Supramolecular Assembly of Photoactive Porphyrin-Fullerene Dyads and Triads

Abstract

The supramolecular attraction of fullerenes, such as C60 and C70, to porphyrins has been used as a recognition element in the formation of donor (porphyrin)-acceptor (fullerene) complexes in the solid state and in molecular bis-porphyrin hosts. 1 In this paper we present recent studies of the roles of linker, porphyrin substituent, metallation and solvent on the magnitude of fullerene binding constants in bis-porphyrin hosts(1). 2 These hostguest complexes can exhibit photoinduced electron transfer, PET, (porphyrin to C60) upon photoexcitation, which is of interest in the construction of photovoltaic devices.