Reversible Circularly Polarized Luminescence Response of Chiral Antimony-Based Hybrid Halides and Its Applications in Information Anti-Counterfeiting and CP-LED

Stimuli-responsive circularly polarized luminescent materials have broad application prospects in fields such as information encryption and anti-counterfeiting, chiral optoelectronic devices and so on. In this study, 0D antimony-based halides enantiomer R-DMSO and S-DMSO with bright yellow fluorescence, were successfully prepared using R/S-3-aminoquinine cyclic ammonium as the organic cation. Enantiomer R-DMSO and S-DMSO exhibit interesting self-trapped excitons (STEs) emission and fascinating circular dichroism (CD) with photoluminescence quantum yield (PLQY) approaching 100%. In addition, enantiomer R-DMSO and S-DMSO exhibited significant circularly polarized luminescence (CPL) signals, with a measured luminescence dissymmetry factor ((Formula presented.)) of approximately ±7.61 × 10⁻⁴. By immersing R/S-HCl in DMSO, it can be transformed into yellow fluorescence, its CPL signals are almost identical to R/S-DMSO. After heating at 110°C for 1 h in a vacuum oven, it is transformed back into R/S-HCl, this process achieves reversible switching of CPL signals. By utilizing this property, relevant applications of dual information encryption and anti-counterfeiting have been carried out. In addition, UV pumped circularly polarized light-emitting diode (CP-LED) devices based on enantiomer R-DMSO and S-DMSO exhibit excellent luminescence performance, with (Formula presented.) of approximately 3.68 × 10⁻³ and −3.85 × 10⁻³. This study provides a new approach for the development of stimuli-responsive functional chiral antimony-based hybrid halides.