Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 17: Posters 2: Cold Molecules and Clusters

MO 17.19: Poster

Mittwoch, 7. März 2018, 16:15–18:15, Orangerie

THz/IR spectroscopy of glycine-water in helium nanodroplets — •Nitish Pal¹, Devendra Mani¹, Raffael Schwan¹, Gerhard Schwaab¹, Britta Redlich², Lex van der Meer², and Martina Havenith¹ — ¹Physikalische Chemie II, Ruhr-Universität Bochum, Germany — ²Institute for Molecules and Materials (IMM), Radboud University Nijmegen, Nijmegen, Netherlands

It is well known that glycine exists in the neutral form in gaseous state and in the zwitterionic form in aqueous solution. Numerous experimental [1] and theoretical [2] studies have been carried out to understand this transformation. One of the most important goals has been to determine the minimum number of water molecules needed for such transformation.

We have already reported infrared spectra of glycine and 1:1 glycine-water complexes [3], now we are exploring the intermolecular proton transfer mechanism by stepwise adding water molecules to glycine molecule in helium droplets. The superfluid medium of helium nanodroplets allows a barrier-free diffusion of the dopant molecules and enables the formation of molecular clusters at 0.37 K temperature. The experiments are carried out using helium nanodroplet spectroscopy technique in combination with Free Electron Laser (FEL) at FELIX laboratory in Nijmegen. Herein we present the results of glycine-water infrared absorption spectra.

[1] Espinoza, C et al., J. Phys. Chem. A., 114, 5919, (2010).

[2] Tudela, R et al., J. Phys. Chem. Lett., 7, 5137, (2016).

[3] Kaufmann, M et al., Phys. Chem. Chem. Phys., 18, 28082, (2016).