Berlin 2014 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

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

MO 13.5: Poster

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

Spatial separation of molecular clusters and conformers — •Thomas Kierspel1,2, Daniel A. Horke1, Yuan-Pin Chang1, Sebastian Trippel1, and Jochen Küpper1,2,31Center for Free-Electron Laser Science, DESY, Hamburg — 2The Hamburg Center for Ultrafast Imaging — 3Department of Physics, University of Hamburg

Many complex molecules exhibit multiple structural isomers (conformers) [1], even at the low temperatures in a cold molecular beam [2]. These conformers, as well as molecular clusters, typically differ in their electric dipole moment. The dispersion of a molecular beam using the electric deflector can be exploited for the spatial separation of the different species present in the beam [3]. We present the spatial separation of both, cis- and trans-, conformers of 3-fluorophenol (3FP) [4], the separation of indole-water dimers from a cluster soup [5], and discuss the prospects for conformer separation of glycine, the smallest amino acid. 3FP is a prototypically large molecule and conformational clean samples enable novel experiments like laser pump-, and ultrafast X-ray or photoelectron diffraction probe, to image conformer-interconversion processes. Molecular clusters like indole-water are bridging the gap between isolated and solvated molecules and are a key to understand the molecule-solvent interaction and the influence of the environment on the molecular function.

[1] Suenram et al., J. Mol. Spectrosc. 72 , 372-382 (1978) [2] Rizzo et al., J. Chem. Phys 83, 4819 (1985) [3] Chang et al., Science 342, 98-101 (2013) [4] Kierspel et al., Chem. Phys. Lett. 591, 130-132 (2014) [5] Trippel et al., Phys. Rev. A 86, 033202 (2012)

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