Synthesis and photophysical properties of porphyrin-fullerene dyads.

摘要

There has been substantial interest in dyads in which C₆₀ is covalently linked to electron donor molecules that absorb strongly in the visible region, especially porphyrins. These compounds have potential applications as photosynthetic mimics and energy storage devices. The synthesis and photophysics of molecules where the porphyrin is linked to the fullerene with a flexible linkage, a rigid linkage, and a non-covalent linkage are reported. These molecules allow the study of the effects of varying molecular topologies on electron transfer properties. Long flexible spacers linking the donor and acceptor allow the strong π-π interactions between the fullerene and porphyrin to bring the two moieties close together, allowing through-space electron transfer. Rigid linkers are used to increase interchromophoric separation and favor a through-bond interaction between donor and acceptor. Specially designed donors and acceptors have been combined to form supramolecular architectures in which the fullerene and porphyrin moieties are not covalently linked to one another. These novel compounds have been fully characterized.