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Issue 32, 2018
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Perylene bisimide with diphenylacrylonitrile on side-chain: strongly fluorescent liquid crystal with large pseudo Stokes shift based on AIE and FRET effect

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Abstract

A novel perylene bisimide (PBI) derivative with an AIE-active diphenylacrylonitrile unit positioned at the terminal N-imide position through a flexible spacer has been synthesized and characterized. The DSC, POM and XRD studies confirmed that it could self-assemble into a stable hexagonal columnar liquid-crystalline phase between 56 °C and 160 °C. This PBI derivative also exhibited strong fluorescence in solution, thin film and mesophase based on the cooperative mechanism of AIE and FRET between the diphenylacrylonitrile group and perylene moiety. The pseudo Stokes shift was as large as 283 nm, and the fluorescence quantum yields were as high as 0.62–0.79 in solution and 0.68–0.86 in solid state. This study provides a good strategy for converting the columnar liquid crystal with ACQ effect to one with the AIE effect, successfully filling the gap between the excellent columnar mesomorphic properties and strong fluorescence in solid state.

Graphical abstract: Perylene bisimide with diphenylacrylonitrile on side-chain: strongly fluorescent liquid crystal with large pseudo Stokes shift based on AIE and FRET effect

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Publication details

The article was received on 11 Jun 2018, accepted on 16 Jul 2018 and first published on 17 Jul 2018


Article type: Paper
DOI: 10.1039/C8SM01183D
Citation: Soft Matter, 2018,14, 6737-6744
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    Perylene bisimide with diphenylacrylonitrile on side-chain: strongly fluorescent liquid crystal with large pseudo Stokes shift based on AIE and FRET effect

    M. Zhu, Y. Chen, X. Zhang, M. Chen, H. Guo and F. Yang, Soft Matter, 2018, 14, 6737
    DOI: 10.1039/C8SM01183D

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