Low temperature radiolysis of fullerene C60 and its solutions in isopropylbenzene and N-vinylpyrrolidone

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Abstract
Low-temperature (77 K) radiolysis of solid fullerene C60 and its glassy solutions in isopropylbenzene (IPB) and N-vinylpyrrolidone (N-VP) has been investigated with the use of ESR spectroscopy. Radiationchemical yields for the formation of paramagnetic centers (G PMC, 1/100 eV) have been determined to be ∼0.001 for pure fullerene and 0.3 and 0.7 for its solutions in IPB and N-VP, respectively. The low value of G PMC for fullerene indicates a high stability of this form of carbon. The increase in G PMC in solutions as compared to the pure solvents (0.15 for IPB and 0.3 for N-VP) indicates the sensitizing effect of C60.

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