Analysis of the ESR spectra of the similar to CF2CFCF2 similar to macroradical trapped in a gamma-irradiated polytetrafluoroethylene matrix at 77 K

The p-fluorine atoms in the similar to CF(2)dFCF(2)similar to radical trapp ed in gamma-irradiated polytetrafluoroethylene (PTFE) were found to be none quivalent and, hence, responsible for a doublet-triplet-triplet ESR spectra l pattern. The conformational angle between the axis of the unpaired-electr on orbital and the projection of C-beta-C-gamma bond is equal to 60 degrees . The hyperfine coupling constants for alpha- and beta-fluorine atoms were determined. The hyperfine splitting constants for two equivalent beta-fluor ine atoms were found to be 7.2 mT. The corresponding value for the two othe r equivalent fluorine atoms is 1.8 mT, whereas the hyperfine splitting due to alpha-fluorine atom is 23.8 mT.