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• W3166515512 endingPage "109500" @default.
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• W3166515512 abstract "Near-infrared (NIR) fluorophores have promoted the development of materials for bioimaging and therapy, but traditional NIR dyes usually suffer from aggregation-caused quenching (ACQ), impeding their applications. Herein, we propose a difluoroboron β-diketonate complex TTBE , consisting a donor-acceptor (D-A) structure with difluoroboron moiety as an electron acceptor and N , N -diethylaniline as well as triphenylamine (TPA)-thiophene building block as two electron donors . TTBE exhibited both solvatochromism and aggregation-induced emission (AIE) characteristics. In polar solvent DMSO, the emission maxima of TTBE were observed at 680 nm with low fluorescence quantum yield (Φ F = 0.01%), while in less polar solvent CH 2 Cl 2 , its emission maxima blue-shifted to 666 nm with increased fluorescence quantum yield (Φ F = 0.41%). The fluorescence of TTBE could be enhanced 650-fold in 90% hexane/THF mixture solution relatively to that in pure THF. Moreover, the fabricated F127/ TTBE nanoparticles (NPs) showed NIR emission at 735 nm in water and excellent cytocompatibility even at high concentration (100 μg/mL). According to the results of cell imaging and flow cytometry, NPs were easily internalized into cells and distributed in the cytoplasm with strong red fluorescence. Therefore, this research inspires more insight into development of NIR AIE luminogens for biomedical imaging. Chemical structures of the NIR AIEgen (TTBE) and schematic illustration of this AIEgen for cellular imaging. • A near infrared emitting difluoroboron β-diketonate dye with AIE characteristics was synthesized. • Nanoparticles including NIR AIEgen were prepared through nanoprecipitation and emitted at 735 nm with 0.57% of fluorescence quantum yield. • The nanoparticles displayed excellent cytocompatibility, and successfully applied to cellular imaging." @default.
• W3166515512 created "2021-06-22" @default.
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• W3166515512 date "2021-09-01" @default.
• W3166515512 modified "2023-10-14" @default.
• W3166515512 title "Near-infrared-emitting difluoroboron β-diketonate dye with AIE characteristics for cellular imaging" @default.
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• W3166515512 doi "https://doi.org/10.1016/j.dyepig.2021.109500" @default.
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