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Reversible Assembly of Microgels by Metallo‐Supramolecular Chemistry
Author(s) -
Es Sayed Julien,
Lorthioir Cédric,
Banet Philippe,
Perrin Patrick,
Sanson Nicolas
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201915737
Subject(s) - terpyridine , supramolecular chemistry , colloid , chemistry , nanotechnology , self assembly , dissociation (chemistry) , metal , soft materials , membrane , colloidal particle , chemical engineering , polymer chemistry , materials science , molecule , organic chemistry , biochemistry , engineering
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 Fe II , Co II ). 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.