Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Posters 2: Biomolecules, Energy Transfer, Clusters, Quantum Chemistry, Molecular Dynamics and Chirality
MO 10.7: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Absolute configuration determination of a chiral epoxide using Coulomb Explosion Imaging — •Philipp Herwig1, Kerstin Zawatzky2, Manfred Grieser1, Oded Heber3, Brandon Jordon-Thaden1, Claude Krantz1, Oldřich Novotný1,4, Roland Repnow1, Volker Schurig5, Dirk Schwalm1,3, Zeev Vager3, Andreas Wolf1, Oliver Trapp2, and Holger Kreckel1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Organisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg — 3Department of Particle Physics and Astrophysics, Weizmann Institute, Israel — 4Columbia Astrophysics Laboratory, Columbia University, USA — 5Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Tübingen
Molecules that exist in two configurations, which are non-superimposable mirror images of one another, are called chiral. It is well known that the handedness of a chiral molecule influences its reactivity with other chiral species. Nevertheless, the assignment of absolute handedness still proves a challenging task. Here, we present the first successful experimental determination of the absolute configuration of selected enantiomers in the gas phase, using foil-induced Coulomb Explosion Imaging [1]. Fast oxirane molecules were passed through a thin stripping foil, where the binding electrons are removed in sub-femtoseconds, causing the charged nuclei to repel each other strongly. The relative fragment velocities for individual molecular breakups were recorded and reveal the handedness of the molecules. [1] Herwig et al., Science, Vol. 342, 1084-1086, 2013