Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100049
Keywords
beta-cyclodextrin; ferrocene; host-guest interaction; polyelectrolyte; redox-responsiveness; ROMP; supramolecular hydrogels
Categories
Funding
- National Natural Science Foundation of China [21978180]
- Science & Technology Department of Sichuan Province [2018HH0038]
- Centre National de la Recherche Scientifique (CNRS)
- Universities of Bordeaux and Rennes 1
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A new side-chain ferrocene (Fc)-containing polyelectrolyte hydrogel has been synthesized, showing improved swelling properties through controlled polymerization and host-guest interactions. The redox-responsive hydrogels have potential applications in controlled drug delivery and actuators.
A new side-chain ferrocene (Fc)-containing polyelectrolyte has been synthesized by controlled ring-opening metathesis polymerization of a water-soluble Fc-containing norbornene-based quaternary ammonium salt, as well as the corresponding covalently cross-linked polyelectrolyte hydrogel. In order to provide Fc-containing supramolecular polyelectrolyte hydrogels whose swelling property is largely improved by host-guest interaction, a covalently cross-linked polyelectrolyte hydrogel is soaked into the beta-CD aqueous solution to form beta-CD@Fc supramolecular polyelectrolyte hydrogel, or alternatively the quaternary ammonium salt supramolecular monomer is first formed, then copolymerized with a crosslinking agent to fabricate the supramolecular hydrogel with better water absorption ability. All the Fc-containing hydrogels exhibited good redox-responsiveness with swelling-shrinking behaviors by chemically reversibly adjusting the disassembly/assembly of beta-CD@Fc inclusion complexes. This is the first example of side-chain Fc-containing polycationic supramolecular hydrogels possessing swelling-shrinking properties based on the splitting/combining of beta-CD and Fc units, and potential applications are expected as controlled drug delivery and actuators.
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