Chiral Coassembly-Activated CPL Amplification Promoted by Electrostatic and Arene–Perfluoroarene Interactions

Abstract

The strategy for CPL materials with larger glum values has received much attention as the glum value determines the application potential of CPL materials. However, conventional approaches to generate a larger glum value often require complicated molecular synthesis and cause fluorescence to be quenched in the assembly system. Herein, we designed two chiral coassemblies comprising a cationic fluorophore (Py1/Py2), an anionic chiral binaphthylene derivative (R/S-BNP), and octafluoronaphthalene (OFN) via electrostatic and arene–perfluoroarene (AP) interactions. The binary assemblies containing Py1/Py2 and R/S-BNP exhibited poor CPL signals and obvious Cotton effects. Interestingly, R/S-BNP-Py2-OFN displayed enhanced fluorescence with the |glum| value of 0.012, which was attributed to the synergistic effect of electrostatic and AP interactions. This work demonstrates a facile approach to the design of CPL materials and reveals that the synergistic effect may be employed to optimize fluorescence and CPL properties.