to a higher binding energy. These results show a remarkable similarity between DMSO bonding to a metal surface and bonding to a single Pt2+ species.

AB - Spectroscopic studies of the adsorption of dimethyl sulfoxide, (CH3)2S = O, on Pt(111) have shown that the molecule is bound to the surface via the sulfur atom in an inverted pyramid configuration. A comparison of XPS and EELS data for the adsorbed multilayer and monolayer with XPS and infrared data on the complex PtCl2(DMSO)2 is consistent with sulfur bonding. In addition, we detect a considerable increase of the v(S=O) frequency in the DMSO monolayer with decreasing coverage, indicating a coverage dependent heat of adsorption. UPS data show that on adsorption to form a monolayer, the highest occupied molecular orbital of DMSO, presumably the sulfur "lone pair" orbital, shifts to a higher binding energy. These results show a remarkable similarity between DMSO bonding to a metal surface and bonding to a single Pt2+ species.

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A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface

Abstract

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