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MO: Fachverband Molekülphysik

MO 9: Chirality II

MO 9.6: Vortrag

Dienstag, 3. März 2026, 12:30–12:45, P 110

Photoelectron Circular Dichroism of Aqueous-Phase Alanine — •Dominik Stemer and Bernd Winter — Fritz Haber Institute of the Max Plank Society, Berlin, Germany

Photoelectron circular dichroism (PECD) manifests as a forward-backward asymmetry in photoelectron flux upon photoionization of chiral molecules by circularly polarized light, and is an exquisitely sensitive probe of molecular chirality, capable of determining enantiomeric excess, but also of resolving differences in molecular conformation and charge state. Although the use of PECD to study chiral biomolecules under physiologically relevant conditions promises to shed light on otherwise difficult-to-access interactions, for example the nature of chirality transfer between a chiral solute and its first solvent shell, the application of PECD to liquid samples is practically challenging. We have previously demonstrated the possibility of measuring PECD for liquid microjets of the neat chiral liquid fenchone, and have more recently confirmed the applicability of PECD to aqueous solutions more generally. Here, we will report on our successful LJ-PECD experiments for core-level photoionization of aqueous-phase alanine, as well as on new results based on the chiral surfactant methylbenzylamine.

Keywords: Photoelectron circular dichroism; Liquid-jet photoelectron spectroscopy