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  Linear dichroism in X-ray absorption spectroscopy of strongly chemisorbed planar molecules: role of adsorption induced rehybridisations

Mainka, C., Bagus, P., Schertel, A., Strunskus, T., Grunze, M., & Wöll, C. (1995). Linear dichroism in X-ray absorption spectroscopy of strongly chemisorbed planar molecules: role of adsorption induced rehybridisations. Surface Science, 341(3), L1055-L1060. doi:10.1016/0039-6028(95)00795-4.

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SurfaceSci_341_1995_L1055.pdf (Any fulltext), 525KB
 
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 Creators:
Mainka, C., Author
Bagus, P.S., Author
Schertel, A., Author
Strunskus, T., Author
Grunze, M.1, Author           
Wöll, Ch., Author
Affiliations:
1Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_2364731              

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Free keywords: Benzene ; Chemisorption ; Near edge extended X-ray absorption fine structure (NEXAFS) ; Platinum ; PMDA
 Abstract: Dipole selection rules require the π*-resonances, which dominate X-ray absorption spectra for planar aromatic molecules, to have zero intensity for X-ray photons linearly polarized in the molecular plane. For molecules adsorbed in a flat geometry on metal surfaces, however, very often considerable intensities are observed for s-polarized light. We will present experimental and theoretical evidence that for two molecules, benzene and pyromellitic dianhydride (PMDA) adsorbed on Pt(111), this anomalously weak linear dichroism is not due to molecular disorder as assumed previously but arises from molecular rehybridisation caused by out-of-plane molecular distortions.

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Language(s): eng - English
 Dates: 1995-05-251995-06-271995-11-10
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0039-6028(95)00795-4
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 341 (3) Sequence Number: - Start / End Page: L1055 - L1060 Identifier: Other: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028