Redox-responsive dynamic-covalent assemblies: Stars and miktoarm stars

Bapat, Abhijeet P., Ray, Jacob G., Savin, Daniel A. and Sumerlin, Brent S. (2013) Redox-responsive dynamic-covalent assemblies: Stars and miktoarm stars. Macromolecules, 46 6: 2188-2198. doi:10.1021/ma400169m

Author Bapat, Abhijeet P.
Ray, Jacob G.
Savin, Daniel A.
Sumerlin, Brent S.
Title Redox-responsive dynamic-covalent assemblies: Stars and miktoarm stars
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
Publication date 2013-03-26
Year available 2013
Sub-type Article (original research)
DOI 10.1021/ma400169m
Open Access Status Not Open Access
Volume 46
Issue 6
Start page 2188
End page 2198
Total pages 11
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Abstract Dynamic-covalent macromolecular stars were prepared by cross-linking block copolymers containing reactive maleic anhydride units with a disulfide-containing diamine. Here we report the synthesis of disulfide-cross-linked star polymers obtained by the arm-first process. Well-defined block copolymers containing a reactive poly(styrene-alt-maleic anhydride) (P(S-alt-MAn)) segment and an inert polystyrene or poly(N-isopropylacrylamide) segment were obtained by reversible addition-fragmentation chain transfer (RAFT) polymerization. Facile ring-opening of the pendant anhydride groups in the block copolymers by a disulfide-linked diamine cross-linker led to core-cross-linked stars with redox-responsive cores. The reductive cleavage of the disulfide linkages in the cross-linked cores resulted in star dissociation into linear arms with pendant thiol groups. Oxidation of the pendant thiol units of the resulting unimers in the presence of air led to reassembly or self-healing of the stars without the need for an externally added oxidizing agent.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
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Created: Mon, 28 Sep 2015, 00:04:25 EST by Abhijeet Bapat on behalf of Aust Institute for Bioengineering & Nanotechnology