Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 23: Poster: Chirality
MO 23.3: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent C
Photoelectron circular dichroism after O1s ionization in sec-butyl trimethylsilylether — •Christina Zindel, Emilia Heikura, Catmarna Küstner-Wetekam, Lutz Marder, Johannes Viehmann, Denis Kargin, Rudolf Pietschnig, Andreas Hans, and Arno Ehresmann — Institut für Physik and CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
Following ionization with circularly polarized radiation, randomly oriented enantiomers show a forward-backwards asymmetry in their photoelectron angular distribution (PAD) with respect to the light’s propagation direction. This effect is described as photoelectron circular dichroism (PECD) — a powerful tool to examine the molecular chirality of gas-phase samples. In our studies, we use a velocity map imaging spectrometer (VMI) along with synchrotron radiation to investigate the chiral molecule sec-butyl trimethylsilylether (C4H9-O-Si3(CH3)). When varying the distance between the stereocenter and the silicon atom by subsequently inserting CH2 groups in between, it is of interest whether the PECD magnitude changes after ionization of the O1s orbital, because although the length of the molecule varies in this case, for oxygen, its geometry with respect to the stereocenter remains the same.
Keywords: VMI; PECD; Chirality; Photoelectron spectroscopy