Controlled Sol–Gel Transitions by Actuating Molecular Machine Based Supramolecular Polymers,Journal of the American Chemical Society

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Controlled Sol–Gel Transitions by Actuating Molecular Machine Based Supramolecular Polymers
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2017-03-13 , DOI: 10.1021/jacs.7b00983
Antoine Goujon ₁ , Giacomo Mariani ₂ , Thomas Lang ₁ , Emilie Moulin ₁ , Michel Rawiso ₁ , Eric Buhler ₂ , Nicolas Giuseppone ₁

Affiliation

The implementation of artificial molecular machines in polymer science is an important objective that challenges chemists and physicists in order to access an entirely new class of smart materials. To design such systems, the amplification of a mechanical actuation from the nanoscale up to a macroscopic response in the bulk material is a central issue. In this article we show that bistable [c2]daisy chain rotaxanes (i.e., molecular muscles) can be linked into main-chain Upy-based supramolecular polymers. We then reveal by an in depth quantitative study that the pH actuation of the mechanically active rotaxane at the nanoscale influences the physical reticulation of the polymer chains by changing the supramolecular behavior of the Upy units. This nanoactuation within the local structure of the main chain polymer results in a mechanically controlled sol-gel transition at the macroscopic level.

中文翻译：

通过驱动基于分子机器的超分子聚合物控制溶胶-凝胶转变

在聚合物科学中实施人工分子机器是挑战化学家和物理学家以获取全新一类智能材料的重要目标。为了设计这样的系统，将机械驱动从纳米级放大到大块材料中的宏观响应是一个核心问题。在本文中，我们展示了双稳态 [c2] 菊花链轮烷（即分子肌肉）可以连接到主链 Upy 型超分子聚合物中。然后，我们通过深入的定量研究揭示，纳米级机械活性轮烷的 pH 驱动通过改变 Upy 单元的超分子行为影响聚合物链的物理网状结构。

更新日期：2017-03-13

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