Fu Shuang, Pang Aimin, Guo Xiang, He Youling, Song Shanliang, Ge Jinyin, Li Jiangao, Li Wei, Xiong Yu, Wang Lei, Wang Dong, Tang Ben Zhong
Center for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
Science and Technology on Aerospace Chemical Power Laboratory, Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, China.
ACS Nano. 2022 Aug 23;16(8):12720-12726. doi: 10.1021/acsnano.2c04480. Epub 2022 Aug 12.
Supramolecular toroids have attracted continuous attention because of their fascinating topological structure and important role in biological systems. However, it still remains a great challenge to construct supramolecular functional toroids and clarify the formation mechanism. Herein, we develop a strategy to prepare supramolecular helical fluorescent nanotoroids by cooperative self-assembly of an amino acid and a dendritic amphiphile (AIE-den-1) with aggregation-induced emission characteristics. Mechanistic investigation on the basis of fluorescence and circular dichroism analyses suggests that the toroid formation can be driven by the interactions of AIE-den-1 with amino acid and goes through a topological morphology transformation from nanofibers to left-handed nanotoroids by means of a twist-fused-loop process.
超分子环面因其迷人的拓扑结构和在生物系统中的重要作用而一直备受关注。然而，构建超分子功能环面并阐明其形成机制仍然是一个巨大的挑战。在此，我们开发了一种策略，通过具有聚集诱导发光特性的氨基酸和树枝状两亲分子（AIE-den-1）的协同自组装来制备超分子螺旋荧光纳米环面。基于荧光和圆二色性分析的机理研究表明，环面的形成可以由AIE-den-1与氨基酸的相互作用驱动，并通过扭曲融合环过程经历从纳米纤维到左手纳米环面的拓扑形态转变。
