Harnessing Reversible 0D–1D Transformation in Chiral Mn(II) Halides for Smart Circularly Polarized Luminescence Switching and Multi‐Level Encryption

作者：Jinyang Li, Kele Liao, Qinghong Zeng, Xun Zhang, Jiajia Zhang, Fanglong Yuan · 发表于：Angewandte Chemie International Edition · 年份：2026 · DOI：10.1002/anie.202525831 · 被引用次数：7 · 研究领域：Synthesis and Properties of Aromatic Compounds、Magnetism in coordination complexes、Metal-Organic Frameworks: Synthesis and Applications

Circularly polarized luminescence (CPL) active materials with dynamically tunable properties are highly desirable for next-generation photonics and encryption technologies, yet achieving this through predictable solid-state structural transformations remains a formidable challenge. Herein, we demonstrate a novel dimensionality-engineering strategy to realize stimuli-responsive CPL in chiral hybrid Mn(II) halides. Employing a single chiral cation, R/S-3-methylmorpholine, we selectively synthesized two distinct phases: a red-emissive 1D chain structure with octahedral Mn(II) centers and a green-emissive 0D structure with tetrahedral coordination. Remarkably, the 0D phase undergoes a rapid and reversible ethanol-assisted thermal transformation into the 1D phase, accompanied by a striking CPL color switch from green to red. This unique behavior stems from a stimulus-induced recoordination of Mn-Cl units and reorganization of the hydrogen-bonding network. Capitalizing on this reversible response and intrinsic chirality, we engineered a sophisticated multilevel photonic encryption platform, encompassing binary dot-matrix coding, dual-channel (photoluminescence/CPL) Morse code, and CPL-based ASCII decryption. This work establishes structural dimensionality control as a powerful paradigm for creating intelligent, CPL-active materials, opening new avenues for high-security optical information technologies.