Li Zhizheng, Yue Qian, He Ye, Zhang Huacheng
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China.
ACS Appl Mater Interfaces. 2024 May 15;16(19):25415-25421. doi: 10.1021/acsami.4c04921. Epub 2024 May 2.
It is of practical significance to develop polymer-based room-temperature phosphorescence (RTP) materials with ultralong lifetime and multicolor afterglow. Herein, the benzocarbazole derivatives were selected and combined with a poly(vinyl alcohol) (PVA) matrix by a coassembly strategy. Owing to the hydrogen-bonding interactions between benzocarbazole derivatives and the PVA matrix, the nonradiative transition and the quenching of triplet excitons are effectively inhibited. Therefore, the maximum phosphorescence emission lifetime of 2202.17 ms from and the maximum phosphorescence quantum efficiency of 34.97% from were obtained, respectively. In addition, commercially available dye molecules were selected to construct phosphorescent resonance energy transfer (PRET) systems for energy acceptors, enabling full-color afterglow emission in blue, green, yellow, red, and even white. Based on the characteristics of prepared RTP materials, multifunctional applications to flexibility, information encryption, and erasable drawing were deeply explored.
开发具有超长寿命和多色余辉的聚合物基室温磷光（RTP）材料具有实际意义。在此，通过共组装策略选择苯并咔唑衍生物并将其与聚乙烯醇（PVA）基质结合。由于苯并咔唑衍生物与PVA基质之间的氢键相互作用，有效地抑制了非辐射跃迁和三重态激子的猝灭。因此，分别获得了来自[具体物质1]的2202.17 ms的最大磷光发射寿命和来自[具体物质2]的34.97%的最大磷光量子效率。此外，选择市售染料分子构建用于能量受体的磷光共振能量转移（PRET）系统，实现蓝色、绿色、黄色、红色甚至白色的全色余辉发射。基于所制备的RTP材料的特性，深入探索了其在柔韧性、信息加密和可擦除绘图方面的多功能应用。
