Chemical Physics Letters, Vol.319, No.3-4, 309-317, 2000
Reactions of photoexcited C-60 with weak organic acids. Novel method for the derivatization of fullerenes
Pyrex-filtered irradiation of C-60 solutions in liquid diphenylmethane in the absence of oxygen is shown to result in Ph,CH. radicals, which further react with the electron-deficient C-60 to give Ph2CH-C60Hn (n = 1, 3, 5). The fullerene ground state to C-3(60) transition is suggested to be accompanied by the increase of the fullerene solvation affecting thus the acidity of methylene hydrogens in Ph2CH2 as well as the feasibility of their dissociation. Also, photolysis of C-60 solutions in weakly acidic phenylacetylene is shown to lead to the addition of a varying number of phenylethinyl groups to the fullerene core.