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O: Fachverband Oberflächenphysik

O 60: Poster Session III (Methods: Atomic and electronic structure; Methods: electronic structure theory; Methods: Molecular simulations and statistical mechanics; Methods: Sanning probe techniques; Methods: other (experimental); Methods: other (theory) )

O 60.32: Poster

Mittwoch, 24. März 2010, 17:45–20:30, Poster B2

Molecular trapping and scattering at ionic liquid surfaces — •Andre Dorsch, Matthias Schöppke, and Reinhard Denecke — Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103 Leipzig, Germany

Gas uptake in ionic liquids is an important process for the technological use of such substances [1,2]. Using a supersonic molecular beam setup and a moveable quadrupole mass spectrometer, the interaction of CO₂ and N₂ with surfaces of imidazolium-based ionic liquids have been studied. Employing angle-resolved measurements, trapping and inelastic scattering events can be determined. Parameters like the kinetic energy of the impinging molecules, which influence the behaviour, are systematically varied. From the results residence times of gases in ionic liquids are derived.

[1] J. F. Brennecke, E. J. Maginn, Purification of Gas with Liquid Ionic Compounds. US Patent 6,579,343 (2003).

[2] A. Yokozeki, M. B. Shiflett, Appl. Energy 84, 351 (2007).