Intense redox-driven chiroptical switching with a 580 mV hysteresis actuated through reversible dimerization of an azoniahelicene.
Jochen R BrandtLubomír PospíšilLucie BednárováRosenildo Correa da CostaAndrew J P WhiteTadashi MoriFilip TeplýMatthew John FuchterPublished in: Chemical communications (Cambridge, England) (2018)
Electrochemical reduction of an azoniahelicene affords a dimer, accompanied by a strong change in the electronic circular dichroism. The fast dimerisation event leads to a >500 mV shift of the oxidation potential, affording a large area of bistability, where the chiroptical signal only depends on the redox history.