Optically responsive supramolecular polymer glasses

Diederik W. R. Balkenende, Christophe A. Monnier, Gina L. Fiore and Christoph Weder ()
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Diederik W. R. Balkenende: Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4
Christophe A. Monnier: Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4
Gina L. Fiore: Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4
Christoph Weder: Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract The reversible and dynamic nature of non-covalent interactions between the constituting building blocks renders many supramolecular polymers stimuli-responsive. This was previously exploited to create thermally and optically healable polymers, but it proved challenging to achieve high stiffness and good healability. Here we present a glass-forming supramolecular material that is based on a trifunctional low-molecular-weight monomer ((UPyU)3TMP). Carrying three ureido-4-pyrimidinone (UPy) groups, (UPyU)3TMP forms a dynamic supramolecular polymer network, whose properties are governed by its cross-linked architecture and the large content of the binding motif. This design promotes the formation of a disordered glass, which, in spite of the low molecular weight of the building block, displays typical polymeric behaviour. The material exhibits a high stiffness and offers excellent coating and adhesive properties. On account of reversible dissociation and the formation of a low-viscosity liquid upon irradiation with ultraviolet light, rapid optical healing as well as (de)bonding on demand is possible.

Date: 2016
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DOI: 10.1038/ncomms10995

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