Preferential Through-Space Charge Separation and Charge Recombination in V-Type Configured Porphyrin–azaBODIPY–Fullerene Supramolecular Triads

Abstract

Electron transfer is one of the most fundamental and prevalent processes occurring in chemistry, physics, and biology. In donor–acceptor systems with one of the partners’ a photosensitizer, upon photoexcitation, transfer of an electron between the photoexcited and ground-state molecules occurs. Factors affecting the geometry, energetics, and dynamics of this process have been one of the intensively studied scientific topics, often by building model donor–acceptor conjugates or by utilizing natural systems. A wealth of information, applicable to almost all areas of modern science and technology, has been generated from these studies. In the present study, we demonstrate preferential through-space charge separation and charge recombination in supramolecular triads composed of porphyrin (free-base, zinc, or magnesium at the central cavity) as excited-state electron donor, BF2-chealted azadipyrromethene (azaBODIPY), and fullerene (C60) as electron acceptors. Because of spatial close proximity of the terminal ...