Photo‐Responsive Dynamic Organic Room‐Temperature Phosphorescence Materials Based on a Functional Unit Combination Strategy

Abstract A rational molecular design strategy facilitates the development of a purely organic room‐temperature phosphorescence (RTP) material system with precisely regulated luminescence properties, which surely promotes its functional integration and intelligent application. Here, a functional unit combination strategy is proposed to design novel RTP molecules combining a folding unit with diverse luminescent cores. The different luminescent cores are mainly responsible for tunable RTP properties, while the folding unit contributes to the spin–orbit coupling (SOC) enhancement, which makes the RTP material design as workable as the building block principle. By this strategy, a series of color/lifetime‐tunable RTP materials is achieved with unique photo‐responsive RTP enhancement when subjected to UV irradiation, which expands their application scenarios in reusable privacy tags, advanced “4D” encryption, and phase separation analysis of blended polymers. This work suggests a simple and effective strategy to design purely organic RTP materials with tunable color and lifetime, and also provides new application options for photo‐responsive dynamic RTP materials.