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The local structure of the azobenzene/aniline reaction intermediate on TiO2(110)
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Kreikemeyer-Lorenzo, D., Unterberger, W. (Werner), Duncan, David A., Lerotholi, T. J. and Woodruff, D. P. (2013) The local structure of the azobenzene/aniline reaction intermediate on TiO2(110). Surface Science, Volume 613 . pp. 40-47. doi:10.1016/j.susc.2013.03.009
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Official URL: http://dx.doi.org/10.1016/j.susc.2013.03.009
Abstract
Scanned-energy mode photoelectron diffraction (PhD) and near-edge X-ray absorption fine structure (NEXAFS) have been used to study the surface species, previously proposed to be phenyl imide, C6H5N–, on rutile TiO2(110) following exposure to either azobenzene or aniline. All measurements are consistent with the two reactants forming a common surface species in the same local adsorption site. N K-edge NEXAFS confirms the scission of the Ndouble bond; length as m-dashN bond in azobenzene, while C K-edge NEXAFS shows the phenyl ring to be intact with the molecular plane tilted relative to the surface normal and not aligned in either principle azimuth of the surface. N 1s PhD data indicate that the N atom bonds atop a surface five-fold-coordinated Ti atom, most probably at a Tisingle bondN bondlength of 1.77 ± 0.05 Å, and not bridging two such atoms, as had been suggested. This atop geometry is favoured by recent density functional theory (DFT) calculations, but more quantitative aspects of the DFT result are not in agreement with the conclusions of our experimental study.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QD Chemistry | ||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||
| Library of Congress Subject Headings (LCSH): | Absorption spectra, Titanium dioxide, Azo compounds, Aniline | ||||||||||
| Journal or Publication Title: | Surface Science | ||||||||||
| Publisher: | Elsevier BV | ||||||||||
| ISSN: | 0039-6028 | ||||||||||
| Official Date: | July 2013 | ||||||||||
| Dates: |
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| Volume: | Volume 613 | ||||||||||
| Page Range: | pp. 40-47 | ||||||||||
| DOI: | 10.1016/j.susc.2013.03.009 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Deutsche Forschungsgemeinschaft (DFG) |
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