Dendronized Fullerene–Porphyrin Conjugates in ortho,meta, and para Positions: A Charge‐Transfer Assay

The physicochemical characterization, that is, ground and excited state, of a new series of dendronized porphyrin/fullerene electron donor–acceptor conjugates in nonaqueous and aqueous environments is reported. In contrast to previous work, we detail the charge‐separation and charge‐recombination dynamics in zinc and copper metalloporphyrins as a function of first‐ and second‐generation dendrons as well as a function of ortho, meta, and para substitution. Both have an appreciable impact on the microenvironments of the redox‐active constituents, namely the porphyrins and the fullerenes. As a matter of fact, the resulting charge‐transfer dynamics were considerably impacted by the interplay between the associated forces that reach from dendron‐induced shielding to dipole–charge interactions.