Electron Paramagnetic Resonance Study of the Radiation Damage in Trans-Chalcone Single Crystal
B. Caliskana, A. Cengiz Caliskanb
aDepartment of Physics, Faculty of Arts and Science, Pamukkale University, 20070, Kinikli, Denizli, Turkey
bDepartment of Chemistry, Faculty of Science, Gazi University, 06500, Ankara, Turkey
Received: June 29, 2018; revised version October 2, 2018; in final form November 27, 2018
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Gamma irradiated trans-chalcone (C15H12O) single crystals are investigated at 120 K using electron paramagnetic resonance technique. Trans-chalcone single crystals are irradiated with 60Co-γ rays, at room temperature. The EPR spectra of gamma irradiated trans-chalcone single crystals are studied for different orientations of crystals in a magnetic field. The spectra are found to be temperature independent. The structure of the radical produced by γ-irradiation of a single crystal of trans-chalcone is discussed. The investigation of EPR spectra of gamma-irradiated single crystals of trans-chalcone shows the presence of two trans-chalcone anion radicals. The two trans-chalcone anion radicals are created by the scission of the carbon-oxygen double bond. The reduction of trans-chalcone is identified which is formed by the addition of an electron to oxygen of the formed C-O bond. The principal values of the hyperfine coupling tensors of the unpaired electron and the principal values of the g-tensors and direction cosines of the radiation damage centers are determined. The results are found to be in good agreement with the existing literature.

topics: EPR, trans-chalcone (C15H12O), spectroscopic splitting factor, hyperfine coupling constant, radiation damage center