SAMOP 2023 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 21: Molecular Physics with X-rays
MO 21.6: Vortrag
Freitag, 10. März 2023, 12:15–12:30, F102
Creating Electronic Molecular Movies Using Time-Resolved X-Ray Photoelectron Spectroscopy at Free-Electron Lasers — Dennis Mayer1, •Fabiano Lever1, David Picconi2, Skirmantas Alisauskas1, Agata Azzolin5, Francesca Calegari3,4,5, Giovanni Cirmi1,4, Stefan Düsterer1, Ulrike Frühling1, Alice Green6,7, Ingmar Hartl1, Marion Kuhlmann1, Tommaso Mazza6, Steffen Palutke1, Sebastian Schulz1, Andrea Trabbatoni3,8, Atia Tul Noor1, and Markus Gühr1 — 1DESY, Hamburg, Germany — 2University of Groningen, The Netherlands — 3CFEL, DESY, Hamburg, Germany — 4The Hamburg Centre for Ultrafast Imaging, Germany — 5University of Hamburg, Germany — 6European XFEL, Schenefeld, Germany — 7Stanford PULSE Institute, Menlo Park, USA — 8University of Hannover, Germany
Recently, we were able to extend the chemical shift concept to excited state molecular dynamics [1]. Here, we present a follow-up experiment performed at FLASH, showing C 1s time-resolved photoelectron spectra of 2-thiouracil after UV excitation. The photoelectron spectra show a strong shift towards lower binding energies suggesting a charge movement towards the pyrimidine ring. These measurements verify the concept of the excited-state chemical shift [1] and pave the way to create electronic molecular movies for the UV-induced relaxation using time-resolved x-ray photoelectron spectroscopy.
[1] Mayer et al., Nature Communications 13, 198 (2022)