Li Wenlang, Huang Qiuyi, Mao Zhu, He Xiaoyi, Ma Dongyu, Zhao Juan, Lam Jacky W Y, Zhang Yi, Tang Ben Zhong, Chi Zhenguo
PCFM Lab, GDHPPC Lab, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of OEMT, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China.
Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study, The Hong Kong University of Science and Technology, Kowloon, 999077, Hong Kong, China.
Nat Commun. 2022 Dec 2;13(1):7423. doi: 10.1038/s41467-022-35155-y.
Developing dynamic organic ultralong room-temperature phosphorescent (URTP) materials is of practical importance in various applications but remains a challenge due to the difficulty in manipulating aggregate structures. Herein, we report a dish-like molecular architecture via a bottom-up way, featuring guest-responsive dynamic URTP. Through controlling local fragment motions in the molecular architecture, fascinating dynamic URTP performances can be achieved in response to reversible accommodation of various guests, including solvents, alkyl bromides and even carbon dioxide. Large-scale regulations of phosphorescence lifetime (100-fold) and intensity (10-fold) can be realized, presenting a maximum phosphorescence efficiency and lifetime of 78.8% and 483.1 ms, respectively. Moreover, such a dish-like molecular architecture is employed for temperature-dependent multiple information encryption and visual identification of linear alkyl bromides. This work can not only deepen our understanding to construct multifunctional organic aggregates, but also facilitate the design of high-performance dynamic URTP materials and enrich their practical applications.
开发动态有机超长室温磷光（URTP）材料在各种应用中具有实际重要性，但由于难以控制聚集结构，仍然是一个挑战。在此，我们通过自下而上的方法报告了一种盘状分子结构，具有客体响应性动态URTP。通过控制分子结构中的局部片段运动，可以响应各种客体（包括溶剂、烷基溴甚至二氧化碳）的可逆容纳而实现迷人的动态URTP性能。可以实现磷光寿命（100倍）和强度（10倍）的大规模调节，分别呈现出78.8%和483.1 ms的最大磷光效率和寿命。此外，这种盘状分子结构用于温度依赖性多重信息加密和线性烷基溴的视觉识别。这项工作不仅可以加深我们对构建多功能有机聚集体的理解，还可以促进高性能动态URTP材料的设计并丰富其实际应用。
