Gap-filling functionality of energy transmitter on cascade energy transfer in a unimolecular anthracene/perylene/rhodamine system

This work reports an intriguing finding that a newly designed anthracene/perylene/rhodamine system makes it possible to achieve efficient cascade energy transfer. The results of comparative spectroscopic studies on the protonated compounds provided a direct proof that the perylene dye can promote gap-filling functionality as an energy transmitter to enhance overall efficiency for the energy flow.