Recognition-Mediated Hydrogel Swelling Controlled by Interaction with a Negative Thermoresponsive LCST Polymer

被引：56

作者：

Belal, Khaled ^{[1
]}

Stoffelbach, Francois ^{[2
]}

Lyskawa, Joel ^{[1
]}

Fumagalli, Matthieu ^{[3
,4
]}

Hourdet, Dominique ^{[3
,4
]}

Marcellan, Alba ^{[3
,4
]}

De Smet, Lieselot ^{[1
,5
]}

de la Rosa, Victor R. ^{[5
]}

Cooke, Graeme ^{[6
]}

Hoogenboom, Richard ^{[5
]}

Woisel, Patrice ^{[1
]}

机构：

[1] UMR CNRS 8207 ENSCL, Equipe Ingn Syst Polymeres ISP, Unite Mat & Transformat, F-59655 Villeneuve Oascq, France

[2] UPMC Univ Paris 06, Sorbonne Univ, CNRS, Inst Parisien Chim Mol,UMR 8232,Equipe Chim Polym, F-75252 Paris 05, France

[3] ESPCI ParisTech PSL Res Univ, 10 Rue Vauquelin, F-75005 Paris, France

[4] UPMC Univ Paris 06 Sorbonne Univ, Sci & Ingn Mat Molle CNRS UMR 7615, 10 Rue Vauquelin, F-75005 Paris, France

[5] Univ Ghent, Dept Organ & Macromol Chem, Supramol Chem Grp, Krijgslaan 281 S4 Bis, B-9000 Ghent, Belgium

[6] Univ Glasgow, Sch Chem, WestCHEM, Glasgow G12 8QQ, Lanark, Scotland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 45期

基金：

英国工程与自然科学研究理事会;

关键词：

host-guest compounds; hydrogels; supramolecular chemistry; swelling; thermoresponsive polymers; CRITICAL SOLUTION TEMPERATURE; RESPONSIVE HYDROGELS; FUNCTIONALIZED POLY(N-ISOPROPYLACRYLAMIDE); AQUEOUS-SOLUTION; SMART MATERIALS; GELS; COPOLYMERS; WATER;

D O I：

10.1002/anie.201605630

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Most polymeric thermoresponsive hydrogels contract upon heating beyond the lower critical solution temperature (LCST) of the polymers used. Herein, we report a supramolecular hydrogel system that shows the opposite temperature dependence. When the non-thermosesponsive hydrogel NaphtGel, containing dialkoxynaphthalene guest molecules, becomes complexed with the tetra cationic macrocyclic host CBPQT(4+), swelling occurred as a result of host-guest complex formation leading to charge repulsion between the host units, as well as an osmotic contribution of chloride counter-ions embedded in the network. The immersion of NaphtGel in a solution of poly(N-isopropylacrylamide) with tetrathiafulvalene (TTF) end groups complexed with CBPQT(4+) induced positive thermoresponsive behaviour. The LCST-induced dethreading of the polymer-based pseudorotaxane upon heating led to transfer of the CBPQT(4+) host and a concomitant swelling of NaphtGel. Subsequent cooling led to reformation of the TTF-based host-guest complexes in solution and contraction of the hydrogel.

引用

页码：13974 / 13978

页数：5

共 41 条

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