Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 25: Clusters in Molecular Physics (with MO & MS)

A 25.1: Hauptvortrag

Mittwoch, 25. März 2015, 14:30–15:00, PH/SR106

Vibrational Spectroscopy of Cluster Complexes with Free Electron Lasers: Surface Science en Miniature — •André Fielicke — Institut für Optik und Atomare Physik, Technische Universität Berlin, Germany

Transition metal clusters are frequently used as model systems for low coordinated sites of extended surfaces and their study can provide valuable insights into the mechanisms of surface reactions. In many cases, however, there is still a lack of information on their structures and the relationship between structure and chemical behavior. Using vibrational spectroscopy of gas-phase clusters one can obtain information about the clusters' structure or the behavior of adsorbed species. The latter provides valuable insights into the binding geometry, the activation of bonds within the ligands or reactions occurring on the clusters' surface. Cluster size specific data can be obtained using infrared multiple photon dissociation spectroscopy. To cover the required spectral range from the far to the mid-IR our experiments make use of IR free electron lasers. The talk will discuss exemplary studies about reactions on platinum clusters [1] and the activation of molecular oxygen by small gold clusters [2].

[1] D.J. Harding, A. Fielicke, Chem. Eur. J. 20 (2014) 3258

[2] A.P. Woodham, A. Fielicke, Struct. Bond. 161 (2014) 243

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