Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Electron Dynamics in Chiral Systems SYCS 2 (with MO)
A 11.1: Hauptvortrag
Montag, 17. März 2014, 14:00–14:30, BEBEL HS213
Imaging the Absolute Configuration of a Chiral Epoxide in the Gas Phase — •Holger Kreckel1, 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, and Oliver Trapp2 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg — 3Weizmann Institute of Science, 76100 Rehovot, Israel — 4Columbia Astrophysics Laboratory, New York, NY, USA — 5Institut für Organische Chemie, Eberhard Karls Universität Tübingen
Chiral molecules exist in two different configurations which are non-superimposable mirror images of one another. The respective configurations are referred to as enantiomers. Most methods to distinguish between enantiomers rely on interactions with polarized light. However, to infer the underlying handedness of the molecular structure (the absolute configuration) from spectroscopic measurements is non-trivial. Here we present foil-induced Coulomb Explosion Imaging measurements of isotopically labeled dideuterooxirane (C2H2D2O). Our experiments allow for the determination of the handedness of enantio-selected samples by direct imaging of individual molecular configurations [1]. Our method requires no quantum-chemical calculations, and it can be applied to small species like epoxides, where the chiral information is carried by light atoms exclusively.
[1] P. Herwig et al., Science 342, 1084 (2013)