Redox-induced polymerisation/depolymerisation of metallo-supramolecular polymers

Adriane K. Miller, Zheng Li, Kiril A. Streletzky, Alexander M. Jamieson, Stuart J. Rowan

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28 Citations (Scopus)

Abstract

Redox-responsive metallo-supramolecular polymers (MSPs), consisting of a ditopic ligand end-capped poly(tetrahydrofuran) (pTHF) macromonomer self-assembled with copper ions, have been developed where the degree of polymerization of the MSP, and therefore the viscosity of its solutions, depends on the oxidation state of the copper ion. We use a combination of UV-Vis, viscosity, light scattering, cyclic voltammetry and SAXS to show that the ligands, 2,6-bis(N-methylbenzimidazolyl)pyridine (MeBip), at the ends of the pTHF, bind copper(ii) in a 2:1 ratio and copper(i) in a 2:2 ratio in solution. Thus at fixed 1:1 or 1:2 stoichiometry of macromonomer to copper ions the viscosity of their solutions shows dramatic changes in response to addition of a chemical oxidant (nitroso tetrafluoroborate) or reductant (aqueous ascorbic acid).

Original languageEnglish
Pages (from-to)3132-3138
Number of pages7
JournalPolymer Chemistry
Volume3
Issue number11
DOIs
Publication statusPublished - 2012 Nov
Externally publishedYes

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ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Biochemistry
  • Biomedical Engineering
  • Bioengineering

Cite this

Miller, A. K., Li, Z., Streletzky, K. A., Jamieson, A. M., & Rowan, S. J. (2012). Redox-induced polymerisation/depolymerisation of metallo-supramolecular polymers. Polymer Chemistry, 3(11), 3132-3138. https://doi.org/10.1039/c2py20307c