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 (kENT=1.04×109 s−1) and efficient (ΦEXT=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 (see picture).