A General Strategy for Developing Ultrasensitive “Transistor‐Like” Thermochromic Fluorescent Materials for Multilevel Information Encryption (Adv. Mater. 44/2023)

Thermochromic Fluorescent Materials In article number 2305472, Xiaobo Zhou, Yuling Qin, Li Wu, and co-workers present a comprehensive approach for the development of highly sensitive thermochromic fluorescent materials (TFMs) suitable for multilevel information encryption. They employ polarity-sensitive fluorophores with D–A–D type structures as emitters and long-chain alkanes as thermosensitive loading matrices. Thanks to this well-designed strategy, the resulting TFMs exhibit remarkable fluorescence enhancements within relatively narrow range of temperature variations.