Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 78: Poster: Surface Dynamics - Reactions, Elementary Processes and Phase Transitions

O 78.7: Poster

Wednesday, March 14, 2018, 18:15–20:30, Poster A

New molecular beam set-up to study dynamics at ionic liquids surfaces — •Radha Gobinda Bhuin, Hans-Peter Steinrück, and Florian Maier — Lehrstuhl für Physikalische Chemie II, FAU, Erlangen, Germany

More than a decade surfaces and interfaces of ionic liquids (ILs) have been studied extensively. These studies mostly concern 'static' properties of ILs such as interface composition, molecular orientation and surface termination, enrichment and layering effects, surface tension, and adsorption of small molecules.1,2,3 However, the dynamics of the transfer of the gases through the interface and its dependence on the interface properties have not been studied so far, despite their importance in catalysis and separation technologies.4 Therefore, to investigate the dynamical interaction processes at the ionic liquid surfaces we have designed and built a new molecular beam setup which combines a supersonic molecular beam with a rotatable mass spectrometer and an X-ray photoelectron spectrometer for in situ XPS-investigations. Using this set-up we will address in particular the question how gases pass through the gas/liquid interface depending on the gas / IL physico-chemical properties. RGB and HPS thank the ERC for financial support through an Advanced Investigator Grant to HPS. References [1] H.-P. Steinrück, Phys. Chem. Chem. Phys. 14, 5010 (2012). [2] H.-P. Steinrück, Surf. Sci. 604, 481 (2010). [3] K. R. J. Lovelock et al., Chem. Rev. 110, 5158 (2010). [4] N. V. Plechkovaa and K. R. Seddon, Chem. Soc. Rev. 37, 123 (2008).