An EPR Study On Cytosine Irradiated

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dc.contributor.authorUsta, Ayhan
dc.contributor.authorVural, Hasibe Cingilli
dc.contributor.authorUsta, Keziban
dc.contributor.authorAras, Erdal
dc.contributor.authorCeylan, Yusuf
dc.contributor.authorOzmen, Ayhan
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2011
dc.departmentNiğde ÖHÜ
dc.description.abstractIn this study, paramagnetic centers over the cytosine were formed by photolysis then these centers were investigated using EPR method. EPR signals were not recorded from non-irradiated the cytosine, but irradiated polycrystalline exhibited complex EPR spectra. For obtaining of cytosine polycrystalline, novel crystallization method was performed on powder cytosine. Effective crystallization conditions were achieved by adjustment of the concentration of the metal ions, chemical solutions, NaCl, KCl, glacial asetic acid, nitric oxide, percloric acid, glutamic acid, and pH of buffer. Cytosine (C4H5N2O) polycrystalline obtained were irradiated with Co-60 - rays at room temperature for 24 and 72 h. At the sample irradiated for 72 h, the paramagnetic centers were determined between 120 and 450 K by X-band EPR spectrometer. The spectra were found to be dependent slightly on temperature. Two cation radicals were determined in the structure and these were called Radicals I and II. The g and hyperfine constants were found to be a(H2a) = 61 G, a(N2) = 9.39 G, a(N1) = 7.15 G, and g(1) = 2.0026 for the Radical I; a(H3) = 10.57 G, a(H1) = 3 G, a(N3) = 6.72 G, a(N1) = 5.36 G for, and g(2) = 2.0034 the Radical II. Copyright (C) 2010 John Wiley & Sons, Ltd.
dc.description.sponsorshipScientific Research Projects Coordination Center of Selcuk University, Konya/Turkey
dc.description.sponsorshipThis study was partially supported by the Scientific Research Projects Coordination Center of Selcuk University, Konya/Turkey.
dc.identifier.doi10.1002/poc.1801
dc.identifier.endpage639
dc.identifier.issn0894-3230
dc.identifier.issn1099-1395
dc.identifier.issue8
dc.identifier.scopus2-s2.0-79960365231
dc.identifier.scopusqualityQ3
dc.identifier.startpage635
dc.identifier.urihttps://dx.doi.org/10.1002/poc.1801
dc.identifier.urihttps://hdl.handle.net/11480/4702
dc.identifier.volume24
dc.identifier.wosWOS:000293594100004
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherWILEY
dc.relation.ispartofJOURNAL OF PHYSICAL ORGANIC CHEMISTRY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectcrystallization
dc.subjectcytosine
dc.subjectEPR
dc.subjectfree radical
dc.subjectirradiation
dc.titleAn EPR Study On Cytosine Irradiated
dc.typeArticle

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