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Issue 9, 2012
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Cyanostilben-based derivatives: mechanical stimuli-responsive luminophors with aggregation-induced emission enhancement

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Abstract

Cyanostilbene derivatives with the aggregation-induced emission enhancement (AIEE) activity are prepared by Knoevenagel and Suzuki reactions. Among them, the dye (Z)-2,3-bis(4′-(diphenylamino)-[1,1′-biphenyl]-4-yl)acrylonitrile (CNS-4) nanoparticle suspension shows the polarity-dependent characteristics of the fluorescence properties. By the fluorescence spectroscopy and transmission electron microscopy (TEM) analysis, the restriction of transfer from the local excited (LE) state to the intramolecular charge-transfer (ICT) state and crystal formation results in a blue-shift in emission and enhances the intensity in the aggregate state. Additionally, the luminophors CNS-3 and CNS-4 possess the AIEE effect as well as mechanochromic fluorescent properties. This mechanofluorochromic behavior originates from the change between the crystalline and the amorphous state.

Graphical abstract: Cyanostilben-based derivatives: mechanical stimuli-responsive luminophors with aggregation-induced emission enhancement

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Publication details

The article was received on 12 Dec 2011, accepted on 16 May 2012 and first published on 22 Jun 2012


Article type: Paper
DOI: 10.1039/C2PP05404C
Citation: Photochem. Photobiol. Sci., 2012,11, 1414-1421

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    Cyanostilben-based derivatives: mechanical stimuli-responsive luminophors with aggregation-induced emission enhancement

    Y. Zhang, J. Sun, G. Bian, Y. Chen, M. Ouyang, B. Hu and C. Zhang, Photochem. Photobiol. Sci., 2012, 11, 1414
    DOI: 10.1039/C2PP05404C

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