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Dynamical steering in an electron transfer surface reaction: Oriented NO(v = 3, 0.08 < E i < 0.89 eV) relaxation in collisions with a Au(111) surface.

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Chen,  L.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Auerbach,  D. J.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Wodtke,  A. M.
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Citation

Bartels, N., Golibrzuch, K., Bartels, C., Chen, L., Auerbach, D. J., Wodtke, A. M., et al. (2014). Dynamical steering in an electron transfer surface reaction: Oriented NO(v = 3, 0.08 < E i < 0.89 eV) relaxation in collisions with a Au(111) surface. The Journal of Chemical Physics, 140(5): 054710. doi:10.1063/1.4863862.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-78DF-5
Abstract
We report measurements of the incidence translational energy dependence of steric effects in collisions of NO(v = 3) molecules with a Au(111) surface using a recently developed technique to orient beams of vibrationally excited NO molecules at incidence energies of translation between 0.08 and 0.89 eV. Incidence orientation dependent vibrational state distributions of scattered molecules are detected by means of resonance enhanced multiphoton ionization spectroscopy. Molecules oriented with the N-end towards the surface exhibit a higher vibrational relaxation probability than those oriented with the O-end towards the surface. This strong orientation dependence arises from the orientation dependence of the underlying electron transfer reaction responsible for the vibrational relaxation. At reduced incidence translational energy, we observe a reduced steric effect. This reflects dynamical steering and re-orientation of the NO molecule upon its approach to the surface.