Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 19: Cluster III (joint session MO/A)
MO 19.5: Vortrag
Donnerstag, 14. März 2019, 11:45–12:00, S HS 001 Biologie
Photophysics investigation of pyrrole and pyrrole-water1 clusters — •Melby Johny1, Sebastian Trippel1,2, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, DESY, Hamburg — 2The Hamburg Center for Ultrafast Imaging, Universität Hamburg, Hamburg — 3Department of Physics, Universität Hamburg, Hamburg
The properties of atoms and molecules are strongly dependent on their local environment and hydrogen bonds are of universal importance in chemistry and biochemistry. Therefore, it is highly desirable to bridge the gap between single, isolated molecules and molecules in solvation.
Here, we show the investigation of the photophysics of pyrrole and the single hydrogen bonded pyrrole-water1 clusters via site-specific x-ray ionisation and strong field ionisation by intense near-infrared laser pulses. The photo-fragmentation owing to core-shell ionisation at nitrogen(N 1s) were analyzed by means of photoelectron photoion-photoion coincidence(PEPIPICO) imaging. A 3D-imaging detector, Timepix3 was used for coincidence detection of strong field ionisation of pyrrole and pyrrole-water1. For pyrrole-water1 clusters, we observed proton or hydrogen atom transfer from pyrrole moiety to the hydrogen bonded water molecule and the fragmentation dynamics is significantly different from bare pyrrole.