Light-Harvesting and Energy-Transfer System Based on Self-Assembling Perylene Diimide-Appended Hexaazatriphenylene

[reaction: see text]. Six perylene diimide-appended hexaazatriphenylene, HAT-PDI(6), was self-assembled in both solution and film state to form a highly stabilized dimer aggregate, in which an efficient energy transfer occurs from the hexaazatriphenylene core to the perylene-diimide moiety.