An inverted supramolecular amphiphile and its step-wise self-assembly into vesicular networks

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-ass...

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Bibliographic Details
Published in:Soft matter 2017, Vol.13 (44), p.8108-8112
Main Authors: Samanta, Krishnananda, Zellermann, Elio, Zähres, Manfred, Mayer, Christian, Schmuck, Carsten
Format: Article
Language:English
Subjects:
Atomic force microscopy
Diimide
Electron microscopy
Micrometers
Microscopes
Microscopy
Naphthalene
Polymers
Reverse micelles
Self-assembly
Transmission electron microscopy
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Summary: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).
ISSN:1744-683X
1744-6848
DOI:10.1039/c7sm01641g