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  Adsorption and switching properties of a N-benzylideneaniline based molecular switch on a Au(111) surface

Óvári, L., Luo, Y., Leyssner, F., Haag, R., Wolf, M., & Tegeder, P. (2010). Adsorption and switching properties of a N-benzylideneaniline based molecular switch on a Au(111) surface. Journal of Chemical Physics, 133(4), 044707–1-044707–8. doi:10.1063/1.3460647.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-F534-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-F535-8
Genre: Journal Article

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 Creators:
Óvári, László, Author
Luo, Ying, Author
Leyssner, Felix, Author
Haag, Rainer, Author
Wolf, Martin1, Author              
Tegeder, Petra, Author
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: tert-butyl-azobenzene; self-assembled monolayers; electronic-structure; thermal-activation; para-nitroaniline; isomerization; light; spectroscopy; spectra; photochemistry
 Abstract: High resolution electron energy loss spectroscopy is employed to analyze the adsorption geometry and the photoisomerization ability of the molecular switch carboxy-benzylideneaniline (CBA) adsorbed on Au(111). CBA adopts on the Au(111) surface a planar (trans) configuration in the first monolayer (ML) as well as for higher coverages (up to 6 ML), contrary to the geometry in solution, which is strongly non-planar. Illumination with UV light of CBA in direct contact with the Au(111) surface (≤ 1 ML) caused no changes in the vibrational structure, whereas at higher coverages ( > 1 ML) pronounced modifications of vibrational features are observed, which we assign to a trans → cis isomerization. Thermal activation induced the back reaction to trans-CBA. We propose that the photoisomerization is driven by a direct (intramolecular) electronic excitation of the adsorbed CBA molecules in the second ML (and above) analogous to CBA in the liquid phase.

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Language(s): eng - English
 Dates: 2010-07-28
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: Journal of Chemical Physics
  Alternative Title : J. Chem. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 133 (4) Sequence Number: - Start / End Page: 044707–1 - 044707–8 Identifier: -