Reversible Assembly of Microgels by Metallo-Supramolecular Chemistry |
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Authors: | Dr. Julien Es Sayed Dr. Cédric Lorthioir Dr. Philippe Banet Prof. Patrick Perrin Dr. Nicolas Sanson |
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Affiliation: | 1. Soft Matter Sciences and Engineering, ESPCI, PSL University, Sorbonne Université, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France;2. Laboratoire de Chimie de la Matière Condensée de Paris, Sorbonne Université, CNRS, Collège de France, 4 Place Jussieu, 75005 Paris Cedex 05, France;3. Laboratoire de Physicochimie des Polymères et des Interfaces, CY Cergy Paris Université, 5 Mail Gay Lussac, Site de Neuville, 95000 Cergy Pontoise Cedex, France |
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Abstract: | The combination of supramolecular chemistry and soft colloids as microgels represents an ambitious way to develop multi-versatile colloidal assemblies. Hereafter, terpyridine-functionalized poly(N-isopropylacrylamide) (PNiPAM) microgel building blocks are shown to undergo an assemble–freeze–disassemble process. The microgel assemblies, which are controlled by monitoring the attractive and repulsive potentials between the soft colloidal particles, are then frozen by forming inter-particle metal–terpyridine bis-complexes upon addition of the metallic cation (such as FeII, CoII). By oxidation of the metal–terpyridine bis-complex links, the aggregates open up, which is due to the complex dissociation releasing the connected particles in the form of single microgels. We extended our work to the development of 1D filaments and 2D membranes materials made of soft particles connected via supramolecular chemistry. |
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Keywords: | Kolloidassemblierung Mikrogele Responsive Materialien Supramolekulare Chemie Terpyridinkomplex |
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