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Planar 2-(2-hydroxyphenyl)benzothiazole-based dyes functionalized via triple bonds as exceedingly efficient solid-state fluorophores

Abstract

Two crystalline 2-(2-hydroxyphenyl)benzothiazole (HBT) derivatives, phenylethynyl-modified HBT (HBT-H) and 4-methylphenylethynyl-modified HBT (HBT-Me), show large Stokes shifts and exceedingly high fluorescence quantum yields (Φf) despite lacking sterically bulky groups or propeller-shaped moieties in their extended π-conjugated planar structures. Furthermore, although the intramolecular H-bonding in HBT-Me is weaker than that in HBT-H, the Φf of crystalline HBT-Me (91.19%) is higher than that of crystalline HBT-H (75.46%). X-ray diffraction analysis demonstrates that HBT-Me and HBT-H crystals form J- and weak H-aggregates, respectively.

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Publication details

The article was received on 14 Jun 2017, accepted on 07 Aug 2017 and first published on 08 Aug 2017


Article type: Communication
DOI: 10.1039/C7CE01108C
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Planar 2-(2-hydroxyphenyl)benzothiazole-based dyes functionalized via triple bonds as exceedingly efficient solid-state fluorophores

    Y. Niu , L. Xu, Q. Wang, H. Wu and Y. Zhang, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01108C

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