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Thermally activated delayed fluorescence and room-temperature phosphorescence in naphthyl appended carbazole–quinoline conjugates, and their mechanical regulation

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Abstract

The influences of naphthyl and/or phenyl rings at the 2,4-positions of the quinolinyl fragments in carbazole–quinoline conjugates are studied. The centric phase of one of the conjugates (β-CQNN) revealed both thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP), while prompt fluorescence and RTP were observed in the non-centric phase (α-CQNN) that can regenerate the emission features of β-CQNN via mechanical grinding. This unique observation is explained by the modulation of the higher-lying triplet (T2) energy level caused by conformational change.

Graphical abstract: Thermally activated delayed fluorescence and room-temperature phosphorescence in naphthyl appended carbazole–quinoline conjugates, and their mechanical regulation

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Publication details

The article was received on 20 Nov 2018, accepted on 09 Jan 2019 and first published on 09 Jan 2019


Article type: Communication
DOI: 10.1039/C8CC09220F
Citation: Chem. Commun., 2019, Advance Article
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    Thermally activated delayed fluorescence and room-temperature phosphorescence in naphthyl appended carbazole–quinoline conjugates, and their mechanical regulation

    I. Bhattacharjee, N. Acharya and D. Ray, Chem. Commun., 2019, Advance Article , DOI: 10.1039/C8CC09220F

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