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Pregled bibliografske jedinice broj: 439402

EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K


Bešić, Erim
EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K // Journal of Molecular Structure, 917 (2009), 2-3; 71-75 doi:10.1016/j.molstruc.2008.06.027 (međunarodna recenzija, članak, znanstveni)


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Naslov
EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K

Autori
Bešić, Erim

Izvornik
Journal of Molecular Structure (0022-2860) 917 (2009), 2-3; 71-75

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
5-yl radicals; 7-yl radicals; EPR spectroscopy; 2-thiothymine

Sažetak
EPR spectroscopy has been used for the study of the free radicals formed in the single crystals of 2-thiothymine (5-methyl-2-thiouracil) -irradiated at room temperature (300 K). The radicals formed by a net hydrogen-atom addition to C(6) (5-thymyl or 5-yl radicals) and by a net hydrogen abstraction from the methyl group (7-thymyl or 7-yl radicals) has been studied in detail. The hyperfine tensors of proton couplings in these radicals are given together with their g-tensors. It has been shown that the calculated hyperfine proton couplings and relative orientation of the coupling tensors along the pyrimidine ring are similar to those observed earlier in 5-yl and 7-yl radicals in the single crystals of thymine and its derivatives. Although no large differences in hyperfine couplings were found, calculated values of the g-tensor elements of the 5-yl radical are appreciable larger, what is expected due to the presence of sulfur at C(2) in 2-thiothymine. Also, the observed superhyperfine 1:2:2:1 splitting of the resonance lines of the 5-yl radical indicated that the presence of sulfur in 2-thiothymine slightly affects the spin distribution in this radical insomuch that appreciable amount of spin is located on one of N-H fragments of 2-thiothymine.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Biologija



POVEZANOST RADA


Projekt / tema
0006421

Ustanove
Farmaceutsko-biokemijski fakultet, Zagreb

Profili:

Avatar Url Erim Bešić (autor)

Citiraj ovu publikaciju

Bešić, Erim
EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K // Journal of Molecular Structure, 917 (2009), 2-3; 71-75 doi:10.1016/j.molstruc.2008.06.027 (međunarodna recenzija, članak, znanstveni)
Bešić, E. (2009) EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K. Journal of Molecular Structure, 917 (2-3), 71-75 doi:10.1016/j.molstruc.2008.06.027.
@article{article, author = {Be\v{s}i\'{c}, E.}, year = {2009}, pages = {71-75}, DOI = {10.1016/j.molstruc.2008.06.027}, keywords = {5-yl radicals, 7-yl radicals, EPR spectroscopy, 2-thiothymine}, journal = {Journal of Molecular Structure}, doi = {10.1016/j.molstruc.2008.06.027}, volume = {917}, number = {2-3}, issn = {0022-2860}, title = {EPR study of free radicals in the single crystals of 2-thiothymine gamma-irradiated at 300 K}, keyword = {5-yl radicals, 7-yl radicals, EPR spectroscopy, 2-thiothymine} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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