Pandey, R., Ryszka, M., da Fonseca Cunha, T., Lalande, M., Dampc, M., Limão-Vieira, P., Mason, N.J., Poully, J.C., Eden, S. (2017) Threshold behavior in metastable dissociation of multi-photon ionized thymine and uracil. Chemical Physics Letters, 684 . pp. 233-238. ISSN 0009-2614. (doi:10.1016/j.cplett.2017.06.051) (KAR id:74655)
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| Official URL: https://dx.doi.org/10.1016/j.cplett.2017.06.051 |
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Abstract
Microsecond-timescale HNCO loss has been observed from single-color multi-photon ionized pyrimidine nucleobases in the gas phase. Photon energy thresholds for the metastable channels have been measured at 5.55 ± 0.02 eV for thymine and 5.57 ± 0.02 eV for uracil. We argue that these results can be attributed to accessing the molecules’ S1 states with additional vibrational energy matching the threshold energy for HNCO loss from the radical cation. Combined with previous photoionization energies, this enables the S1 adiabatic energies to be deduced: 3.67 ± 0.07 eV for thymine and 3.77 ± 0.07 eV for uracil. These values are consistent with recent calculations.
| Item Type: | Article |
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| DOI/Identification number: | 10.1016/j.cplett.2017.06.051 |
| Uncontrolled keywords: | Mass spectrometry, Metastable fragmentation, Multi-photon ionization, Pyrimidine nucleobases, Thymine, Uracil, Aromatic compounds, Ionization, Ionization of gases, Mass spectrometry, Photons, Metastable fragmentation, Multiphoton ionization, Nucleobases, Thymine, Uracil, Photoionization |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Depositing User: | Nigel Mason |
| Date Deposited: | 02 Jul 2019 10:09 UTC |
| Last Modified: | 05 Nov 2024 12:37 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/74655 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Mason, N.J..
| Creator's ORCID: |
 https://orcid.org/0000-0002-4468-8324
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