15min:

PABLO NIETO, MELANIE LETZNER, DANIEL HABIG, TOERSTEN POERSCHKE, SARAH ANGELIQUE GRÜN, KENNY HANKE, GERHARD SCHWAAB AND MARTINA HAVENITH, Department of Physical Chemistry II, Ruhr-Universität Bochum, Germany.

The study of acid-water clusters is an active area of research due to its fundamental importance for chemistry^,. In particular the (HCl)_n(H₂O)_m clusters have been extensively investigated both theoretically and experimentally as a benchmark system. Despite of the great effort devoted to its understanding HCl dissociation in water clusters is still not well understood. An IR-Spectroscopy study on (HCl)_n(H₂O)_m embedded in helium nanodroplets will be presented. The H₂¹⁶O H₂¹⁸O and isotopic substitution was used in the experiments to probe the bands in the 2650-2760 cm^-1 spectral range which has been object of some debate recently^,. The observed isotopic shifts for the different bands raise some new questions to be addressed.