亚硫酸氢盐
亚硫酸盐
荧光
化学
斯托克斯位移
苯并噻唑
牛肝菌
核化学
光化学
无机化学
蘑菇
有机化学
生物化学
食品科学
DNA甲基化
基因表达
物理
基因
量子力学
作者
Yang Li,Xiaofei Sun,Lulu Zhou,Li Tian,Keli Zhong,Jinglin Zhang,Xiaomei Yan,Lijun Tang
标识
DOI:10.1021/acs.jafc.2c04571
摘要
Despite their status of being widely used as food additives, bisulfite (HSO3-)/sulfite (SO32-) can pose serious health risks when they are excessively added. Therefore, it is vital to develop a new method for detecting HSO3-/SO32- in foodstuff. In this paper, a benzopyran-benzothiazole derivative (probe DCA-Btl) with near-infrared emission was designed and synthesized by constructing a "push-pull" electronic system. DCA-Btl can selectively recognize HSO3-/SO32- via a colorimetric and fluorescence dual channel in DMF/PBS (1:1, v/v, pH = 8.4), and the emission wavelength of DCA-Btl can reach 710 nm. The fluorescence quenching of DCA-Btl after recognition of HSO3- is attributed to the photoinduced electron transfer (PET) process of the adduct DCA-Btl-HSO3- as evaluated by the DFT/TD-DFT method. In addition, DCA-Btl has many advantages, including a large Stokes shift (95 nm), good anti-interference ability, and little cytotoxicity. What's more, DCA-Btl has been successfully applied for the detection of HSO3-/SO32- in actual water samples and food samples such as sugar, red wine, and biscuits with satisfying results, as well as for fluorescent imaging of HSO3- in living MCF-7 cells.
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