Enhanced Circularly Polarized Luminescence of Intermolecular Charge‐Transfer Complexes Through AIEgen‐based Chiral MOF‐Guest Systems

ABSTRACT

Circularly polarized luminescence (CPL) materials are of significant interest in applications such as three‐dimensional displays, light‐emitting devices, and information‐encrypted memories. The chiral intermolecular charge‐transfer (CT) complex is an emerging candidate for high‐performance CPL materials because of their large luminescence dissymmetry factor ( g _lum ) and facile modulation of CPL colors. Achieving high luminescence efficiency ( Ф _PL ) in chiral intermolecular CT complex is challenging due to substantial non‐radiative decay. Herein, we report a innovative strategy to construct space‐confined chiral intermolecular CT complex by introducing electron‐rich donors into chiral metal–organic framework (MOF) with aggregation‐induced emission luminogen (AIEgen) ligand (acceptor). The MOF‐guest chiral CT complexes exhibit high g _lum (up to −1.1 × 10 ⁻² ), excellent Φ _PL (up to 30%), and readily tunable full‐color emission. The overall performance improvement is attributed to strong CT interactions between AIEgen acceptor and donors within a rigid environment. Moreover, spatially segregated multicolor heterostructure crystal can be synthesized through epitaxial growth, which enables effective mono‐directional chiral signal transfer by adjusting the energy transfer between adjacent domains. The microscale chiroptical logic gate based on the heterostructure crystal confirms its potential application in integrated optical circuit devices. These findings offer valuable insights for the development and application of high‐performance CPL materials based on CT complexes.