Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 8: Poster: Collisions

MO 8.2: Poster

Dienstag, 12. März 2024, 17:00–19:00, Tent C

Intermolecular Coulombic Decay from organic dimers — •Deepthy Maria Mootheril1, Xueguang Ren2, Thomas Pfeifer1, and Alexander Dorn11Max-Planck-Institute of Nuclear Physics, Heidelberg, 69115, Germany — 2School of Physics, Xi’an Jiaotong University, Xi’an, 710049, China

Inter-atomic/intermolecular Coulombic decay (ICD) is an important electronic relaxation mechanism after inner-valence ionization of atoms or molecules with weakly bound neighbours. Here we study ICD in organic heterocycle dimers like thiophene dimers and pyridine-water complexes induced by electron collisions (109 eV) using the (e,e+2ion) coincidence technique [1]. Collisions with electrons causes ionization of the inner valence orbital. It is observed that the energy released after relaxation to the inner valence vacancy is transferred to the neighbouring molecule, mainly via ICD, ionizes the outer valence orbital of the neighbor and thus inducing Coulomb explosion of the dimer. Comparison of projectile energy loss spectra with theoretical single ionization spectra shows the ICD mainly proceeds from the C 2s−1 inner valence vacancy in thiophene dimers and from the O 2s−1 and the N 2s−1 inner-valence vacancies in pyridine-water clusters [2].
References:
[1] X. Ren et al 2018 Nature Physics 14(10) 1062- 1066
[2] A. D. Skitnevskaya et al 2023 J. Phys. Chem. Lett. 14(6) 1418-1426

Keywords: Electron collisions; biomolecules; ICD

100% | Bildschirmansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Freiburg