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MO: Fachverband Molekülphysik

MO 5: MO Poster 1

MO 5.5: Poster

Montag, 9. März 2020, 17:00–19:00, Empore Lichthof

PhotoElectron Circular Dichroism (PECD) of Anionic Metal Complexes — •Jenny Triptow, Gerard Meijer, and André Fielicke — Fritz-Haber-Institut der Max Planck Gesellschaft, Berlin, Deutschland

Experiments on PECD are typically done with neutral chiral molecules and reveal asymmetries in the Photoelectron distribution of up to 10%. To perform these experiments, fs-lasers or synchrotron beamlines have to be used.

In our experiment, the PECD method is performed on anionic chiral molecules where a tabletop ns-laser is sufficient to photo-detach the relatively weakly-bound electron. Since a neutral chiral molecule and an electron are left behind, the missing long range interaction of the Coulomb potential can reveal the influence of short range interactions between the electron and the dipole moments of the molecule on the PECD effect.

Our initial approach to create chiral anions was to bind a neutral chiral molecule to an atomic gold anion. Atomic gold anions are easily produced in a laser ablation source. Our current procedure is deprotonation in a Plasma Entrainment Source followed by a supersonic expansion. Both the production of the chiral molecules bound to gold anions and the deprotonated molecules are verified by a Wiley-McLaren time-of-flight mass spectrometer and a velocity map imaging spectrometer.