期刊
ISCIENCE
卷 23, 期 5, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.isci.2020.101064
关键词
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资金
- National Natural Science Foundation of China [21971257]
- Distinguished Professor Research Fund from Guangzhou University, China
- project of Guizhou Province Science and Technology, China (QianKeHe Foundation) [[2018]1146]
- Natural Science Foundation of Guangdong Province, China [2019A1515011358]
Fractals are a series of intricate patterns with aesthetic, mathematic, and philosophic significance. The Sierpinski triangles have been known for more than one hundred years, but only recently discrete shape-persistent low-generation (mainly ST-1) fractal supramolecules have been realized. Herein, we report a retro-assembly pathway to the nanometer-scale, supra-macromolecular second-generation Sierpinski triangle and its third-generation saturated counterpart (Pascal's triangle). These gigantic triangular assemblies are unambiguously confirmed by NMR, DOSY, ESI-MS, TWIM-MS, TEM, and AFM analyses. Notably, the dense-packed counterions of these discrete triangular architectures could further form supramolecular hydro-gels in water. This work not only provides a fundamental chemical pathway to explore various giant supramolecular constructs and further overcome the synthetic limitation of complicated molecular fractals, but also presents a new type of supramolecular hydro-gelswith potential in controlled release applications.
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