Dynamic Covalent Hydrazone Supramolecular Polymers toward Multiresponsive Self-Assembled Nanowire System,Macromolecules

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Dynamic Covalent Hydrazone Supramolecular Polymers toward Multiresponsive Self-Assembled Nanowire System
Macromolecules ( IF 5.1 ) Pub Date : 2018-10-11 00:00:00 , DOI: 10.1021/acs.macromol.8b01909
Kyung-su Kim ₁ , Hye Jin Cho ₁ , Jookyeong Lee ₁ , Seonggyun Ha ₁ , Sun Gu Song ₁ , Seunghun Kim ₁ , Wan Soo Yun ₁ , Seong Kyu Kim ₁ , Joonsuk Huh ₁ , Changsik Song ₁

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Stimuli-responsive polymeric systems are of considerable interest due to their potential applications in environment-adaptive technologies such as smart surfaces. Traditionally, such systems can be constructed either by dynamic noncovalent (supramolecular) or dynamic covalent chemistry, but the use of both chemistries in one system may offer unique opportunities for structural diversity and various controllability. Herein, we report that hydrazone–pyridinum conjugates, which can be dynamically exchanged by transimination, assemble to form one-dimensional nanowires due to direct intermolecular interactions (without metal-ion coordination). The self-assembly process can be controlled not only by dynamic covalent chemistry but also by pH adjustment. The hydrazone–pyridinum conjugates are transformed to merocyanine-type dyes of distinctive negative solvatochromism via deprotonation, which also affects their self-assembly. Such a dual control of the dynamic molecular assembly will provide unique way to develop diverse smart nanomaterials with multistimuli-responsiveness.

中文翻译：

动态共价Hy超分子聚合物对多响应自组装纳米线系统的影响。

响应性聚合物系统由于其在诸如智能表面之类的环境适应技术中的潜在应用而备受关注。传统上，可以通过动态非共价（超分子）化学或动态共价化学方法构建此类系统，但是在一个系统中同时使用两种化学方法可能会为结构多样性和各种可控性提供独特的机会。在本文中，我们报道了-吡啶共轭物，可以通过转位作用进行动态交换，由于直接的分子间相互作用而组装成一维纳米线。（无金属离子配位）。自组装过程不仅可以通过动态共价化学来控制，而且可以通过调节pH值来控制。de-吡啶共轭物通过去质子化反应转变为具有独特负溶剂变色性的花菁型染料，这也影响了它们的自组装。动态分子组装的这种双重控制将提供独特的方式来开发具有多重刺激响应性的各种智能纳米材料。

更新日期：2018-10-11

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