EPR study of radiation damage in gamma-irradiated 3-nitroacetophenone single crystal

ÇALIŞKAN B., Caliskan A. C.

RADIATION EFFECTS AND DEFECTS IN SOLIDS, cilt.172, ss.398-410, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 172
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1080/10420150.2017.1320800
  • Dergi Adı: RADIATION EFFECTS AND DEFECTS IN SOLIDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.398-410
  • Anahtar Kelimeler: Electron paramagnetic resonance, 3-nitroacetophenone, radiation damage center, hyperfine coupling constant, spectroscopic splitting factor, ELECTRON-SPIN-RESONANCE, NITRO-RADICAL-ANIONS, PARAMAGNETIC-RESONANCE, INTERNAL-ROTATION, PULSE-RADIOLYSIS, NITROAROMATIC COMPOUNDS, OXIDATIVE DENITRATION, CYCLIC VOLTAMMETRY, NEGATIVE-ION, OH RADICALS
  • Gazi Üniversitesi Adresli: Evet

Özet

This paper presents the results of the electron paramagnetic resonance (EPR) study of the anion radical formed from 3-nitroacetophenone (C8H7NO3) (3NAP) single crystal, by gamma irradiation. The EPR spectra of gamma-irradiated single crystals of 3NAP have been recorded at 10-degree intervals for different orientations of crystals in a magnetic field, at room temperature. The EPR analysis of gamma-irradiated crystals of 3NAP has shown that the radiation damage center produced by gamma irradiation is the carbon-centered 3NAP anion radical. One-electron reduction of 3NAP results in general bond loosening. The single crystals have been investigated between 120 and 450K. The spectra have been found to be temperature-dependent. The EPR parameters of the 3NAP anion radical have been evaluated.