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An inverted supramolecular amphiphile and its step-wise self-assembly into vesicular networks
Soft Matter ( IF 3.4 ) Pub Date : 2017-10-17 00:00:00 , DOI: 10.1039/c7sm01641g
Krishnananda Samanta 1, 2, 3, 4 , Elio Zellermann 1, 2, 3, 4 , Manfred Zähres 2, 4, 5 , Christian Mayer 2, 4, 5 , Carsten Schmuck 1, 2, 3, 4
Affiliation  

A host–guest interaction between a multi-cationic dendrimer 1 functionalized with 16 guanidiniocarbonyl pyrrole (GCP) groups on its surface and naphthalene diimide dicarboxylic acid (NDIDC) in a 1 : 8 ratio leads to the formation of a new type of inverted amphiphile. This amphiphile further self-assembles in a step-wise manner first into reverse micelles and then into reverse vesicles, which adhere to form an extensive 3D network several micrometers in length. Self-assembly is based on the aromatic stacking interactions of the surface-bound NDIDC. Furthermore, these aggregates only form at neutral pH but not in acidic or basic solutions in which no ion pairing between 1 and NDIDC is possible. The step-wise self-assembly process of the inverted amphiphile which follows a theoretical prediction recently proposed for hyperbranched polymers was studied and visualized in detail using atomic force microscopy (AFM) and transmission electron microscopy (TEM).

中文翻译:

倒置的超分子两亲物及其逐步自组装成囊泡网络

在其表面上被16个胍基二羰基吡咯(GCP)基团官能化的多阳离子树状聚合物1与萘二酰亚胺二羧酸(NDIDC)之间以1:8的比例进行主客体相互作用会导致形成新型的倒置两亲物。该两亲物进一步以逐步的方式自组装,首先成反胶束,然后成反泡,其粘附形成长度为几微米的广泛的3D网络。自组装基于表面结合的NDIDC的芳族堆积相互作用。此外,这些聚集体仅在中性pH下形成,而不会在酸性或碱性溶液中形成,在酸性或碱性溶液中,1对NDIDC是可能的。使用原子力显微镜(AFM)和透射电子显微镜(TEM)详细研究和可视化了反向两亲物的逐步自组装过程,该过程遵循最近对超支化聚合物提出的理论预测。
更新日期:2017-11-15
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