[60]fullerene-stoppered porphyrinorotaxanes: pronounced elongation of charge-separated-state lifetimes

J Am Chem Soc. 2004 Aug 4;126(30):9156-7. doi: 10.1021/ja047548g.

Abstract

A series of Sauvage-type porphyrinorotaxanes containing [60]fullerene stoppers have been synthesized by a convergent route. Photoinduced energy transfer and electron-transfer reactions in these rotaxanes yield long-distance charge-separated radical-pair states, whose lifetimes in solution at ambient temperatures are as high as 32 mus, depending on the distance between the fullerene and zinc porphyrin chromophores.