ZHANG Yi-qi,FANG Xin-hang,WANG Hao,CHANG Wei-jie,QIAN Jun-hong.A Coumarin-based Fluorescent Probe for Detection of Intracellular Viscosity and Polarity in Different Channels[J].Journal of Instrumental Analysis,2024,43(12):1965-1970.
ZHANG Yi-qi,FANG Xin-hang,WANG Hao,CHANG Wei-jie,QIAN Jun-hong.A Coumarin-based Fluorescent Probe for Detection of Intracellular Viscosity and Polarity in Different Channels[J].Journal of Instrumental Analysis,2024,43(12):1965-1970. DOI: 10.12452/j.fxcsxb.24033104.
A Coumarin-based Fluorescent Probe for Detection of Intracellular Viscosity and Polarity in Different Channels
A coumarin fluorescent probe 2-(2-(2-(7-(diethylamino)-2-oxo-2H-chromen-3-yl)vinyl)-4H-chromen-4-ylidene)malononitrile(DEA-DCM) was designed and synthesized based on the intramolecular charge transfer(ICT) mechanism. The electronic and charge distributions of the probe in different orbitals were calculated with Gaussian 16W software,to theoretically analyze the response mechanism of the designed probe toward polarity and viscosity. The effects of polarity and viscosity on the photophysical properties of the probe were investigated by using mixed solvents with different volume ratios of methanol-dioxane or methanol-glycerol as the model solvents for polarity and viscosity,respectively. The experimental results illustrate that the two emission peaks of DEA-DCM at 690 nm and 470 nm respond to solvent’s polarity and viscosity,respectively. The fluorescence intensities exhibit good linear relationship with microenvironmental parameters. DEA-DCM could differentiate the changes between intracellular polarity and viscosity in different optical channels.
关键词
香豆素粘度极性分子内电荷转移
Keywords
coumarinviscositypolarityintramolecular charge transfer
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