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  Vibrational relaxation of highly vibrationally excited CO scattered from Au(111): Evidence for CO- formation.

Wagner, R. J. V., Henning, N., Krüger, B. C., Park, G. B., Altschäffel, J., Kandratsenka, A., et al. (2017). Vibrational relaxation of highly vibrationally excited CO scattered from Au(111): Evidence for CO- formation. The Journal of Physical Chemistry Letters, 8(19), 4887-4892. doi:10.1021/acs.jpclett.7b02207.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-EEC9-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-121E-5
Genre: Journal Article

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 Creators:
Wagner, R. J. V.1, Author              
Henning, N.1, Author              
Krüger, B. C.1, Author              
Park, G. B.1, Author              
Altschäffel, J.1, Author              
Kandratsenka, A.1, Author              
Wodtke, A. M.1, Author              
Schäfer, T.1, Author              
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1Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society, ou_578600              

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 Abstract: Electronically non-adiabatic dynamics can be important in collisions of molecules at surfaces; for example, when vibrational degrees of freedom of molecules are coupled to electron-hole-pair (EHP) excitation of a metal. Such dynamics have been inferred from a host of observations involving multi-quantum relaxation of NO molecules scattered from metal surfaces. Electron transfer forming transient NO- is thought to be essential to the non-adiabatic coupling. The question remains: is this behavior usual? Here, we present final vibrational state distributions resulting from the scattering of CO(νi = 17) from Au(111), which exhibits significantly less vibrational relaxation than NO(νi = 16). We explain this observation in terms of the lower electron affinity of CO compared to NO, a result that is consistent with the formation of a transient CO- ion being important to CO vibrational relaxation.

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Language(s): eng - English
 Dates: 2017-09-202017-10-05
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.7b02207
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Title: The Journal of Physical Chemistry Letters
Source Genre: Journal
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Pages: - Volume / Issue: 8 (19) Sequence Number: - Start / End Page: 4887 - 4892 Identifier: -