Interfacial Self-Assembly of a Chiral Pyrene Exciplex into a Superhelix with Enhanced Circularly Polarized Luminescence

We found that the interfacially confined self-assembly of pyrene and phenanthrene glutamides can form strong exciplexes and amorphous superhelices, which show intensity-enhanced and sign-inverted CPL activity with improved quantum yield compared to a pyrene excimer. This work unveils the predominant role of supramolecular nanostructures over molecular configurations on CPL performance. A 2D interfacially confined exciplex produces unprecedented amorphous superhelices with PLQY-improved, intensity-enhanced and sign-inverted CPL activity.