Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 3: Novel Spectroscopies
MO 3.8: Vortrag
Montag, 11. März 2024, 18:45–19:00, HS 1015
Photoelectron Photoion Multicoincidence Study of Micro-Solvated Thymine Molecules — •Brendan Wouterlood1, Stephan Schmitz1, Madhusree Roy-Chowdhury2, Gustavo Garcia-Macias2, Laurent Nahon2, Frank Stienkemeier1, and Sebastian Hartweg1 — 1Institute of Physics, University of Freiburg — 2Synchrotron SOLEIL, St. Aubin, France
Studying biomolecules, such as amino acids and nucleobases, in the gas phase allows unparalleled detail and fundamental insights into energetics and dynamics at the molecular level. However, in-vivo bio-molecular systems exist mostly in the condensed phase, which can affect ionisation energies as well as fragmentation and relaxation pathways. Micro-solvation can be exploited to bridge the gap between the gas and the condensed phases and allows for the application of double imaging photoelectron photoion photoion coincidence (i2PEPIPICO) spectroscopy. The ion-ion coincidence detection enables identification of signals arising from non-local auto-ionisation processes of clusters, such as from intermolecular Coulombic decay. These processes are important to the field of radiation chemistry since the production of low energy electrons can trigger reactions which damage biological material. Here, preliminary results of a i2PEPIPICO study of small water clusters (H2O)n (n=1-10) and water-thymine complexes, will be presented.
Keywords: Photoelectron Photoion Coincidence Spectroscopy; Microsolvation; Water Clusters; Nucleobases