Isomer-dependent fragmentation dynamics of inner-shell photoionized difluoroiodobenzene

Literature Information

Publication Date 2017-05-11
DOI 10.1039/C7CP01379E
Impact Factor 3.676
Authors

Cédric Bomme, Evgeny Savelyev, Hui Xiong, Rajesh Kushawaha, Rebecca Boll, Kasra Amini, Timur Osipov, David Kilcoyne, Artem Rudenko, Nora Berrah, Daniel Rolles


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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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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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