Pregled bibliografske jedinice broj: 439412
Radiation-induced formation of sigma radicals in crystals of thiothymine
Radiation-induced formation of sigma radicals in crystals of thiothymine // 7TH Int. Summer School of Biophysics, Supramolecular Structure and Function, Rovinj, 2000
Rovinj, Hrvatska, 2000. str. 76-76 (poster, nije recenziran, sažetak, znanstveni)
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Naslov
Radiation-induced formation of sigma radicals in crystals of thiothymine
Autori
Bešić, Erim ; Herak, Janko ; Sanković, Krešimir
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
7TH Int. Summer School of Biophysics, Supramolecular Structure and Function, Rovinj, 2000
/ - , 2000, 76-76
Skup
7TH Int. Summer School of Biophysics, Supramolecular Structure and Function, Rovinj 2000
Mjesto i datum
Rovinj, Hrvatska, 14.09.2000. - 26.09.2000
Vrsta sudjelovanja
Poster
Vrsta recenzije
Nije recenziran
Ključne riječi
EPR spectroscopy; sigma-radicals; 2-thiothymine
Sažetak
Thioanalogs of the nucleic-acid bases are known photosensitive probes and good traps of radiation energy. Radiation-induced sulfur-centered free radicals stabilized on the base thioanalogs molecules are of the cationic origin. Their electronic conÐguration is of the p type, unless an electron-donating group, like Cl, is added to the sulfur atom, forming the rr* threeelectron ÏÏ SKCl bond. The r radical observed in irradiated 2- thiothymine is formed simply by deprotonation of the pristine cation radical. The 2r character of the radical is determined from the nature of the g tensor and the A(14N) coupling tensor and their relation to the radical skeleton. The deprotonation of the cation radical takes place at N(3) rather than at N(1), generally observed in the irradiated pyrimidine natural bases and their other thioanalogs.
Izvorni jezik
Engleski
Znanstvena područja
Fizika, Kemija
