A Large Dendritic Multiporphyrin Array as a Mimic of the Bacterial Light-Harvesting Antenna Complex: Molecular Design of an Efficient Energy Funnel for Visible Photons

Abstract

π-Electronic conjugation is not necessary to facilitate long-range energy migration and transfer: A rapid (k_ENT =1.04×10⁹ s^-1 ) and efficient (Φ_EXT =71 %) energy transfer from the 28 photoexcited zinc porphyrin units to the focal free-base porphyrin unit occurs in a large, star-shaped dendritic multiporphyrin array in which the chromophore units are linked through flexible ether groups.