开启用于检测溶液和市售牙膏中氟离子的荧光传感器。
"Switch on" fluorescent sensor for the detection of fluoride ions in solution and commercial tooth paste.
机构信息
Department of Chemistry, Panjab University, Chandigarh 160014, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Dec 5;223:117361. doi: 10.1016/j.saa.2019.117361. Epub 2019 Jul 9.
A simple and novel uracil based chemosensor (1) has been developed by one step reaction, which selectively detected F ions via "switch on" fluorescence mode. Upon the addition of F ion to CHCN solution of 1, the non-fluorescent probe became highly fluorescent, showing a color change from colorless to fluorescent blue, when irradiated with 280nm light. H NMR studies revealed the binding sites of chemosensor 1, where C-5 hydrogen and amine hydrogens formed hydrogen bonding with F ion. This binding mode was further confirmed using DFT calculations. Significantly, the detection limit of chemosensor 1 towards F has been evaluated to be 47.6nM, which is lower than the maximum values of F (1.5mg/L) ions permitted by WHO. The in-situ generated 1-F complex has been used for secondary sensing of Ca(NO), one of the component of the fertilizer. Moreover, the sensor has been successfully applied for detection of fluoride ion in commercial tooth paste.
一种简单新颖的基于尿嘧啶的化学传感器（1）通过一步反应合成，通过“开启”荧光模式选择性地检测 F 离子。向 1 的 CHCN 溶液中加入 F 离子后，非荧光探针变得高度荧光，当用 280nm 光照射时，颜色从无色变为荧光蓝色，发生颜色变化。1H NMR 研究揭示了化学传感器 1 的结合位点，其中 C-5 氢和胺氢与 F 离子形成氢键。使用 DFT 计算进一步证实了这种结合模式。值得注意的是，化学传感器 1 对 F 的检测限已评估为 47.6nM，低于世界卫生组织允许的 F（1.5mg/L）离子的最高值。原位生成的 1-F 配合物已用于肥料成分之一 Ca（NO）的二次传感。此外，该传感器已成功应用于商业牙膏中氟离子的检测。
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