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Multi-photon and electron impact ionisation studies of reactivity in adenine-water clusters

Barc, B., Ryszka, M., Poully, J.-C., Jabbour Al Maalouf, E., El Otell, Z., Tabet, J., Parajuli, R., Van Der Burgt, P.J.M., Limão-Vieira, P., Cahillane, P., and others. (2014) Multi-photon and electron impact ionisation studies of reactivity in adenine-water clusters. International Journal of Mass Spectrometry, 365-36 . pp. 194-199. ISSN 1387-3806. (doi:10.1016/j.ijms.2014.01.007) (KAR id:74702)

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Abstract

Multi-photon ionisation (MPI) and electron impact ionisation (EII) mass spectrometry experiments have been carried out to probe unimolecular and intermolecular reactivities in hydrated adenine clusters. The effects of clustering with water on fragment ion production from adenine have been studied for the first time. While the observation of NH4+ fragments indicated the dissociation of protonated adenine, the dominant hydration effects were enhanced C4H4N4 + production and the suppression of dissociative ionisation pathways with high activation energies. These observations can be attributed to energy removal from the excited adenine radical cation via cluster dissociation. Comparisons of MPI and EII measurements provided the first experimental evidence supporting hypoxanthine formation in adenine-water clusters via theoretically predicted barrierless deamination reactions in closed shell complexes.

Item Type: Article
DOI/Identification number: 10.1016/j.ijms.2014.01.007
Uncontrolled keywords: Adenine, Cluster, Dissociative ionisation, Electron impact ionisation, Hypoxanthine, Multi-photon ionisation
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Nigel Mason
Date Deposited: 11 Jul 2019 08:56 UTC
Last Modified: 11 Jul 2019 08:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/74702 (The current URI for this page, for reference purposes)
Mason, Nigel: https://orcid.org/0000-0002-4468-8324
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