Time-resolved dynamics of thiophene dication - probing parent molecule survival times and multi-step dissociation processes of cyclic molecules by free-electron-laser experiments combined with theoretical simulations



: Kukk E, Fukuzawa H, Nagaya K, Niskanen J, Luo Y, Peschel J, Kooser K, Itl E, Pelimanni E, Saito S, You D, Maclot S, Nizou A, Ha DT, Myllynen H, Ueda K

: Ancarani L. U. et al.

: International Conference on Photonic, Electronic and Atomic Collisions

: 2020

: Journal of Physics: Conference Series

: 31st International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC XXXI) 23-30 July 2019, Deauville, France

: 31ST INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC XXXI)

: J PHYS CONF SER

: ARTN 112007

: 1412

: 112007

: 1

: 1742-6588

DOI: https://doi.org/10.1088/1742-6596/1412/11/112007

: https://research.utu.fi/converis/portal/detail/Publication/49808155


Thiophene is a cyclic molecule that becomes unstable as a molecular dication. We followed the multi-step dissociation dynamics triggered by soft x-ray FEL pulses from SACLA, core-ionizing the S 2p orbital and creating parent dications by the Auger decay. The time-evolution was probed by optical laser pulsesthat reveal the survival lifetime of the parent dication and the build-up of fragmentation proceeding by ring opening and rupture, accompanied by hydrogen ejection and secondary dissociation. Experimental results are compared to statistical analysis of molecular dynamics simulations.

Last updated on 2024-26-11 at 19:48