Adsorption of ethene, propene and 3,3,3-trifluoropropene on oxygen modified Mo(100) surfaces studied by UPS

J. L. Grant; T. B. Fryberger; P. C. Stair

doi:10.1016/0039-6028(90)90624-H

Adsorption of ethene, propene and 3,3,3-trifluoropropene on oxygen modified Mo(100) surfaces studied by UPS

J. L. Grant^*, T. B. Fryberger, P. C. Stair

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Adsorption of ethene, propene and 3,3,3-trifluoropropene on Mo(100) surfaces modified by 0.9-1.1 ML of oxygen was studied by UPS. Ethene and propene molecularly adsorb to oxygen modified Mo(100). The binding energy shift in the π-orbital of both molecules is consistent with bonding by π-electron donation to surface Lewis acid sites. Molecular adsorption of CF₃CHCH₂ produces a π-orbital shift to lower binding energy. This observation along with the calculated electronic structure of CF₃CHCH₂ is interpreted as evidence for a surface chemical bond dominated by backdonation of electrons from the surface to unoccupied π^*-orbitals on the adsorbate.

Original language	English (US)
Pages (from-to)	127-134
Number of pages	8
Journal	Surface Science
Volume	239
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(90)90624-H
State	Published - Dec 1 1990

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Adsorption of ethene, propene and 3,3,3-trifluoropropene on oxygen modified Mo(100) surfaces studied by UPS",

abstract = "Adsorption of ethene, propene and 3,3,3-trifluoropropene on Mo(100) surfaces modified by 0.9-1.1 ML of oxygen was studied by UPS. Ethene and propene molecularly adsorb to oxygen modified Mo(100). The binding energy shift in the π-orbital of both molecules is consistent with bonding by π-electron donation to surface Lewis acid sites. Molecular adsorption of CF3CHCH2 produces a π-orbital shift to lower binding energy. This observation along with the calculated electronic structure of CF3CHCH2 is interpreted as evidence for a surface chemical bond dominated by backdonation of electrons from the surface to unoccupied π*-orbitals on the adsorbate.",

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AU - Grant, J. L.

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AU - Stair, P. C.

PY - 1990/12/1

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N2 - Adsorption of ethene, propene and 3,3,3-trifluoropropene on Mo(100) surfaces modified by 0.9-1.1 ML of oxygen was studied by UPS. Ethene and propene molecularly adsorb to oxygen modified Mo(100). The binding energy shift in the π-orbital of both molecules is consistent with bonding by π-electron donation to surface Lewis acid sites. Molecular adsorption of CF3CHCH2 produces a π-orbital shift to lower binding energy. This observation along with the calculated electronic structure of CF3CHCH2 is interpreted as evidence for a surface chemical bond dominated by backdonation of electrons from the surface to unoccupied π*-orbitals on the adsorbate.

AB - Adsorption of ethene, propene and 3,3,3-trifluoropropene on Mo(100) surfaces modified by 0.9-1.1 ML of oxygen was studied by UPS. Ethene and propene molecularly adsorb to oxygen modified Mo(100). The binding energy shift in the π-orbital of both molecules is consistent with bonding by π-electron donation to surface Lewis acid sites. Molecular adsorption of CF3CHCH2 produces a π-orbital shift to lower binding energy. This observation along with the calculated electronic structure of CF3CHCH2 is interpreted as evidence for a surface chemical bond dominated by backdonation of electrons from the surface to unoccupied π*-orbitals on the adsorbate.

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