Mechanically Controlled and Consecutively Boosted Circularly Polarized Luminescence of Nanoassemblies from Achiral Molecules
Yutao Sang, Dong Yang, Zhaocun Shen, Pengfei Duan, Minghua Liu
Abstract
Consecutively boosted circularly polarized luminescence (CPL) with controlled handedness has been demonstrated in a supramolecular assembly from a completely achiral molecule. It is found that achiral C3 symmetric molecules exhibit strong supramolecular chirality as well as CPL through a vortex-accompanied assembly method. Surprisingly, the remarkable chiroptical property and the excited energy of the achiral molecules can be further transferred to another achiral dye, resulting in an amplified CPL with a dissymmetry factor over 0.1. This work not only provides a scenario for realizing the emergence, amplification, and transfer of CPL in the supramolecular system from achiral molecules, but also paves an easy yet efficient way to construct a strong and tunable circularly polarized emission based on the coupling with achiral fluorophores.