Electron-Induced Decomposition of Uracil-5-yl O-(N,N-dimethylsulfamate): Role of Methylation in Molecular Stability
Abstrakt
The incorporation of modified uracil derivatives into DNA leads to the formation of radical species that induce DNA damage. Molecules of this class have been suggested as radiosensitizers and are still under investigation. In this study, we present the results of dissociative electron attachment to uracil-5-yl O-(N,N-dimethylsulfamate) in the gas phase. We observed the formation of 10 fragment anions in the studied range of electron energies from 0–12 eV. Most of the anions were predominantly formed at the electron energy of about 0 eV. The fragmentation paths were analogous to those observed in uracil-5-yl O-sulfamate, i.e., the methylation did not affect certain bond cleavages (O-C, S-O and S-N), although relative intensities differed. The experimental results are supported by quantum chemical calculations performed at the M06-2X/aug-cc-pVTZ level of theory. Furthermore, a resonance stabilization method was used to theoretically predict the resonance positions of the fragment anions O- and CH3-.
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- Accepted albo Published Version
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
nr 22,
ISSN: 1661-6596 - Język:
- angielski
- Rok wydania:
- 2021
- Opis bibliograficzny:
- Arthur-Baidoo E., Falkiewicz K., Chomicz-Mańka L., Czaja A., Demkowicz S., Biernacki K., Kozak W., Rak J., Denifl S.: Electron-Induced Decomposition of Uracil-5-yl O-(N,N-dimethylsulfamate): Role of Methylation in Molecular Stability// INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES -Vol. 22,iss. 5 (2021), s.2344-
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.3390/ijms22052344
- Źródła finansowania:
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- Austrian Science Fund (FWF), Vienna (P30332)
- Projekt NCN nr: UMO- 2014/14/A/ST4/00405
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 192 razy
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