Supramolecular energy transfer from photoexcited chlorosomal zinc porphyrin self-aggregates to a chlorin or bacteriochlorin monomer as models of main light-harvesting antenna systems in green photosynthetic bacteria

Self-aggregates of a synthetic zinc porphyrin worked as a light absorber and photoexcited energy donor, transferred the collected energy to a small amount of 3-acetyl-(bacterio)chlorin monomer, and induced near-infrared fluorescence from the acceptors in aqueous micellar solution. These artificial supramolecular systems are novel models of the main light-harvesting antennas of green photosynthetic bacteria, chlorosomes.

Graphical abstractModels of main light-harvesting antennas in green photosynthetic bacteria, chlorosomes were artificially constructed. Singlet energy transfer was observed from photoexcited chlorosomal zinc porphyrin self-aggregates to nearby (bacterio)chlorin monomer emitting (near-infra)red light.Figure optionsDownload full-size imageDownload as PowerPoint slide