Multidimension‐Regulated Dynamic Timing Control Over Multicolor Emission of Host–Guest Assemblies for Information Encryption and Advanced Anti‐Counterfeiting

• DOI: 10.1002/adom.202400231
• Publication Date: 2024-05-16T07:35:09Z
• Authors: Qi Zhang; Zhidong Chang; Weiqiang Han; Chaofan Wang; Guoxin Liu; Hongjuan Li; Shiguo Sun; Yongqian Xu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Dynamical control over molecular luminescence, especially in a time‐dependent manner, holds great promise for the development of smart luminescent materials anti‐counterfeiting and preventing information leakage. Herein, series self‐assembled systems are reported using pillar[5]arene (DMP[5]) spiropyran derivatives (SP‐C4‐Py). The assemblies rely on time‐encoded locking unlocking ring‐switching fluorescence resonance energy transfer (FRET) units camouflage multilevel encryption. DMP[5] with cyan solid color acts as host (EnT) donor, while photochromic SP‐C4‐Py ring‐opened closed isomers guest EnT acceptor. When irradiated, undergo luminescence change ranging from to yellow red through FRET process. molar ratio assembly affects efficiency, power irradiation source influences isomerization degree rate SP‐C4‐Py, allowing precise fluorescent transition time. combination composition external stimuli governs kinetics change, resulting difference appearance time specific pre‐designed correct authorized information. By combining these diverse assembles one label, encryption dynamic identification achieved dimensions time, ratio, light power. This feature offers security provides new possibilities blocking