Abstract
A porphyrin–fullerene covalently linked dyad is studied in solutions and Langmuir–Blodgett (LB) films. The dyad is characterized by a relatively long linker. In benzonitrile, it performs a relatively slow photo-induced electron transfer (ET), k ET ≈5×10 8 s −1 . Being incorporated in an LB film the dyad forms a compact conformer, which takes the smallest surface area. For this conformer the donor–acceptor separation is much shorter as compared with that in liquid phases and the molecule perform a fast photo-induced ET, k ET ≈8×10 9 s −1 . The LB films were studied using time-resolved measurements of fluorescence, absorption, and Maxwell displacement charge.
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