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Fabrication of nanofibres with azopyridine compounds in various acids and solvents

机译:在各种酸和溶剂中用氮吡啶化合物的纳米纤维制备

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摘要

Supramolecular self-organization behaviours of one azopyridine compound were systematically studied in a series of inorganic acids and various organic solvents. Different morphologies of the resultant low-molecular-weight compounds were obtained in diverse environments. The acid dissociation constant has a critical effect on the self-assembly since the nanofibres were successfully obtained only when the acid dissociation constant is between 2.12 and -3.00. Besides, the organic solvent also influenced the process of fibre formation. In acetone, the self-organized fibrous material resulted in the occurrence of gelation. The driving force for nanofibre formation may be due to the existence of several non-covalent interactions, such as hydrogen bonds, ionic bonds and the aggregation of chromophores. Then, a possible schematic illustration for the fabrication of supramolecularly self-assembled fibres was proposed based on TEM and XRD measurements. That is, visible micron-fibres were made from nanofibres through stacking interaction forces of azopyridine chromophores.
机译:在一系列无机酸和各种有机溶剂中系统地研究了一种唑吡啶化合物的超分子自组织行为。在不同的环境中获得所得低分子量化合物的不同形态。酸解离常数对自组装具有临界作用,因为仅在酸解离常数在2.12和-3.00之间成功获得纳米纤维。此外,有机溶剂还影响了纤维形成的过程。在丙酮中,自组织纤维材料导致凝胶化的发生。纳米纤维形成的驱动力可能是由于存在几种非共价相互作用,例如氢键,离子键和发色团的聚集。然后,提出了基于TEM和XRD测量的用于制造Sumrametoolulary自组装纤维的可能示意图。即,通过堆叠氮杂物发色团的相互作用力来由纳米纤维制成可见的微米纤维。

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  • 来源
    《RSC Advances》 |2015年第39期|共7页
  • 作者单位

    Univ Sci &

    Technol Beijing Dept Mat Phys &

    Chem Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Dept Mat Phys &

    Chem Beijing 100083 Peoples R China;

    Peking Univ Coll Engn Dept Mat Sci &

    Engn Beijing 100871 Peoples R China;

    Peking Univ Coll Engn Dept Mat Sci &

    Engn Beijing 100871 Peoples R China;

    Univ Sci &

    Technol Beijing Dept Mat Phys &

    Chem Beijing 100083 Peoples R China;

    Univ Calif Los Angeles Dept Chem &

    Biomol Engn Los Angeles CA 90095 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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