Freiburg 2024 – scientific programme

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MO: Fachverband Molekülphysik

MO 19: Chirality

MO 19.4: Talk

Thursday, March 14, 2024, 12:00–12:15, HS 3044

Silicon 2p inner-shell photoelectron circular dichroism in sec-butyl trimethylsilylether — •Emilia Heikura, Christina Zindel, Lutz Marder, Catmarna Küstner-Wetekam, Niklas Golchert, Johannes Viehmann, Denis Kargin, Rudolf Pietschnig, Andreas Hans, and Arno Ehresmann — University of Kassel, Heinrich-Plett-Straßse 40, 34132 Kassel

Photoelectron circular dichroism (PECD) is one of the most powerful methods for investigating molecular chirality in the gas phase. PECD is a forward-backward asymmetry of emitted photoelectrons from chiral molecules after interaction with a circularly polarized light. The asymmetry can be observed even in randomly oriented chiral molecules. Site-selectivity of inner-shell photoelectrons enables the investigation on chirality as a function of a distance from a stereocenter. It is still unknown how the magnitude of PECD is affected by the distance of the emission site from the stereocenter. To be able to investigate this phenomenon, a series of specifically synthesized molecules was created. In sec-butyl trimethylsilylether and it’s derivatives the distance between stereocenter and a marker atom can be increased by inserting additional CH2 groups while otherwise the structure of the molecule stays intact.

Keywords: chirality; photoelectron circular dichroism; velocity map imaging; photoelectron spectroscopy; circularly polarized light