Electron paramagnetic resonance study of the paramagnetic centers in gamma-irradiated 2-nitrobenzoic acid single crystal

ÇALIŞKAN B., Caliskan A. C., Tutus Y.

JOURNAL OF MOLECULAR STRUCTURE, vol.1322, 2025 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1322
  • Publication Date: 2025
  • Doi Number: 10.1016/j.molstruc.2024.140322
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Keywords: 2-nitrobenzoic acid (C7H5NO4), EPR, Hyperfine coupling constant, Radiation damage centers, Spectroscopic splitting factor
  • Ankara University Affiliated: No

Abstract

2-nitrobenzoic acid (C7H5NO4) (2NBA) single crystals were made paramagnetic using 60Co-gamma rays. An attempt was made to detect the resonance form formed in 2-nitrobenzoic acid single crystal with Electron Paramagnetic Resonance (EPR) Spectroscopy. EPR spectra were taken at 125 K in three different axes of the crystal. As a result of EPR analysis of gamma irradiated 2NBA single crystal, it was understood that 2NBA anion radical was formed. The principal values of the hyperfine structure constants, the principal values of the g-tensor and their direction cosines were calculated.