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Dissociative Ionization and Coulomb Explosion of Molecular Bromocyclopropane in an Intense Femtosecond Laser Field

The dissociative ionization and Coulomb explosion of molecular bromocyclopropane (BCP) has been experimentally investigated by time-of-flight mass spectrum and dc-slice imaging technology. The sliced 2D images, kinetic energy releases and angular distributions of the fragment ions are obtained under...

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Detalles Bibliográficos
Autores principales: Liu, Botong, Yang, Yan, Sun, Haitao, Sun, Zhenrong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6321640/
https://www.ncbi.nlm.nih.gov/pubmed/30486415
http://dx.doi.org/10.3390/molecules23123096
Descripción
Sumario:The dissociative ionization and Coulomb explosion of molecular bromocyclopropane (BCP) has been experimentally investigated by time-of-flight mass spectrum and dc-slice imaging technology. The sliced 2D images, kinetic energy releases and angular distributions of the fragment ions are obtained under the intense femtosecond laser fields (8.0 × 10(13)–2.0 × 10(14) W/cm(2)). The results indicated that the low kinetic energy release (KER) components come from dissociative ionization of BCP(+), while the high KER components come from Coulomb explosion of BCP(2+). The chemical reaction path of BCP(+) has been calculated by ab initio calculation, furthermore, the C-Br bond cleavage involved Coulomb explosion channels have been revealed, and the corresponding dehydrogenation mechanism has been confirmed.