Multi‐Stimuli‐Responsive Mn‐Based Hybrid Halides for Photoluminescent Information Encryption and Anti‐Counterfeiting
Tongtong Kou, Hui Yuan, Zeyu Yan, Lingrui Wang, Liang Wang, Xinxin Han, Tong Chang, Shiguo Han, William W. Yu, Qilin WeiABSTRACT
Organic–inorganic hybrid metal halides (OIHMHs), with tunable structures and diverse luminescence, are promising stimulus‐responsive materials; however, their reliance on single stimulus responses limits their applications in high‐security information encryption and anti‐counterfeiting. Here, we report a multi‐stimuli‐responsive (C 7 H 20 N 2 )MnBr 4 and further derive its counterpart, (C 7 H 20 N 2 ) 3 Mn 4 Br 14 , via compositional regulation, enabling customizable green and red emissions. Notably, (C 7 H 20 N 2 )MnBr 4 exhibits reversible photoluminescence under both pressure and solvent stimuli, where solvent‐induced structural transformations enable reversible emission switching. These properties have been successfully applied in anti‐counterfeiting patterns and molecular‐level optical logic gates. Our results provide a general strategy for designing multi‐stimuli‐responsive luminescent materials and open new avenues for advanced optical information encryption.