Schouder, Constant;
Chatterley, Adam S;
Johny, Melby;
Hübschmann, Flora;
Al-Refaie, Ahmed F;
Calvo, Florent;
Küpper, Jochen;
(2021)
Laser-induced Coulomb explosion imaging of (C6H5Br)2 and C6H5Br–I2 dimers in helium nanodroplets using a Tpx3Cam.
Journal of Physics B: Atomic, Molecular and Optical Physics
, 54
(18)
, Article 184001. 10.1088/1361-6455/ac04c4.
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Abstract
We have deduced the structure of the bromobenzene–I2 heterodimer and the (bromobenzene)2 homodimer inside helium droplets using a combination of laser-induced alignment, Coulomb explosion imaging (CEI), 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 Tpx3Cam 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 I2 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 CEI to determine the structure of large complexes, and point the way toward real-time measurements of bimolecular reactions inside helium droplets.
| Type: | Article |
|---|---|
| Title: | Laser-induced Coulomb explosion imaging of (C6H5Br)2 and C6H5Br–I2 dimers in helium nanodroplets using a Tpx3Cam |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6455/ac04c4 |
| Publisher version: | http://dx.doi.org/10.1088/1361-6455/ac04c4 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191902 |
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