Controlled transformation from nanorods to vesicles induced by cyclomaltoheptaoses (β-cyclodextrins)

A modified cyclomaltoheptaose (β-cyclodextrin) containing an anthraquinone moiety, mono[6-deoxy- N- n-hexylamino -( N′-1-anthraquinone)]-β-cyclodextrin ( 1), which can self-assemble into nanorods in aqueous solution, was synthesized. Interestingly, upon the addition of natural cyclodextrin, the nano...

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Bibliographic Details
Published in:Carbohydrate research 2011-02, Vol.346 (2), p.285-293
Main Authors: Sun, Tao, Zhang, Huacheng, Kong, Li, Qiao, Hongwei, Li, Yueming, Xin, Feifei, Hao, Aiyou
Format: Article
Language:English
Subjects:
Anthraquinone
anthraquinones
aqueous solutions
beta-cyclodextrin
beta-Cyclodextrins - chemistry
biocompatible materials
Copper
Cyclodextrin
Fluorescence
Hydrogen-Ion Concentration
Inclusion complex
Microscopy, Electron, Transmission
Nanorods
Nanotubes - chemistry
Responsive
spectral analysis
Vesicles
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Summary:A modified cyclomaltoheptaose (β-cyclodextrin) containing an anthraquinone moiety, mono[6-deoxy- N- n-hexylamino -( N′-1-anthraquinone)]-β-cyclodextrin ( 1), which can self-assemble into nanorods in aqueous solution, was synthesized. Interestingly, upon the addition of natural cyclodextrin, the nanorods could transform into bilayer vesicles, which were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), dynamic light scattering (DLS), and epi-fluorescence microscopy (EFM). A transformation mechanism is suggested based on the results of 1H NMR, 2D NMR ROESY, FTIR, and UV–vis spectra. The response of the vesicles to changing pH and adding Cu 2+ was also tested. Our research may pave the way to the development of new intelligent materials and biomaterials.
ISSN:0008-6215
1873-426X
DOI:10.1016/j.carres.2010.11.003