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Issue 26, 2018
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Pyrene spiropyran dyad: solvato-, acido- and mechanofluorochromic properties and its application in acid sensing and reversible fluorescent display

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Abstract

Fluorescent molecular switches have great application potential in sensing and data storage. Materials that exhibit fluorescence switching properties both in solution and in solid state cannot be easily synthesized because of the contrasting ACQ and AIE effects. Herein, a dyad of pyrene-decorated spiropyran was designed via single bond linkage, and the material exhibited solvent polarity-correlated blue to green emission in solution and blue emission in solid state, although neither pyrene nor spiropyran emit in the visible light region. Acidic conditions could trigger the isomerization of spiropyran moiety to the protonated merocyanine (MCH) form accompanied by the disappearance of emission in solution. Crystalline Py–MCH exhibited red/dark “on/off” fluorescent switch upon grinding. Moreover, acid sensing and reversible fluorescent display were demonstrated based on Py–Sp-doped polymer nanofibers and films utilizing stimuli-responsive emission switching property.

Graphical abstract: Pyrene spiropyran dyad: solvato-, acido- and mechanofluorochromic properties and its application in acid sensing and reversible fluorescent display

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Publication details

The article was received on 07 May 2018, accepted on 10 Jun 2018 and first published on 12 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC02208A
Citation: J. Mater. Chem. C, 2018,6, 6940-6948
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    Pyrene spiropyran dyad: solvato-, acido- and mechanofluorochromic properties and its application in acid sensing and reversible fluorescent display

    X. Su, Y. Ji, W. Pan, S. Chen, Y. Zhang, T. Lin, L. Liu, M. Li, Y. Liu and S. X. Zhang, J. Mater. Chem. C, 2018, 6, 6940
    DOI: 10.1039/C8TC02208A

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