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

J. L. Grant, T. B. Fryberger, Peter C Stair

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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 languageEnglish
Pages (from-to)127-134
Number of pages8
JournalSurface Science
Issue number1-2
Publication statusPublished - Dec 1 1990


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

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