EPR study of free radical in gamma-irradiated bis(cyclopentadienyl)zirconium dichloride single crystal


ÇALIŞKAN B., Caliskan A. C.

RADIATION EFFECTS AND DEFECTS IN SOLIDS, vol.172, pp.507-516, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 172
  • Publication Date: 2017
  • Doi Number: 10.1080/10420150.2017.1346652
  • Title of Journal : RADIATION EFFECTS AND DEFECTS IN SOLIDS
  • Page Numbers: pp.507-516
  • Keywords: EPR, bis(cyclopentadienyl)zirconium dichloride (BCZD), radiation damage center, paramagnetic center, hyperfine coupling constant, spectroscopic splitting factor, ELECTRON-SPIN-RESONANCE, MIXED-SANDWICH COMPOUNDS, CYCLOPENTADIENYL RADICALS, HYDROCARBON RADICALS, RING INVERSION, ESR-SPECTRA, CYCLOHEXADIENYL, CYCLOHEPTATRIENYL, DEGENERACY, PHOTOLYSIS

Abstract

Bis(cyclopentadienyl) zirconium dichloride (BCZD; zirconocene dichloride) single crystals were exposed to Co-60-gamma. irradiation at room temperature. The irradiated single crystals were investigated between 125 and 470 K by electron paramagnetic resonance spectroscopy. The spectra of the crystals were found to be temperature independent. The paramagnetic center was attributed to the cyclopentadienyl radical. The g values of the radiation damage center observed in BCZD single crystal and the hyperfine structure constants of the free electron with nearby protons were obtained.