The presence of a second C-60 cage in C-60-exTTF-C-60 triads [exTTF = 9,10-bis(1,3-dithiol-2-ylidene)-9,10-anthraquinone] has beneficial effects on the stabilization of the radical ion pair formed upon irradiation in comparison with the related C-60-exTTF dyad. Although C-60-exTTF-C60 ensembles show no electronic interaction between the electroactive units in the ground state, their irradiation leads to C60(.-)exTTF(.+)-C-60 species with lifetimes on the order of 600 ns in benzonitrile; these lifetimes are twice those determined for the analogous C-60-exTTF dyad.
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