Xu Linxian, Wang Zaiyu, Wang Rongrong, Wang Lingyun, He Xuewen, Jiang Huanfeng, Tang Hao, Cao Derong, Tang Ben Zhong
State Key Laboratory of Luminescent Materials and Devices, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.
Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong.
Angew Chem Int Ed Engl. 2020 Jun 15;59(25):9908-9913. doi: 10.1002/anie.201907678. Epub 2019 Sep 3.
Superior artificial light-harvesting systems (ALHSs) require exceptional capacity in harvesting light and transferring energy. In this work, we report a novel strategy to build ALHSs with an unprecedented antenna effect (35.9 in solution and 90.4 in solid film). The ALHSs made use of a conjugated polymeric supramolecular network (CPSN), a crosslinked network obtained from the self-assembly of a pillar[5]arene-based conjugated polymeric host (CPH) and conjugated ditopic guests (Gs). The excellent performance of the CPSN could be attributed to the following factors: 1) The "molecular wire effect" of the conjugated polymeric structure, 2) aggregation-induced enhanced emission (AEE) moieties in the CPH backbone, and 3) high capacity of donor-acceptor energy transfer, and 4) crosslinked structures triggered by the host-guest binding between Gs and CPH. Moreover, the emission of the CPSN could be tuned by using different Gs or varying the host/guest ratio, thus reaching a 96 % sRGB area.
优异的人工光捕获系统（ALHSs）需要具备卓越的光捕获和能量转移能力。在这项工作中，我们报道了一种构建具有前所未有的天线效应（溶液中为35.9，固体薄膜中为90.4）的ALHSs的新策略。这些ALHSs利用了共轭聚合物超分子网络（CPSN），它是由基于柱[5]芳烃的共轭聚合物主体（CPH）和共轭双位点客体（Gs）自组装得到的交联网络。CPSN的优异性能可归因于以下因素：1）共轭聚合物结构的“分子线效应”；2）CPH主链中的聚集诱导增强发射（AEE）部分；3）供体-受体能量转移的高能力；4）Gs与CPH之间的主客体结合引发的交联结构。此外，通过使用不同的Gs或改变主客体比例，可以调节CPSN的发射，从而达到96%的sRGB色域。
