Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 18: Poster: Cluster
MO 18.12: Poster
Mittwoch, 13. März 2024, 17:00–19:00, Tent C
UV photo-induced dissociation dynamics of solvated (bio)molecular complex system — •Mukhtar Singh1,2,3, Matthew Scott Robinson1,2,3, Hubertus Bromberger1,2, Jolijn Onvlee1,3, Sebastian Trippel1,2, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Center for Ultrafast Imaging, Universität Hamburg — 3Department of Physics, Universität Hamburg
We present the investigation of ultrafast chemical dynamics induced by UV excitation in a micro-solvated indole-water-complex system probed by time-dependent strong-field ionization, and ion mass spectroscopy [1]. Indole-water is important due to indole’s role as the chromophore of tryptophan, the strongest near UV absorber in proteins. The experimental setup contains a molecular beam and the electrostatic deflector to produce a pure gas-phase sample of indole-water [2]. We conducted a UV-IR pump-probe experiment, wherein we excited the system to the electronic excited state using 270 nm light. The dissociation dynamics of the system was monitored using strong-field multiphoton ionization by 1.3 µm wavelength light from a femtosecond laser, tracking the time-dependent ion signals of the indole and indole-water ions.
[1] J Onvlee, et al., Nat Commun. 13, 7462 (2022)
[2] S. Trippel, et al., Rev. Sci. Instrum. 89, 096110 (2018)