Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
Molecules. 2022 Dec 14;27(24):8876. doi: 10.3390/molecules27248876.
Dynamic emissive materials in aqueous media have received much attention owing to their ease of preparation, tunable luminescence and environmental friendliness. However, hydrophobic fluorophores usually suffer from aggregation-caused quenching in water. In this work, we constructed an artificial light-harvesting system by using a non-covalent aggregation-induced emission dimer as antenna and energy donor. The dimer is quadruple hydrogen bonded from a ureidopyrimidinone derivative () containing a tetraphenylethylene group. The dispersed nano-assemblies based on the dimer in aqueous media were fabricated with the help of surfactant. By loading a hydrophobic acceptor molecule into the nano-assemblies, man-made light-harvesting nanoparticles were fabricated, showing considerable energy transfer efficiency and a relatively high antenna effect. Additionally, the fluorescence color of the system can be gradually tuned by varying the content of the acceptors. This study provides a general way for the construction of an aqueous light-harvesting system based on a supramolecular dimer, which is important for potential application in luminescent materials.
由于其制备简单、发光可调谐以及环境友好等特点，水相中的动态发光材料受到了广泛关注。然而，疏水性荧光团通常在水中会由于聚集而导致荧光猝灭。在这项工作中，我们构建了一种人工光捕获系统，该系统使用非共价聚集诱导发射二聚体作为天线和能量供体。二聚体由含有四苯乙烯基团的脲嘧啶嘧啶酮衍生物（）通过四重氢键形成。在表面活性剂的帮助下，在水介质中制备了基于二聚体的分散纳米组装体。通过将疏水性受体分子（）载入纳米组装体中，制备了人造光捕获纳米粒子，表现出相当高的能量转移效率和相对较高的天线效应。此外，通过改变受体的含量，可以逐渐调节该体系的荧光颜色。这项研究为基于超分子二聚体构建水相光捕获系统提供了一种通用方法，这对于潜在的发光材料应用具有重要意义。
