期刊
DYES AND PIGMENTS
卷 151, 期 -, 页码 194-201出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2017.12.039
关键词
Isophorone-based dye; Near-infrared fluorescence; Large Stokes shift; Thiophenol; DFT calculations; Fluorescent imaging
资金
- Natural Science Foundation of Shanghai [16ZR1408000]
- National Key Program of China [2016YFA0200302]
- Natural Science Foundation of Shanghai [16ZR1408000]
- National Key Program of China [2016YFA0200302]
In view of thiophenol contaminants and their adverse effects in environment, it is valuable to develop an effective probe for thiophenols. Based on a large Stokes shift (126 nm) NIR-illuminant platform (Compound 2), we developed a colorimetric and off-on near-infrared (NIR) fluorescent probe (NIRP) to selectively discriminate thiophenols from various analytes including aliphatic thiols. NIRP is dually quenched (ICT blocked quenching and PET quenching), thus achieving large signal-to-noise ratio and high sensitivity for thiophenol detection. For the first time, the unique NIR-illuminant phenomenon of 2' and the d-PET quenching process on NIRP are revealed by the density functional theory (DFT) calculations. Moreover, we demonstrate the practical applications of NIRP, including the quantitative thiophenol detection in environmental water samples and NIR fluorescent imaging of thiophenol in HeLa cells.
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