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Int. J. Mol. Sci. 2015, 16(4), 7428-7444; doi:10.3390/ijms16047428

Thermoresponsive Interplay of Water Insoluble Poly(2-alkyl-2-oxazoline)s Composition and Supramolecular Host–Guest Interactions

1
Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
2
Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, D 28759 Bremen, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Graeme Cooke and Patrice Woisel
Received: 9 March 2015 / Revised: 26 March 2015 / Accepted: 27 March 2015 / Published: 2 April 2015
(This article belongs to the Special Issue Supramolecular Polymers and Their Assemblies)
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Abstract

A series of water insoluble poly[(2-ethyl-2-oxazoline)-ran-(2-nonyl-2-oxazoline)] amphiphilic copolymers was synthesized and their solubility properties in the presence of different supramolecular host molecules were investigated. The resulting polymer-cavitand assemblies exhibited a thermoresponsive behavior that could be modulated by variation of the copolymer composition and length. Interestingly, the large number of hydrophobic nonyl units across the polymer chain induced the formation of kinetically-trapped nanoparticles in solution. These nanoparticles further agglomerate into larger aggregates at a temperature that is dependent on the polymer composition and the cavitand type and concentration. The present research expands the understanding on the supramolecular interactions between water insoluble copolymers and supramolecular host molecules. View Full-Text
Keywords: Lower Critical Solution Temperature (LCST); temperature responsive polymers; poly(2-alkyl-2-oxazoline)s; cyclodextrins; cucurbit[7]uril; supramolecular interactions; nanoparticles Lower Critical Solution Temperature (LCST); temperature responsive polymers; poly(2-alkyl-2-oxazoline)s; cyclodextrins; cucurbit[7]uril; supramolecular interactions; nanoparticles
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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R. de la Rosa, V.; Nau, W.M.; Hoogenboom, R. Thermoresponsive Interplay of Water Insoluble Poly(2-alkyl-2-oxazoline)s Composition and Supramolecular Host–Guest Interactions. Int. J. Mol. Sci. 2015, 16, 7428-7444.

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