ArticleInternational journal of molecular sciences2023
Electron-Induced Decomposition of 5-Bromo-4-thiouracil and 5-Bromo-4-thio-2'-deoxyuridine: The Effect of the Deoxyribose Moiety on Dissociative Electron Attachment.
Article in International journal of molecular sciences, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 3 citations in OpenAlex.
- Dissociative Electron Attachment to 8-(Trifluoromethyl)thioadenine: A Potential Radiosensitizer.The journal of physical chemistry. B · 2026Article
- Surprising Radiolytic Stability of 8-Thiomethyladenine in an Aqueous Solution.The journal of physical chemistry. B · 2024Article
- Dissociative Electron Attachment to 5-Iodo-4-thio-2'-deoxyuridine: A Potential Radiosensitizer of Hypoxic Cells.The journal of physical chemistry letters · 2023Article
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
Abstract
When modified uridine derivatives are incorporated into DNA, radical species may form that cause DNA damage. This category of molecules has been proposed as radiosensitizers and is currently being researched. Here, we study electron attachment to 5-bromo-4-thiouracil (BrSU), a uracil derivative, and 5-bromo-4-thio-2'-deoxyuridine (BrSdU), with an attached deoxyribose moiety via the N-glycosidic (N1-C) bond. Quadrupole mass spectrometry was used to detect the anionic products of dissociative electron attachment (DEA), and the experimental results were supported by quantum chemical calculations performed at the M062X/aug-cc-pVTZ level of theory. Experimentally, we found that BrSU predominantly captures low-energy electrons with kinetic energies near 0 eV, though the abundance of bromine anions was rather low compared to a similar experiment with bromouracil. We suggest that, for this reaction channel, proton-transfer reactions in the transient negative ions limit the release of bromine anions.
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Registered trials
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