Isomer-dependent fragmentation dynamics of inner-shell photoionized difluoroiodobenzene

Physical Chemistry Chemical Physics : PCCP
Utuq AblikimD Rolles

Abstract

The fragmentation dynamics of 2,6- and 3,5-difluoroiodobenzene after iodine 4d inner-shell photoionization with soft X-rays are studied using coincident electron and ion momentum imaging. By analyzing the momentum correlation between iodine and fluorine cations in three-fold ion coincidence events, we can distinguish the two isomers experimentally. Classical Coulomb explosion simulations are in overall agreement with the experimentally determined fragment ion kinetic energies and momentum correlations and point toward different fragmentation mechanisms and time scales. While most three-body fragmentation channels show clear evidence for sequential fragmentation on a time scale larger than the rotational period of the fragments, the breakup into iodine and fluorine cations and a third charged co-fragment appears to occur within several hundred femtoseconds.

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Citations

Jul 22, 2018·Physical Chemistry Chemical Physics : PCCP·Thomas KierspelJochen Küpper
Nov 19, 2020·The Journal of Physical Chemistry Letters·Shashank PathakDaniel Rolles

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