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Light-controlled switching of the self-assembly of ill-defined amphiphilic SP-PAMAM

机译：轻控切换的无义的两亲的SP-PAMAM自组装

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摘要

Light-responsive amphiphilic spiropyrans-decorated polyamidoamine (SP-P3) with ill-defined structure was prepared by using 3.0G-PAMAM as the scaffold and introducing the spiropyrans to the periphery of it randomly. Under visible light illumination, the ill-defined structure SP-P3 could form an adaptive amphiphilic macromolecule by rearranging dynamically the peripheral amino and SP groups on the surface of PAMAM. The resultant adaptive amphiphilic SP-P3 could hierarchically self-assemble into uniform macrorods about 800-1100 nm in width and 50-80 mu m in length. When irradiated with UV light (365 nm), hydrophobic SP-P3 would isomerise into hydrophilic MC-P3, and induced the disassembly of rod-like aggregates. Irradiation with visible light transformed the MC-P3 back to the SP-P3 and then it could re-self-assemble into the rod-like aggregates. These results demonstrated that these macrorods could reversibly disassemble and re-self-assemble in aqueous solution under alternative UV and visible light irradiation. Our experiments not only provide a novel strategy for preparing responsive dynamic materials, but also support the concept that ill-defined amphiphilic macromolecules could also self-assemble to form well-shaped supramolecular structures.
机译：通过使用3.0g-Pamam作为支架制备具有明确的结构的轻响应式两亲螺旋吡喃吡喃（SP-P3），并随机将螺吡喃引入其周边。在可见光照射下，通过动态地重新排列的外周氨基和SP组可以在PAMAM的表面上重新排列，所以定义的结构SP-P3可以形成自适应两亲子大分子。所得的自适应两亲SP-P3可以分层地自组装成约800-1100nm的宽度和50-80μm的均匀大计。当用UV光（365nm）照射时，疏水的SP-P3将异构成亲水性MC-P3，并诱导抗杆状聚集体的拆卸。用可见光照射将MC-P3转换回SP-P3，然后可以重新自组装成棒状聚集体。这些结果表明，这些巨孔可以在替代的UV和可见光照射下可逆地拆卸和再自动组装在水溶液中。我们的实验不仅提供了一种新颖的制备响应性动态材料的策略，而且还支持隐定的两亲大分子的概念也可以自组装以形成良好形状的超分子结构。

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  • 来源
    《RSC Advances》 |2015年第123期|共6页
  • 作者

    Fu Shuang; Sun Hongcheng; Li Jiaxi; Bai Yushi; Luo Quan; Dong Zeyuan; Xu Jiayun; Liu Junqiu;

  • 作者单位

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem State Key Lab Supramol Struct &

    Mat Changchun 130012 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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