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Issue 21, 2018
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Separately enhanced dual emissions of the amphiphilic derivative of 2-(2′-hydroxylphenyl) benzothiazole by supramolecular complexation

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Abstract

Here, we report separately enhanced dual emissions of the amphiphilic derivative of 2-(2′-hydroxyphenyl)benzothiazole (denoted as HBT-11) by supramolecular complexation with cyclodextrins (CDs). When dispersed in water, HBT-11 shows two relatively weak emission bands, which can be assigned to the emissions of enol- and keto-forms, the two tautomers, owing to excited-state intramolecular proton transfers. Upon the addition of α-CD and β-CD, the keto- and enol-emissions, respectively, are separately enhanced; the enhancement effect is due to the formation of HBT-11/α-CD and HBT-11/β-CD complexes through multiple hydrogen bonding and host–guest interactions, respectively. It is worth to note that the keto-emission caused by the complex of HBT-11/α-CD has a much shorter wavelength compared with that of the aggregates formed by pure HBT-11. To the best of our knowledge, this is the first time that a study on keto-emission of the isolated HBT chromophore has been reported.

Graphical abstract: Separately enhanced dual emissions of the amphiphilic derivative of 2-(2′-hydroxylphenyl) benzothiazole by supramolecular complexation

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Publication details

The article was received on 17 Mar 2018, accepted on 01 May 2018 and first published on 01 May 2018


Article type: Paper
DOI: 10.1039/C8SM00552D
Citation: Soft Matter, 2018,14, 4374-4379
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    Separately enhanced dual emissions of the amphiphilic derivative of 2-(2′-hydroxylphenyl) benzothiazole by supramolecular complexation

    C. Wu, Y. Jin, D. Li, L. Ding, Y. Xing, K. Zhang and B. Song, Soft Matter, 2018, 14, 4374
    DOI: 10.1039/C8SM00552D

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