Journal article
The femtochemistry of nitrobenzene following excitation at 240 nm
- Abstract:
- Although the photochemistry of nitrobenzene has been extensively studied, the assignment of fragmentation channels and their specific dynamics remains challenging. Here the photochemistry of nitrobenzene following 240 nm excitation into its S4 excited singlet state is investigated by femtosecond laser-induced ionization using an intense 800 nm pulse, coupled with time-resolved Coulomb explosion imaging and covariance mapping. We assign photochemical channels by observing correlations between the molecular fragment ions of the associated product pairs, enabling the time-resolved dynamics of channels leading to NO, NO2, and C6H5NO to be fully characterized. NO is produced via two distinct pathways, leading to translationally cold and hot photofragments with risetimes of ~ 8 ps and ~ 14 ps, respectively. NO2 photofragments are characterised by a bimodal risetime of ~ 8 ps and ≳ 2 ns, and can be detected within the first picosecond following ultra-violet photon absorption. C6H5NO is formed with a risetime of 17 ps. Kinetic energy disposals determined for the three chemical channels agree well with previous work. The techniques employed offer new opportunities to study the time-resolved photochemistry of relatively complex molecules in the gas phase.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.9MB, Terms of use)
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(Preview, Supplementary materials, pdf, 5.1MB, Terms of use)
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- Publisher copy:
- 10.1038/s42004-025-01672-2
Authors
+ Engineering and Physical Sciences Research Council
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- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/S028617/1
- EP/V026690/1
- Publisher:
- Springer Nature
- Journal:
- Communications Chemistry More from this journal
- Volume:
- 8
- Issue:
- 1
- Article number:
- 268
- Place of publication:
- England
- Publication date:
- 2025-09-01
- Acceptance date:
- 2025-08-21
- DOI:
- EISSN:
-
2399-3669
- Pmid:
-
40890491
- Language:
-
English
- Keywords:
- Pubs id:
-
2285298
- Local pid:
-
pubs:2285298
- Deposit date:
-
2025-09-12
- ARK identifier:
Terms of use
- Copyright holder:
- Lam et al
- Copyright date:
- 2025
- Rights statement:
- © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder
- Licence:
- CC Attribution (CC BY)
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