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

ABSTRACT

Bis(cyclopentadienyl)zirconium dichloride (BCZD; zirconocene dichloride) single crystals were exposed to ⁶⁰Co-γ 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.

KEYWORDS:

• EPR
• bis(cyclopentadienyl) zirconium dichloride (BCZD)
• radiation damage center
• paramagnetic center
• hyperfine coupling constant
• spectroscopic splitting factor

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Betul Caliskan http://orcid.org/0000-0001-6748-1169

Additional information

Funding

This work was supported by The BAP of Pamukkale University  [grant number 2008BSP011].