Gao Liang, Huang Jiayue, Qu Lunjun, Chen Xiaohong, Zhu Ying, Li Chen, Tian Quanchi, Zhao Yanli, Yang Chaolong
School of Materials Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China.
School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
Nat Commun. 2023 Nov 9;14(1):7252. doi: 10.1038/s41467-023-43133-1.
Polymeric materials exhibiting room temperature phosphorescence (RTP) show a promising application potential. However, the conventional ways of preparing such materials are mainly focused on doping, which may suffer from phase separation, poor compatibility, and lack of effective methods to promote intersystem crossing and suppress the nonradiative deactivation rates. Herein, we present an intrinsically polymeric RTP system producing long-lived phosphorescence, high quantum yields and multiple colors by stepwise structural confinement to tame triplet excitons. In this strategy, the performance of the materials is improved in two aspects simultaneously: the phosphorescence lifetime of one polymer (9VA-B) increased more than 4 orders of magnitude, and the maximum phosphorescence quantum yield reached 16.04% in halogen-free polymers. Moreover, crack detection is realized by penetrating steam through the materials exposed to humid surroundings as a special quenching effect, and the information storage is carried out by employing the Morse code and the variations in lifetimes. This study provides a different strategy for constructing intrinsically polymeric RTP materials toward targeted applications.
呈现室温磷光（RTP）的聚合物材料显示出广阔的应用潜力。然而，制备此类材料的传统方法主要集中在掺杂上，这可能会出现相分离、相容性差以及缺乏促进系间窜越和抑制非辐射失活速率的有效方法等问题。在此，我们展示了一种本征型聚合物RTP体系，通过逐步的结构限制来驯服三重态激子，从而产生长寿命磷光、高量子产率和多种颜色。在这一策略中，材料的性能在两个方面同时得到改善：一种聚合物（9VA - B）的磷光寿命增加了4个多数量级，并且在无卤聚合物中最大磷光量子产率达到了16.04%。此外，通过让蒸汽穿透暴露在潮湿环境中的材料作为一种特殊的猝灭效应来实现裂纹检测，并且通过使用莫尔斯电码和寿命变化来进行信息存储。这项研究为构建用于靶向应用的本征型聚合物RTP材料提供了一种不同的策略。
