An. Pushkin et al., Chemical modification and NaOH, P2O5, PCl5, and AlCl3 admixture effects onthe rate of oxidation of fullerene C-60 by molecular oxygen, RUSS J PH C, 73(9), 1999, pp. 1397-1402
Sodium hydroxide catalytically accelerated and P2O5, PCl5, and AlCl3 strong
ly inhibited oxidation of fullerene C-60 by molecular oxygen. Acid admixtur
es deposited by vaporization at 573 K on crystalline fullerene increased th
e temperature of the onset of oxidation by 60-80 K. Hydroxylation of fuller
ene by dilute H2SO4 With the formation of C-60(OH)(x) had virtually no effe
ct on the rate of its oxidation, whereas hydrogenation with hydrogen at 393
K to C-60(H)(y) sharply decelerated the reaction at temperatures up to 753
K and accelerated it at higher temperatures the apparent activation energy
(578 kJ/mol, i.e., close to the dissociation energy of aromatic C-C bonds)
, however, remained constant.