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MO: Fachverband Molekülphysik

MO 13: Posters 3: Cold Molecules, Helium Nano Droplets, and Experimental Techniques

MO 13.24: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

NC₄₁₁₁ NTf₂ in Helium Nanodroplets — •Matin Kaufmann, Kenny Hanke, Teemu Salmi, Gerhard Schwaab, and Martina Havenith — Physikalische Chemie II, Ruhr-Universität Bochum, Germany

Room temperature ionic liquids (ILs) are organic salts with a melting point around room temperature. Combinations of different cations and anions lead to a plethora of ILs and therefore provide room for many applications as in cleaning processes, gas storage and batteries. Due to their ionic nature, ILs possess a low vapor pressure, and there exist only few studies on gas phase spectroscopy.

Superfluid helium nanodroplets provide a soft matrix for the infrared spectroscopy of single molecules and small clusters. Vapor pressures of only 10⁻⁶ mbar are sufficient to incorporate molecules into the droplets. Through evaporative cooling the embedded molecules are then cooled to a temperature of 0.37 K where molecular motion is minimal, yielding clean spectra.

We hereby present IR spectra of buthyltrimethylammonium bis(trifluoromethylsulfonyl)imide (NC₄₁₁₁ NTf₂). By analyzing the vibrational bands for complexes with different numbers of ions, we obtain information on the interaction of the ions.