Electron paramagnetic resonance of gamma-irradiated single crystals of ethan-1,2 disulfonic acid disodium

Karataş, Özgül; Aras, Erdal

doi:10.1016/j.molstruc.2012.05.075

Cited by 13 publications

(6 citation statements)

References 23 publications

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“…(Sayin et al (2012), Asik et al (2004)). The EPR spectroscopy is one of the most powerful methods for identifying irradiation damage centers over molecules containing unpaired electrons (Dereli et al (2011), Usta et al (2011), Karatas and Aras (2012), Eaton and Eaton (2008), Gordy (1980), Pshezhetskii and Kotov (1973), Atherton (1973)). Furthermore, this method has been in preference for a long time to produce paramagnetic centers for Electron Paramagnetic Resonance (EPR) technique in order to identification of paramagnetic defect centers and also provides a detailed description for structures mentioned above (Karatas et al (2016), Yarbası et al (2011), Yordanov andAleksieva (2019), Sayin et al (2012)).…”

Section: Introductionmentioning

confidence: 99%

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

Karataş

Ceylan

2020

Konya Journal of Engineering Sciences

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A new epoxyisoquinoline sulfonamide as a fused heterocycle compound (I), (4aS,7S,8aR)-8a-bromo-7-methyl-2-tosyl-2,3,4,7,8,8a-hexahydro-1H-4a,7-epoxyisoquinoline was synthesized using green and cascade progress which was then irradiated by 60 Co-gamma () ray source with a dose speed of 0.981 kGy/h at the room temperature for 72h. EPR spectra of I compound were measured at different orientations in magnetic field with X-band EPR spectrometer along the temperatures between 150-340 K. Isotropic spectrum was obtained without depending on temperature and radical structure, ̇3 was observed. Radical was simulated using the Bruker software WinEPR-Simfonia and the experimental isotropic g-value with hyperfine coupling constant of radical was calculated.

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Section: Introductionmentioning

confidence: 99%

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

Karataş

Ceylan

2020

Konya Journal of Engineering Sciences

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“…Therefore, it is important to identify radical structures produced by irradiation. EPR is a powerful spectroscopic method for detecting radicals in the materials [7][8][9][10][11][12][13][14][15][16][17][18]. In this study, Calix [4]arene, labeled calix [4]arene (1), and 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix [4]arene, labeled calix [4]arene(2), were exposed to gamma rays and then radical structures of these calix [4]arenes were evaluated by EPR method.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Influences of Gamma Rays on Calix[4]Arene and 25,27-di(4-Nitrobenzyl)-26,28-Dihydroxycalix[4]Arene: EPR Study

et al. 2017

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In the present study, calix [4]arene and its derivate 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix[4]arene were irradiated for 72 hours by 60 Co gamma rays at dose rate of 0.720 kGy/h. These irradiated samples were analyzed by EPR method and it was found that one type of radical was produced in calix[4]arene, and two type of radicals were produced in 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix[4]arene. The measurements were performed in the temperature range of 273-400 K using x-band EPR spectrometer. It was observed that the spectra, obtained from two samples, have very weak temperature dependence. Hyperfine and g parameters were calculated for two samples.

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“…Sometimes irradiation results in bond scission, degradation of polymer structures [11] and eventually trapped radicals may occur [12]. EPR is a powerful spectroscopic method for detecting radicals in the materials [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Poly(2-Hydroxyethyl~Methacrylate)-co- Poly(4-Vinyl Pyridine) Copolymers [COP2,4] Irradiated: an EPR study

et al. 2016

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Poly(2-hydroxyethyl methacrylate)-co-poly(4-vinyl pyridine) and poly(HEMA)-co-poly-(4-VP) copolymers were synthesized by free radical polymerization. K2S2O8 was used as an initiator. Chain lengths of the copolymer was changed by varying the monomer/initiator ratio. These polymers have molarites of 2.6 and 2.1 respectively and are called COP2 and COP4. The samples were exposed to gamma rays at room temperature. After irradiation, the EPR spectra of COP2 and COP4 were recorded between 120 K and 450 K. From the temperature dependence of the line intensity, it was concluded that unpaired spin concentration in the irradiated samples has been changing with temperature. A theoretical study, presented in this report, was aimed to test success of the machine learning methods and to select the best learning method.

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Electron paramagnetic resonance of gamma-irradiated single crystals of ethan-1,2 disulfonic acid disodium

Cited by 13 publications

References 23 publications

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

X-BAND EPR STUDIES OF GAMMA IRRADIATED A NEW ISOQUINOLINE SULFONAMIDE: C17H20BrNO3S

Comparative Study of Influences of Gamma Rays on Calix[4]Arene and 25,27-di(4-Nitrobenzyl)-26,28-Dihydroxycalix[4]Arene: EPR Study

Analysis of Poly(2-Hydroxyethyl~Methacrylate)-co- Poly(4-Vinyl Pyridine) Copolymers [COP2,4] Irradiated: an EPR study

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