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A novel strategy for realizing dual state fluorescence and low-temperature phosphorescence

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Abstract

We demonstrate a new strategy for the development of dual-state emissive materials by introducing phenyl groups to triphenylpyrrole (TPP) isomers. The phenyl group can increase the rotational barrier and restrict the intramolecular rotation of TPP, thus enhancing the fluorescence efficiency of aggregation induced emission (AIE) materials in solution. Fluorescence of TPP derivatives was not quenched by the drastic intermolecular collision and intramolecular motion at high temperature. On the contrary, the fluorescence of their solutions showed a positive response to temperature. Theoretical calculations demonstrated that the molecules exhibited a higher planar conformation at high temperature. Three donor–acceptor samples with a twisted intramolecular charge transfer (TICT) effect showed a strong phosphorescence with a lifetime up to 10 s at low temperature.

Graphical abstract: A novel strategy for realizing dual state fluorescence and low-temperature phosphorescence

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Publication details

The article was received on 28 Nov 2018, accepted on 11 Dec 2018 and first published on 11 Dec 2018


Article type: Research Article
DOI: 10.1039/C8QM00613J
Citation: Mater. Chem. Front., 2019, Advance Article
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    A novel strategy for realizing dual state fluorescence and low-temperature phosphorescence

    Y. Lei, W. Dai, Z. Liu, S. Guo, Z. Cai, J. Shi, X. Zheng, J. Zhi, B. Tong and Y. Dong, Mater. Chem. Front., 2019, Advance Article , DOI: 10.1039/C8QM00613J

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