Chiral Coassembly-Activated CPL Amplification Promoted by Electrostatic and Arene–Perfluoroarene Interactions
Shijie Yang, Fei Li, Qihuan Li, Jinsong Han, Yixiang Cheng
Abstract
The strategy for CPL materials with larger g lum values has received much attention as the g lum value determines the application potential of CPL materials. However, conventional approaches to generate a larger g lum 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 | g lum | 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.