Photoinduced Charge Separation and Charge Recombination to a Triplet State in a Carotene-Porphyrin-Fullerene Triad

摘要

A molecular triad consisting of a diarylporphyrin (P) covalently linked to a carotenoid polyene (C) and a fullerene (C_60) has been prepared and studied using time-resolved spectroscopic methods. In 2-methyltetrahydrofuran solution, the triad undergoes photoinduced electron transfer to yield C-P~+-c_60~-, which evolves into C~+ -P- C_60~- with an overall quantum yield of 0.14.