Berlin 2014 – wissenschaftliches Programm

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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.

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