Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States.
Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States.
J Am Chem Soc. 2019 Aug 21;141(33):12998-13002. doi: 10.1021/jacs.9b06445. Epub 2019 Aug 2.
Herein we report a hydrogen-bonded three-dimensional porous supramolecular polyknot assembled from a rigid trigonal prismatic triptycene building block with six extended peripheral aryl-carboxyl groups. Within this superstructure, three arrays of undulated 2D rhombic subnets, which display an inclined polycatenation, are interconnected to give an unprecedented uninodal six-connected net with a point symbol of (3.4.6). Such an entanglement results in a trefoil knot motif, which, as the basic repeating unit, is fused and interlocked with itself three-dimensionally to afford a supramolecular polyknot. This example highlights the ability of supramolecular systems to form topologically complex architectures using geometrically simple building blocks.
在此，我们报告了一种由刚性三角棱柱三并苯构筑块与六个扩展的外围芳基羧酸基团组装而成的氢键三维多孔超分子多纽结。在这个超结构中，三个排列的扭曲的二维菱形子网相互连接，呈现出倾斜的多锁链排列，形成了一个前所未有的具有（3.4.6）点符号的单节点六连接网络。这种缠结导致三叶结图案，作为基本重复单元，三维融合和互锁，形成超分子多纽结。这个例子突出了使用几何上简单的构筑块形成拓扑复杂结构的超分子体系的能力。
