Coordination‐Driven Self‐Assembly of a Molecular Knot Comprising Sixteen Crossings,Angewandte Chemie International Edition

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Coordination‐Driven Self‐Assembly of a Molecular Knot Comprising Sixteen Crossings
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-04-17 , DOI: 10.1002/anie.201800638
Dong Hwan Kim ₁ , Nem Singh ₁ , Jihun Oh ₁ , Eun-Hee Kim ₂ , Jaehoon Jung ₁ , Hyunuk Kim ₃ , Ki-Whan Chi ₁

Affiliation

Molecular knots have become highly attractive to chemists because of their prospective properties in mimicking biomolecules and machines. Only a few examples of molecular knots from the billions tabulated by mathematicians have been realized and molecular knots with more than eight crossings have not been reported to date. We report here the coordination‐driven [8+8] self‐assembly of a higher‐generation molecular knot comprising as many as sixteen crossings. Its solid‐state X‐ray crystal structure and multinuclear 2D NMR findings confirmed its architecture and topology. The formation of this molecular knot appears to depend on the functionalities and geometries of donor and acceptor in terms of generating appropriate angles and strong π‐π interactions supported by hydrophobic effects. This study shows coordination‐driven self‐assembly offers a powerful potential means of synthesizing more and more complicated molecular knots and of understanding differences between the properties of knotted and unknotted structures.

中文翻译：

包含十六个交叉点的分子结的协调驱动自组装

由于分子结在模仿生物分子和机器方面具有前瞻性，因此已对化学家产生了极大的吸引力。仅数学家所列举的数十亿个分子结中的少数几个例子已经实现，迄今尚未报道具有超过8个交叉点的分子结。我们在这里报告了由多达16个交叉点组成的更新一代分子结的协调驱动[8 + 8]自组装。它的固态X射线晶体结构和多核2D NMR结果证实了其结构和拓扑。这种分子结的形成似乎取决于供体和受体的功能和几何形状，从而产生适当的角度和疏水效应支持的强π-π相互作用。

更新日期：2018-04-17

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