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Surface-Aligned Femtochemistry: Molecular Reaction Dynamics on Oxide Surfaces

Springer Series in Chemical Physics, ISSN: 0172-6218, Vol: 107, Page: 231-261
2014
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Book Chapter Description

In this contribution the application of ultrafast laser pulses to reveal the dynamics of chemical reactions on metal oxide surfaces will be discussed. A combination of an optical pump-probe configuration with time-of-flight mass spectrometry is employed to monitor the mass and the relative velocity of intermediates and products of a photoinduced surface reaction in real time. Starting from a well defined reactant adsorption geometry representing the initial "collision complex" of the reactive encounter, this approach enables the observation of the coherent nuclear motion through the transition state to the emerging reaction products and thus provides insight into the elementary steps of complex surface chemical reaction mechanisms. Results will be presented for the application of this technique to the photodissociation dynamics of methyl iodide and methyl bromide adsorbed on magnesia ultrathin films on a Mo(100) single crystal surface. © Springer International Publishing Switzerland 2014.

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