四苯乙烯
二聚体
支柱
荧光
超分子化学
超分子聚合物
化学
聚合物
对偶(语法数字)
光化学
高分子化学
材料科学
结晶学
聚集诱导发射
晶体结构
有机化学
哲学
物理
工程类
结构工程
量子力学
语言学
作者
Yan Wang,Ming-Zhe Lv,Nan Song,Zeng-Jie Liu,Chunyu Wang,Ying-Wei Yang
出处
期刊:Macromolecules
[American Chemical Society]
日期:2017-07-25
卷期号:50 (15): 5759-5766
被引量:75
标识
DOI:10.1021/acs.macromol.7b01010
摘要
We report a new strategy to construct a multi-stimuli-responsive fluorescent supramolecular polymer by the strong host–guest interactions between a diselenium bond-bridged pillar[5]arene dimer and an AIE-active tetraphenylethylene (TPE)-containing neutral guest bearing two imidazole terminal binding sites. The resulting supramolecular polymer shows a remarkable fluorescence emission decrease at low concentration. Significantly, the diselenium bonds introduced into the supramolecular polymer serve as redox-responsive building blocks. Upon addition of reductants, the supramolecular polymer depolymerized owing to the cleavage of the covalent diselenium bonds in the system. On the other hand, competitive guests such as adiponitrile, which bind strongly with pillar[5]arenes, could lead the disassembly of the polymer to oligomers without breaking any covalent bonds in the system. These two types of depolymerization approaches can both result in the fluorescence intensity recovery of the system to a certain exte...
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