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

ABSTRACT

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 450 K. The spectra have been found to be temperature-dependent. The EPR parameters of the 3NAP anion radical have been evaluated.

KEYWORDS:

• Electron paramagnetic resonance
• 3-nitroacetophenone
• radiation damage center
• hyperfine coupling constant
• spectroscopic splitting factor

Acknowledgement

The author is grateful to Professor Zeynel Kılıç for his support and encouragement.

Disclosure statement

No potential conflict of interest was reported by the authors.