Steinrück HP, Fuhrmann T, Papp C, Tränkenschuh B, Denecke R (2006)
Publication Type: Journal article
Publication year: 2006
Original Authors: Steinrück H.-P., Fuhrmann T., Papp C., Tränkenschuh B., Denecke R.
Publisher: American Institute of Physics (AIP)
Book Volume: 125
Article Number: 204706
Journal Issue: 20
DOI: 10.1063/1.2397678
The vibrational fine structure of x-ray photoelectron (XP) spectra of a number of different small hydrocarbon molecules and reaction intermediates adsorbed on Pt(111) and Ni(111) has been investigated in detail. The data for methyl, methylidyne, acetylene, and ethylene can consistently be analyzed within the linear coupling model. The S factor, i.e., the intensity ratio of the first vibrationally excited to the adiabatic transition, is obtained to be 0.17±0.02 per C-H bond; for the deuterated species a value of 0.23±0.02 is obtained. Therefore, the vibrational fine structure can be used for fingerprinting in the analysis of XP spectra and for identifying unknown reaction intermediates. From the data, Δr, the change of the minimum in the potential energy curve upon core ionization, is calculated within the linear coupling model using a first order correction. For all adsorbates, including the deuterated ones, a value of Δr=0.060±0.004 Å is obtained. Furthermore, from the binding energy of the adiabatic peak and from the energy of the vibrational excitation in the ionic final state some information on the adsorbate/substrate bond and the adsorption site can be derived. © 2006 American Institute of Physics.
APA:
Steinrück, H.-P., Fuhrmann, T., Papp, C., Tränkenschuh, B., & Denecke, R. (2006). A detailed analysis of vibrational excitations in x-ray photoelectron spectra of adsorbed small hydrocarbons. Journal of Chemical Physics, 125(20). https://dx.doi.org/10.1063/1.2397678
MLA:
Steinrück, Hans-Peter, et al. "A detailed analysis of vibrational excitations in x-ray photoelectron spectra of adsorbed small hydrocarbons." Journal of Chemical Physics 125.20 (2006).
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