Hierarchical Self-Assembly of Supramolecular Muscle-Like Fibers
Hierarchical Self-Assembly of Supramolecular Muscle-Like Fibers
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DOI：
10.1002/anie.201509813
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发表时间：
2016-01-11
影响因子：
16.6
通讯作者：
Giuseppone, Nicolas
中科院分区：
文献类型：
--
作者：
Goujon, Antoine;Du, Guangyan;Giuseppone, Nicolas
以两个2，6-二乙酰氨基吡啶单元为端基的酸碱可切换的[c2]菊花链轮烷与双(尿嘧啶)接头自组装。互补的氢键识别模式，加上侧向的范德华聚集体，导致了一维超分子聚合物的层次化形成，这些聚合物与肌样纤维束相关联。微观和散射技术表明，这些聚合束的介观结构取决于轮烷在各个聚合物链中表现出的伸展或收缩状态。由于超分子键和机械键的结合，观察到的局部动力学跨越了几个长度尺度。这项工作说明了通过单个分子机器的集成驱动来改变大聚合物体系的分级介观结构的可能性。
An acid-base switchable [c2] daisy chain rotaxane terminated with two 2,6-diacetylamino pyridine units has been self-assembled with a bis(uracil) linker. The complementary hydrogen-bond recognition patterns, together with lateral van der Waals aggregations, result in the hierarchical formation of unidimensional supramolecular polymers associated in bundles of muscle-like fibers. Microscopic and scattering techniques reveal that the mesoscopic structure of these bundles depends on the extended or contracted states that the rotaxanes show within individual polymer chains. The observed local dynamics span over several length scales because of a combination of supramolecular and mechanical bonds. This work illustrates the possibility to modify the hierarchical mesoscopic structuring of large polymeric systems by the integrated actuation of individual molecular machines.