化学
荧光团
荧光
斯托克斯位移
喹啉
香豆素
二氧化硫
检出限
光化学
硫黄
组合化学
色谱法
有机化学
光学
物理
作者
Fengting Liu,Na Li,Yongshun Chen,Hui-Ying Yu,Jun‐Ying Miao,Bao‐Xiang Zhao
标识
DOI:10.1016/j.aca.2022.339908
摘要
Sulfur dioxide derivatives (HSO3- and SO32-) play an important role in food preservative, antibacterial, antioxidant and other aspects, so it is urgent for us to develop more efficient detection methods to broaden their application in biochemical research and related disease diagnosis. Fluorescent probes are of particular interest because of their simplicity and high temporal and spatial resolution. Herein, we constructed a new near-infrared (NIR) fluorescence probe, CQC, composed of coumarin fluorophore and quinoline fluorophore, for detecting SO2 derivatives. The near-infrared emission probe CQC with a large Stokes shift (260 nm) not only kept the distance between the two emission peaks large enough (165 nm), but also had a particularly high energy transfer efficiency (99.5%), and was particularly sensitive to the detection of HSO3-/SO32- (LOD: 0.1 μM). The powerful probe CQC succeeded in real-time visualizing endogenous HSO3-/SO32- in living cells.
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