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    韩向丽, 关静, 陈乐, 赵培, 谭伟强, 郑治坤. 气液界面法合成芘基二维聚合物薄膜[J]. 功能高分子学报, 2021, 34(5): 476-482. doi: 10.14133/j.cnki.1008-9357.20210125001
    引用本文: 韩向丽, 关静, 陈乐, 赵培, 谭伟强, 郑治坤. 气液界面法合成芘基二维聚合物薄膜[J]. 功能高分子学报, 2021, 34(5): 476-482. doi: 10.14133/j.cnki.1008-9357.20210125001
    HAN Xiangli, GUAN Jing, CHEN Le, ZHAO Pei, TAN Weiqiang, ZHENG Zhikun. Synthesis of Pyrene-Based Two-Dimensional Polymer Film by Gas-Liquid Interface Strategy[J]. Journal of Functional Polymers, 2021, 34(5): 476-482. doi: 10.14133/j.cnki.1008-9357.20210125001
    Citation: HAN Xiangli, GUAN Jing, CHEN Le, ZHAO Pei, TAN Weiqiang, ZHENG Zhikun. Synthesis of Pyrene-Based Two-Dimensional Polymer Film by Gas-Liquid Interface Strategy[J]. Journal of Functional Polymers, 2021, 34(5): 476-482. doi: 10.14133/j.cnki.1008-9357.20210125001

    气液界面法合成芘基二维聚合物薄膜

    Synthesis of Pyrene-Based Two-Dimensional Polymer Film by Gas-Liquid Interface Strategy

    • 摘要: 以1,3,6,8-四(对胺基苯基)芘为构筑单元,通过席夫碱缩合反应,利用表面活性剂单分子层辅助的界面聚合法制备了芘基二维聚合物薄膜。通过扫描电子显微镜、原子力显微镜、透射电子显微镜、X射线衍射、荧光光谱、傅里叶变换红外光谱和拉曼光谱考察了薄膜形貌、结构、结晶性和荧光强度等。结果表明:薄膜厚度约70 nm,可通过单体浓度进行调控;表面活性剂单分子层的限域作用促进了薄膜的结晶性,而分子内氢键使其具有荧光双发射效应。

       

      Abstract: Two-dimensional (2D) material, such as 2D polymer (2DP) and 2D covalent organic framework (2D-COF), has arisen as promising materials because of their unique physicochemical properties and great potential in optoelectronics, sensing, catalysis, separation, and energy storage and conversion. The preparation of 2DP films with desirable structures is promising but remains a significant challenge. Recently, vigorous efforts have been devoted to synthesizing 2DP films through different methods, such as interfacial synthesis at gas-water or liquid-liquid. Herein, a fluorescent pyrene-based 2D polyimine (2D-PI) thin film was prepared via Schiff-base condensation between 4,4',4'',4'''-(pyrene-1,3,6,8-tetrayl)tetraaniline and 2,5-dihydroxyterephthalaldehyde with trifluoromethanesulfonic acid as a catalyst at room temperature by a surfactant-monolayer-assisted interfacial synthesis (SMAIS) approach. The morphology, structure, crystallinity, and fluorescence intensity of the film were characterized by scanning electron microscopy, atomic force microscopy, transmission electron microscopy, X-ray diffraction, fluorescence spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. The results revealed that the film thickness was 70 nm, which could be controlled by changing the monomer concentration. The imine bond formation was confirmed by Fourier transform infrared spectroscopy and Raman spectroscopy. The film crystallinity depended on the diffusion rate of monomer and was significantly improved by adding trifluoromethanesulfonic acid and surfactant monolayer, which provided a confined 2D template for polymerization. In addition, the fluorescence strength of the film was enhanced by the existence of intramolecular hydrogen bonding in the framework structure. This study provided a unique idea for the preparation of 2DP films with solid luminescent properties, which may be potentially applied to detect water content in organic solvent.

       

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