Stuttgart 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 1: Vibrational Spectroscopy
MO 1.8: Vortrag
Montag, 12. März 2012, 12:30–12:45, V38.03
Raman Studies of Ionic Liquids with Weakly Coordinating Anions — Susana Chatzipapadopoulos1, •Frank Friedriszik1, Daniela Kerlé2, Oliver Kühn1, Stefan Lochbrunner1, Ralf Ludwig2, Matthias Lütgens1, and Christian Roth2 — 1University of Rostock, Institute of Physics — 2University of Rostock, Institute of Chemistry
The role of hydrogen bonds in ionic liquids (ILs) is subject of intensive current research. Imidazolium-based ILs show clear hints for hydrogen bonds [1]. In addition Lassègues et al. [2] argue that overtones of the aromatic ring chain vibrations interact with C-H groups in the ring in case of weakly coordinating anions and can explain IR and Raman spectra without involving hydrogen bonds. To clarify the interpretation of vibrational spectra in the regions of the C-H stretch modes of the alkyl chain and the imidazolium ring we investigate ILs by linear Raman and IR spectroscopy. Time-resolved measurements characterizing dephasing processes are done by coherent anti-Stokes Raman spectroscopy (CARS). First experimental results will be presented and discussed in the light of molecular dynamics simulations and quantum chemical calculations.
[1] K. Fumino, A. Wulf, R. Ludwig, Angew. Chem. Int. Ed. 2008, 47, 8731 - 8734
[2] J.-C. Lassègues, J. Gronding, D. Cavagnat, P. Johansson, J. Phys. Chem. A 2009, 113, 6419 - 6421