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Issue 35, 2011
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Structural factors of amphiphilic calix[6]biscrowns affecting their vesicle–nanotube transitions in self-assembly

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Abstract

Morphological transitions of self-assemblies of organic amphiphiles responsive to environmental stimuli have drawn much attention. However, little has been investigated regarding the effects of structural factors of calixarenes on their self-assembly behavior. In this paper, we studied the self-assembly of several amphiphilic calix[6]biscrowns with emphasis on morphological transitions of the assemblies with changes in medium polarity and the key structural factors of the calix[6]biscrowns affecting the transition. It was found that when the medium polarity increased, the calix[6]biscrowns with amide linkages between the backbone and the alkyl tails performed vesicle–nanotube transitions, while the calix[6]biscrowns without such linkages showed a decrease in size of the vesicles only. Further studies, including X-ray crystallography, FT-IR and Langmuir–Blodgett film, indicated that the hydrogen bonding between the amide linkages is responsible for this vesicle-to-nanotube transition. The effect of the nature of the end groups of the tails has also been studied.

Graphical abstract: Structural factors of amphiphilic calix[6]biscrowns affecting their vesicle–nanotube transitions in self-assembly

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Article information


Submitted
01 Mar 2011
Accepted
16 Jun 2011
First published
03 Aug 2011

J. Mater. Chem., 2011,21, 13262-13267
Article type
Paper

Structural factors of amphiphilic calix[6]biscrowns affecting their vesicle–nanotube transitions in self-assembly

Q. Liang, G. Chen, B. Guan and M. Jiang, J. Mater. Chem., 2011, 21, 13262
DOI: 10.1039/C1JM10895F

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