Chu Bo, Zhang Haoke, Hu Lanfang, Liu Bin, Zhang Chengjian, Zhang Xinghong, Tang Ben Zhong
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China.
Angew Chem Int Ed Engl. 2022 Feb 1;61(6):e202114117. doi: 10.1002/anie.202114117. Epub 2021 Dec 16.
Preparation of non-conjugated polymers with long-wavelength emission and high quantum yield (QY) is still a huge challenge. Herein, we report the first example of linear non-conjugated polyester exhibiting yellow-green clusteroluminescence (CL) and a high QY of 38 %. We discovered that the polyester P3 with balanced flexibility and rigidity showed the longest CL wavelength and highest QY. Systematically photophysical characterization unravel the key role of ester cluster in the CL and the cluster formation via the aggregate of ester units was visualized. Moreover, P3 was demonstrated to be a highly selective, quick-responsive (ca. 1.2 min) and sensitive detector (detection limit is 0.78 μM) for irons owing to the fast disassociation of clusters by irons. This work not only gains further mechanistic insight into CL but also provides a new strategy to design high-efficiency and long-wavelength CL, meanwhile, enlightens the glorious application prospect of luminescent polyester.
制备具有长波长发射和高量子产率（QY）的非共轭聚合物仍然是一个巨大的挑战。在此，我们报道了首例呈现黄绿色聚集诱导发光（CL）且量子产率高达38%的线性非共轭聚酯。我们发现，具有平衡柔韧性和刚性的聚酯P3表现出最长的CL波长和最高的量子产率。系统的光物理表征揭示了酯簇在CL中的关键作用，并可视化了通过酯单元聚集体形成的簇。此外，由于铁能使簇快速解离，P3被证明是一种对铁具有高选择性、快速响应（约1.2分钟）且灵敏的探测器（检测限为0.78μM）。这项工作不仅进一步深入了解了CL的机理，还提供了一种设计高效长波长CL的新策略，同时，为发光聚酯的辉煌应用前景带来了启示。
