Assembling Shape-Persistent High-Order Sierpiński Triangular Fractals

iScience

卷:23

Xiaopeng Li¹  Yiming Li²  Feng Wang²  Mingzhao Chen²  Die Liu³  He Zhao³  Tingzheng Xie³  Pingshan Wang⁴  George R. Newkome⁵  Zhilong Jiang⁶  Zhe Zhang⁶  Jun Wang⁶ 

[1] Corresponding author;

[2] Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou-510006, China;

[3] Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education;

[4] Nano Materials Interface Science;

[5] Hunan Key Laboratory of Micro &

[6] Institute of Environmental Research at Greater Bay Area;

关键词: Supramolecular Technologies;    Supramolecular Materials;    Molecular Self-Assembly;    Materials Characterization Techniques;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Fractals are a series of intricate patterns with aesthetic, mathematic, and philosophic significance. The Sierpiński 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 Sierpiński 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-gels with potential in controlled release applications.

【 授权许可】

Unknown