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Issue 33, 2019
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Anthracene-based mechanophores for compression-activated fluorescence in polymeric networks

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Abstract

The recent attention given to functionalities that respond to mechanical force has led to a deeper understanding of force transduction and mechanical wear in polymeric materials. Furthermore, polymers have been carefully designed such that activation of “mechanophores” leads to productive outputs, such as material reinforcement or changes in optical properties. In this work, a crosslinker containing an anthracene–maleimide linkage was designed and used to prepare networks that display a fluorescence response when damaged. The pressure-dependent damage of poly(N,N-dimethylacrylamide) networks was monitored using solid-state fluorescence spectroscopy, with increasing compressive forces leading to higher degrees of mechanophore activation. When a stamp was used to compress the networks, only the areas in contact with the raised portion of the stamp underwent mechanophore activation, resulting in the generation of patterns that were only visible under UV light. Finally, an isomeric “flex” mechanophore was designed and used to prepare networks that were compressed and compared to the previously described networks.

Graphical abstract: Anthracene-based mechanophores for compression-activated fluorescence in polymeric networks

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Publication details

The article was received on 21 May 2019, accepted on 26 Jun 2019 and first published on 08 Jul 2019


Article type: Edge Article
DOI: 10.1039/C9SC02487E
Chem. Sci., 2019,10, 7702-7708
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Anthracene-based mechanophores for compression-activated fluorescence in polymeric networks

    C. P. Kabb, C. S. O'Bryan, C. D. Morley, T. E. Angelini and B. S. Sumerlin, Chem. Sci., 2019, 10, 7702
    DOI: 10.1039/C9SC02487E

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