We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Programmable Polymer-Based Supramolecular Temperature Sensor with a Memory Function.
- Authors
Sambe, Léna; de La Rosa, Victor R.; Belal, Khaled; Stoffelbach, François; Lyskawa, Joel; Delattre, François; Bria, Marc; Cooke, Graeme; Hoogenboom, Richard; Woisel, Patrice
- Abstract
A new class of polymeric thermometers with a memory function is reported that is based on the supramolecular host-guest interactions of poly( N-isopropylacrylamide) (PNIPAM) with side-chain naphthalene guest moieties and the tetracationic macrocycle cyclobis(paraquat-p-phenylene) (CBPQT4+) as the host. This supramolecular thermometer exhibits a memory function for the thermal history of the solution, which arises from the large hysteresis of the thermoresponsive LCST phase transition (LCST=lower critical solution temperature). This hysteresis is based on the formation of a metastable soluble state that consists of the PNIPAM-CBPQT4+ host-guest complex. When heated above the transition temperature, the polymer collapses, and the host-guest interactions are disrupted, making the polymer more hydrophobic and less soluble in water. Aside from providing fundamental insights into the kinetic control of supramolecular assemblies, the developed thermometer with a memory function might find use in applications spanning the physical and biological sciences.
- Subjects
THERMOMETERS; NAPHTHALENE; HYSTERESIS; POLYMERS; HYDROPHOBIC interactions; CATIONIC polymers
- Publication
Angewandte Chemie International Edition, 2014, Vol 53, Issue 20, p5044
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201402108