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| Home > Publications database > Laser-induced Coulomb explosion imaging of $(C_6$$H_5$$Br)$$_2$ and $C_6$$H_5$$Br$-$I_2$ dimers in helium nanodroplets using the Timepix3 |
| Home > Publications database > Laser-induced Coulomb explosion imaging of $(C_6$$H_5$$Br)$$_2$ and $C_6$$H_5$$Br$-$I_2$ dimers in helium nanodroplets using the Timepix3 |
| Journal Article | PUBDB-2021-02565 |
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2021
IOP Publ.
Bristol
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Please use a persistent id in citations: doi:10.1088/1361-6455/ac04c4
Report No.: arXiv:2105.00764
Abstract: We have deduced the structure of the bromobenzene-$I_2$ heterodimer and the bromobenzene homodimer inside helium droplets using a combination of laser-induced alignment, Coulomb explosion imaging, and three-dimensional ion imaging. The complexes were fixed in a variety of orientations in the laboratory frame, then in each case multiply ionized by an intense laser pulse. A three dimensional ion imaging detector, including a Timepix3 detector allowed us to measure the correlations between velocity vectors of different fragments and, in conjunction with classical simulations, work backward to the initial structure of the complex prior to explosion. For the heterodimer, we find that the $I_2$ molecular axis intersects the phenyl ring of the bromobenzene approximately perpendicularly. The homodimer has a stacked parallel structure, with the two bromine atoms pointing in opposite directions. These results illustrate the ability of Coulomb explosion imaging to determine the structure of large complexes, and point the way toward real-time measurements of bimolecular reactions inside helium droplets.
Keyword(s): Atomic and Molecular Clusters (physics.atm-clus) ; Chemical Physics (physics.chem-ph) ; Optics (physics.optics) ; FOS: Physical sciences
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