从一维聚合物到二维聚合物：水中单价单单体厚的二维共轭聚合物的制备,ACS Nano

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从一维聚合物到二维聚合物：水中单价单单体厚的二维共轭聚合物的制备
ACS Nano ( IF 15.8 ) Pub Date : 2017-06-24 00:00:00 , DOI: 10.1021/acsnano.7b03109
Na Zhang , Taisheng Wang , Xing Wu , Chen Jiang , Taiming Zhang , Bangkun Jin , Hengxing Ji , Wei Bai ₁ , Ruke Bai

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最近，对二维（2D）有机聚合物的研究取得了长足的进步，共轭2D聚合物已经在学术和实际应用中发挥了动态作用。但是，在溶液中，尤其是在水性介质中获得单层2D聚合物的便捷，非界面方法仍然具有挑战性。本文中，我们提出了一种简便，高效且通用的“ 1D到2D”策略，无需任何帮助即可在水中制备独立的单单体厚共轭2D聚合物。通过利用刚性两亲1D聚合物的并排自组装并在水中进行拓扑化学光聚合，可以实现2D结构。单层聚合物片材的自发形成是由疏水相互作用，π–π堆积相互作用，和静电排斥。超分子片和共价片均通过光谱分析和电子显微镜技术确认。此外，与超分子2D聚合物相比，共价2D聚合物片材不仅显示出更高的机械强度，而且还显示出更高的电导率，这可以归因于共价2D聚合物片材内的共轭网络。

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From 1D Polymers to 2D Polymers: Preparation of Free-Standing Single-Monomer-Thick Two-Dimensional Conjugated Polymers in Water

Recently, investigation on two-dimensional (2D) organic polymers has made great progress, and conjugated 2D polymers already play a dynamic role in both academic and practical applications. However, a convenient, noninterfacial approach to obtain single-layer 2D polymers in solution, especially in aqueous media, remains challenging. Herein, we present a facile, highly efficient, and versatile “1D to 2D” strategy for preparation of free-standing single-monomer-thick conjugated 2D polymers in water without any aid. The 2D structure was achieved by taking advantage of the side-by-side self-assembly of a rigid amphiphilic 1D polymer and following topochemical photopolymerization in water. The spontaneous formation of single-layer polymer sheets was driven by synergetic association of the hydrophobic interactions, π–π stacking interactions, and electrostatic repulsion. Both the supramolecular sheets and the covalent sheets were confirmed by spectroscopic analyses and electron microscope techniques. Moreover, in comparison of the supramolecular 2D polymer, the covalent 2D polymer sheets exhibited not only higher mechanical strength but also higher conductivity, which can be ascribed to the conjugated network within the covalent 2D polymer sheets.

更新日期：2017-06-28

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