Self-organisation of rhombitruncated cuboctahedral hexagonal columns from an amphiphilic Janus dendrimer
Self-organisation of rhombitruncated cuboctahedral hexagonal columns from an amphiphilic Janus dendrimer
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DOI：
10.1080/00268976.2021.1902586
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发表时间：
2021-03
影响因子：
1.7
通讯作者：
N. Huang;Qi Xiao;M. Peterca;X. Zeng;V. Percec
中科院分区：
文献类型：
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作者：
N. Huang;Qi Xiao;M. Peterca;X. Zeng;V. Percec
Frank-Kasper相在硬质和软质中都有。它们已经在金属合金中被发现，随后在自组装树枝状分子、树枝状大分子和树枝状聚合物的超分子球体的自组织中被发现。最近，它们被发现存在于嵌段共聚物、脂类、表面活性剂、巨型表面活性剂、纳米颗粒、DNA颗粒中，甚至在凝聚的小分子中，如N_2、O_2和CO。在这里，我们报道了一种两亲性的Janus树枝状大分子的发现，它在水中自组装成称为树枝状小泡的囊泡，也在块状状态下自组织成螺旋柱和球体，形成柱状六角形和Frank-Kasper A15相，称为Pmn。这些自组织显示出超分子定向记忆(SOM)效应，这是由柱状到球状转变过程中的外延成核诱导的。这种SOM效应是由来自A15相的紧密接触的超分子球所介导的。在这种情况下，一种菱形八面体六角柱状排列是自组织的，据我们所知，这在生物学或合成化学中是未知的。我们相信，将两亲性的Janus树枝状大分子添加到显示Frank-Kasper相的分子和SOM效应中，将拓宽我们发现其他复杂软凝聚态的能力。图形摘要
Frank-Kasper phases are available in both hard and soft complex matter. They have been discovered in metal alloys and subsequently in self-organisations of supramolecular spheres from self-assembling dendrons, dendrimers and dendronized polymers. Recently, they were found in block copolymers, lipids, surfactants, giant surfactants, nanoparticles, DNA particles and even in condensed small molecules such as N2, O2, and CO. Here we report the discovery of an amphiphilic Janus dendrimer, that self-assembles in water into vesicles known as dendrimersomes, self-organised also in bulk state into helical columns and spheres forming columnar hexagonal and a Frank-Kasper A15 phase known as Pm n. These self-organisations display a supramolecular orientational memory (SOM) effect that is induced by an epitaxial nucleation at the transition from columns to spheres and during the reverse process. This SOM effect is mediated by the closed contact supramolecular spheres from the A15 phase. In this case a rhombitruncated cuboctahedral hexagonal columnar arrangement, that to the best of our knowledge is not known in biology or synthetic chemistry, was self-organised. We believe that the addition of amphiphilic Janus dendrimers to the classes of molecules displaying Frank-Kasper phases and the SOM effect will broaden our ability to discover additional complex soft condensed matter morphologies. GRAPHICAL ABSTRACT