Electron paramagnetic resonance study of the paramagnetic center in gamma-irradiated tetrahydrophthalic anhydride single crystal

Caliskan A. C.

RADIATION EFFECTS AND DEFECTS IN SOLIDS, cilt.175, sa.11-12, ss.1071-1082, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 175 Sayı: 11-12
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/10420150.2020.1799375
  • Dergi Adı: RADIATION EFFECTS AND DEFECTS IN SOLIDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1071-1082
  • Anahtar Kelimeler: EPR, tetrahydrophthalic anhydride (C8H8O3), THPA, spectroscopic splitting factor, hyperfine coupling constant, radiation damage center, SPIN-RESONANCE, RADIATION-DAMAGE, THYMINE DERIVATIVES, SUCCINIC ANHYDRIDE, RADICAL ANIONS, EPR, OXIDATION, SPECTRA, ANILINE, RING
  • Gazi Üniversitesi Adresli: Evet

Özet

Electron Paramagnetic Resonance (EPR) analysis of gamma-irradiated tetrahydrophthalic anhydride (C8H8O3) single crystals was performed at 120 K. The single crystals were exposed to(60)Co-gamma source at room temperature. The EPR spectra of gamma-irradiated single crystals of tetrahydrophthalic anhydride (THPA) were recorded at 10-degree intervals for different orientations of crystals in a magnetic field. Detailed examination of THPA single crystals by EPR spectroscopy method showed the presence of two carbon-centered THPA anion radicals. Both radicals were determined to have the same structure. The anion radicals observed in gamma-irradiated THPA single crystal were created by the scission of the carbon-oxygen double bond. Thegvalues of the radiation damage centers observed in the THPA single crystal and the hyperfine structure constants of the free electron with nearby protons were obtained.