Self‐Assembly of Achiral Shape Amphiphiles into Multi‐Walled Nanotubes via Helicity‐Selective Nucleation and Growth
Self‐Assembly of Achiral Shape Amphiphiles into Multi‐Walled Nanotubes via Helicity‐Selective Nucleation and Growth
复制标题
通过螺旋选择性成核和生长将非手性形状两亲物自组装成多壁纳米管
DOI：
10.1002/asia.201800005
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Wang Wei
中科院分区：
文献类型：
--
作者：
Ren Li-Jun;Wu Han;Hu Min-Biao;Wei Yu-Han;Lin Yue;Wang Wei
软纳米管通常由手性两亲物通过螺旋自组装构建。然而，如何将非手性分子自组装成纳米管仍然是一个挑战。本文报道了非手性两亲分子通过螺旋自组装构筑纳米管，并阐明了其形成机理。两亲物具有哑铃形状，并且由共价连接三个非手性部分组成：两个不同的簇和一个有机系链。不同簇之间的极性差异驱动两亲物自组装成单壁和多壁以及中间体。nanotubes.as关键中间体的分析揭示了螺旋选择性成核和生长的自组装机制。同时，直接观察带状物中的单个团簇显示出二维变形的六方晶格。因此，我们推测，这是晶格变形，产生各向异性张力沿着不同方向的带，进一步导致在螺旋带的形成朝向纳米管的两亲物。
Soft nanotubes are normally constructed from chiral amphiphiles through helical self-assembly. Yet, how to self-assemble achiral molecules into nanotubes is still a challenge. Here, we report the nanotube construction with achiral shape amphiphiles through helical self-assembly and also unravel the formation mechanisms. The amphiphiles have a dumbbell shape and are composed by covalently linking three achiral moieties together: two unlike clusters and an organic tether. The difference in polarity between the unlike clusters drives the amphiphiles to self-assemble into single- and multi-walled nanotubes.as well as intermediates. Analysis of the key intermediates unravels the self-assembly mechanism of helicity-selective nucleation and growth. Meanwhile, direct visualization of.the individual clusters in the ribbons displays a two-dimensional deformed hexagonal lattice. Thus, we speculate that it is the lattice deformation that creates anisotropic tension along different directions of the ribbon which further results in the formation of helical ribbons towards nanotubes by amphiphiles.