Li Hui, Li Xiaoye, Su Haoran, Zhang Shuman, Tan Cheng, Chen Cheng, Zhang Xin, Huang Jiani, Gu Jie, Li Huanhuan, Xie Gaozhan, Dong Heng, Chen Runfeng, Tao Ye
State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Research Institute of Stomatology, Nanjing University 30 Zhongyang Road Nanjing Jiangsu 210008 China
Chem Sci. 2024 Aug 23;15(36):14880-7. doi: 10.1039/d4sc02839b.
Developing exciplex-based organic long-persistent luminescence (OLPL) materials with high stability is very important but remains a formidable challenge in a single-component system. Here, we report a facile strategy to achieve highly stable OLPL in an amorphous exciplex copolymer system through-space charge transfer (TSCT). The copolymer composed of electron donor and acceptor units can not only exhibit effective TSCT for intra/intermolecular exciplex emission but also construct a rigid environment to isolate oxygen and suppress non-radiative decay, thereby enabling stable exciplex-based OLPL emission with color-tunable feature for more than 100 h under ambient conditions. These single-component OLPL copolymers demonstrate robust antibacterial activity against under visible light irradiation. These results provide a solid example to exploit highly stable exciplex-based OLPL in polymers, shedding light on how the TSCT mechanism may potentially contribute to OLPL in a single-component molecular system and broadening the scope of OLPL applications.
开发具有高稳定性的基于激基复合物的有机长余辉发光（OLPL）材料非常重要，但在单一组分体系中仍然是一项艰巨的挑战。在此，我们报告了一种简便的策略，通过空间电荷转移（TSCT）在非晶态激基复合物共聚物体系中实现高度稳定的OLPL。由电子供体和受体单元组成的共聚物不仅可以表现出有效的TSCT用于分子内/分子间激基复合物发射，还可以构建一个刚性环境来隔绝氧气并抑制非辐射衰减，从而在环境条件下实现基于激基复合物的稳定OLPL发射，具有超过100小时的颜色可调特性。这些单一组分的OLPL共聚物在可见光照射下对[具体对象未给出]表现出强大的抗菌活性。这些结果为在聚合物中开发高度稳定的基于激基复合物的OLPL提供了一个坚实的例子，揭示了TSCT机制如何可能在单一组分分子体系中对OLPL做出潜在贡献，并拓宽了OLPL的应用范围。
