Hydrogen migration in inner-shell ionized halogenated cyclic hydrocarbons.

Autor: Abid AR; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA. abdul.abid@phys.au.pk.; Nano and Molecular Systems Research Unit, University of Oulu, 90570, Oulu, Finland. abdul.abid@phys.au.pk.; Department of Physics and Astronomy, Aarhus University, 8000, Aarhus, Denmark. abdul.abid@phys.au.pk., Bhattacharyya S; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Venkatachalam AS; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Pathak S; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Chen K; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Lam HVS; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Borne K; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA., Mishra D; Department of Physics, University of Connecticut, Storrs, CT, 06269, USA., Bilodeau RC; Department of Physics, University of Connecticut, Storrs, CT, 06269, USA., Dumitriu I; Hobart and William Smith Colleges, Geneva, NY, 14456, USA., Berrah N; Department of Physics, University of Connecticut, Storrs, CT, 06269, USA., Patanen M; Nano and Molecular Systems Research Unit, University of Oulu, 90570, Oulu, Finland., Rolles D; J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA. rolles@phys.ksu.edu.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Feb 06; Vol. 13 (1), pp. 2107. Date of Electronic Publication: 2023 Feb 06.
DOI: 10.1038/s41598-023-28694-x
Abstrakt: We have studied the fragmentation of the brominated cyclic hydrocarbons bromocyclo-propane, bromocyclo-butane, and bromocyclo-pentane upon Br(3d) and C(1s) inner-shell ionization using coincidence ion momentum imaging. We observe a substantial yield of CH 3 + fragments, whose formation requires intramolecular hydrogen (or proton) migration, that increases with molecular size, which contrasts with prior observations of hydrogen migration in linear hydrocarbon molecules. Furthermore, by inspecting the fragment ion momentum correlations of three-body fragmentation channels, we conclude that CH x + fragments (with x = 0, …, 3) with an increasing number of hydrogens are more likely to be produced via sequential fragmentation pathways. Overall trends in the molecular-size-dependence of the experimentally observed kinetic energy releases and fragment kinetic energies are explained with the help of classical Coulomb explosion simulations.
(© 2023. The Author(s).)
Databáze: MEDLINE
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