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MO: Fachverband Molekülphysik
MO 19: MO Poster 4
MO 19.8: Poster
Donnerstag, 12. März 2020, 17:00–19:00, Empore Lichthof
Experimental evidence for core-level intermolecular Coulombic decay in hydrated pyrimidine — •Dana Bloß1, Catmarna Küstner-Wetekam1, Philipp Schmidt1, Sascha Deinert2, Florian Trinter2, Gregor Hartmann1, Arno Ehresmann1, Lorenz S. Cederbaum3, Nikolai V. Kryzhevoi3, André Knie1, and Andreas Hans1 — 1Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Deutsches Elektronen-Sychrotron (DESY), Notkestrasse 85, 22607 Hamburg — 3Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
We investigated the effect of the presence or absence of an aqueous environment for bio-relevant molecules after their exposure to X-ray irradiation in a photoelectron-ion-ion coincidence experiment performed at the P04 at Petra III. In the decay of carbon inner-shell vacancies of hydrated pyrimidine we found evidence for direct intermolecular Coulombic decay. This process protects the molecule from reaching dicationic states via Auger decay and the inevitable fragmentation. The observations are compared with the results of theoretical calculations for a deeper understanding of the occurring effects.