Simultaneous electrochemical and electron paramagnetic resonance studies of fullerene anion radicals and C-60(1-) C-60(3-)

Simultaneous electrochemical and electron paramagnetic resonance experiments have been carried out on the reduced C-60,, fullerene to examine the g-factor assignment of the radical species. C-60(1-) and C-60(3-) show the following EPR characteristics at room temperature: C-60(1-): g(1-) = 2.0002 +/- 0.0001, 2 Delta B-1s = 0.17 mT, and C-60(3-): g(3-) = 2.0008 +/- 0.0001, 2 Delta B-1s = 0.07 mT. EPR linewidths are apparently narrower compared to those in most of the spectra previously reported. Variable temperature EPR study on solution containing C-60(1-) has shown that g(1-) value is not while the linewidth is only slightly temperature dependent.