Freiburg 2024 – scientific programme
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MO: Fachverband Molekülphysik
MO 18: Poster: Cluster
MO 18.11: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent C
Supramolecular dynamics investigated on hydrogen-bonded pyrrole-water clusters upon site-specific x-ray photoionization — •Wuwei Jin1,2, Ivo Vinklárek1, Hubertus Bromberger1, Sebastian Trippel1,3, Rebecca Boll4, Michael Meyer4, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Department of Physics, Universität Hamburg — 3Center for Ultrafast Imaging, Universität Hamburg — 4European XFEL GmbH, Schenefeld
The solvation of molecules crucially affects their photostability and introduces additional pathways for relaxation dynamics compared to isolated molecules. To gain molecular-level insights into the solvation effects on the photofragmentation dynamics of a supramolecular system, we investigate the dynamics of a spatially separated pure sample of pyrrole-water (pyr-H2O) clusters prepared by the electric deflector [1-2]. This is achieved through an IR-pump-x-ray-probe experiment at EuXFEL. An ionizing IR pulse triggers the (pyr-H2O)+ fragmentation. The resulting dynamics are site-specifically probed by x-ray free-electron laser pulses [3]. This study of the hydrogen-bonded pyrrole-H2O system is particularly relevant to pyrrole-containing biomolecules and establishes a new approach to study the key role of intermolecular interactions in supermolecular dynamics.
[1] M Johny, S Trippel, and J Küpper, Chem. Phys. Lett. 721, 149 (2019) [2] YP Chang, D Horke, S Trippel, and J Küpper, Int. Rev. Phys. Chem. 557, 34 (2015) [3] J Onvlee, S Trippel, and J Küpper, Nat. Commun. 7462, 13 (2022)