Chiral Zero‐Dimensional Hybrid Antimony Chloride with Circularly Polarized Luminescence and Solvent‐Induced Property Regulation

In this study, we synthesized two pairs of enantiomeric Sb3+‐based 0D chiral hybrid metal halides (HMHs), (R/S‐3AP)4SbCl11·DMF and (R/S‐3AP)4SbCl11·ACN, which exhibit efficient circularly polarized luminescence (CPL) emissions with distinct optical properties influenced by the solvent environment. (R/S‐3AP)4SbCl11·DMF displays bright orange luminescence with a photoluminescence quantum yield (PLQY) of 57.1%, while (R/S‐3AP)4SbCl11·ACN emits red luminescence with a PLQY of 17.4%. Notably, (R/S‐3AP)4SbCl11·ACN achieves a maximum dissymmetry factor (|glum|) of 2.27 × 10‐3, attributed to strong hydrogen bonding between organic and inorganic components. Reversible transformations between these two phases via solvent vapor stimulation enable dynamic photoluminescence (PL) switching, highlighting their application in anti‐counterfeiting technology. Furthermore, circularly polarized light‐emitting devices (CPL‐emitting devices) based on these materials were fabricated, achieving a maximum |glum| of 2.01 × 10‐3. These findings underscore the potential of these chiral HMHs for advanced applications in chiral optoelectronics, anti‐counterfeiting, and CPL‐emitting devices.