Chiral‐Identified Multicolor‐Tunable Photoluminescence via Excitation‐Wavelength Modulation in 0D Antimony(III) Enantiomers for Multilevel Anti‐Counterfeiting

Abstract Despite increasing research interests in chiral hybrid metal halides for photonic applications, the chiral‐identified multicolor‐tunable photoluminescence (PL) remains a fundamental challenge for multilevel anti‐counterfeiting. Herein, 0D antimony(III) enantiomers, ( R / S ‐C 5 H 14 N 2 ) 2 SbCl 5 ·2Cl, are designed and synthesized via chiral induction using R / S ‐3‐aminopiperidine dihydrochloride as structural templates. Hydrogen bonding networks between C 5 H 14 N 2 + and [SbCl 5 ] 2− contribute to the chiral helical structures with distinct asymmetry factors, facilitating efficient chiral transfer across organic–inorganic interfaces. Incredibly, R ‐ and S ‐enantiomers exhibit an unprecedented excitation‐dependent PL behavior with chiral differentiation, leading to multicolor‐tunable emissions across the visible‐light spectrum, from blue to white to yellow. This originates from the competitive transitions between the triplet‐state ( 3 P n →S 0 ) self‐trapped excitons (STEs) of [SbCl 5 ] 2− and the singlet‐state (S 1 →S 0 ) fluorescence of R / S ‐C 5 H 14 N 2 + . Beyond that, chiral organic ligands break the inorganic symmetry, facilitating spin–orbit coupling and excited‐state splitting of R ‐ and S ‐enantiomers, which governs the electron absorption transitions to achieve the chiral‐identified multicolor‐tunable PL. These materials are further employed in multilevel anti‐counterfeiting by fabricating these precise images into periodic pixel arrays. This work establishes a paradigm for designing eco‐friendly chiral emitters with superior PL tunability, as well as provides fundamental insight into multi‐channel radiative transition mechanisms.