Open AccessTime-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
Author(s) -
E. Kukk,
H. Fukuzawa,
K. Nagaya,
Johannes Niskanen,
Yu Luo,
Jasper Peschel,
Kuno Kooser,
E. Itl,
Eetu Pelimanni,
S. Saito,
Daehyun You,
Sylvain Maclot,
A. Nizou,
Dang Trinh Ha,
Hanna Myllynen,
Ken Ueda
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1412/11/112007
Subject(s) - dication , dissociation (chemistry) , fragmentation (computing) , molecule , chemistry , laser , electron , photochemistry , atomic physics , chemical physics , molecular physics , physics , optics , nuclear physics , organic chemistry , computer science , operating system
Synopsis 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.