Bonn 2025 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 10: Poster – Chirality

MO 10.1: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Investigation of chiral structural dynamics using time-resolved PECD — •Nicolas Ladda, Fabian Westmeier, Tonio Rosen, Sudheendran Vasudevan, Simon Ranecky, Sagnik Das, Till Jakob Stehling, Krischna Kant Singh, Hendrike Braun, Jochen Mikosch, Thomas Baumer, and Arne Senftleben — Institute of Physics and CINSaT, University of Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel, Germany

The dynamic change of the chiral character during laser-induced vibrational motion in an electronically excited state of methyl p-tolyl sulfoxide (MTSO) is investigated [1]. For this purpose, we measure the forward/backward asymmetry of the photoelectron angular distribution (PAD) with respect to the propagation direction of ionising circularly polarised light of the randomly oriented chiral molecule, known as photoelectron circular dichroism (PECD) [2]. The vibrational motion in the electronically excited state changes the chiral character of the molecule, which can be investigated by studying the time-resolved PECD with UV femtosecond laser pulses. For this purpose, a two-colour pump-probe setup consisting of 262 nm and 197 nm is used. The current state of the experiment will be reported.

[1] W. Sun, I. Kleiner, A. Senftleben, M. Schnell, J. Chem. Phys. 2022, 156, 15, 154304.

[2] N. Böwering, T. Lischke, B. Schmidtke, N. Müller, T. Khalil, U. Heinzmann, Phys. Rev. Lett. 2001, 86, 1187

Keywords: Chirality; time-resolved PECD