Abstract
Nature uses mechanochemical transduction processes to achieve diverse and vital functions, such as hearing, cellular adhesion and gating of ion channels. One fascinating example of biological mechanotransduction is the emission of light on mechanical stimulation. However, molecular-level transduction of force into luminescence in a synthetic system remains a challenge. Here, we show that bis(adamantyl)-1,2-dioxetane emits visible light when force is applied to a polymer chain or network in which this unit is incorporated. Bright-blue luminescence was observed on sonication of solutions of dioxetane-containing linear polymers and on the straining of polymer networks with dioxetane crosslinkers. Light is emitted from the adamantanone-excited state that forms on opening of the four-membered dioxetane ring. Increased sensitivity and colour tuning were achieved by energy transfer to suitable acceptors. High spatial and temporal resolutions highlight the potential to study the failure of polymeric materials in unprecedented detail.
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Acknowledgements
This work was supported by grants from the Netherlands Organization for Scientific Research. We thank H. J. Zhu for help with recording the videos, and L. E. Govaert and S. C. Meskers for helpful discussions.
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R.P.S. and E.W.M. conceived the concept, R.P.S. directed the research, Y.C., A.J.H.S., S.K. and G.W.M.P designed and performed the experiments and analysed the data. All of the authors participated in writing the paper.
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Chen, Y., Spiering, A., Karthikeyan, S. et al. Mechanically induced chemiluminescence from polymers incorporating a 1,2-dioxetane unit in the main chain. Nature Chem 4, 559–562 (2012). https://doi.org/10.1038/nchem.1358
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DOI: https://doi.org/10.1038/nchem.1358
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