We synthesized an original reversible colorimetric chemosensor PDJ ((E)-9-((2-(6-chloropyridazin-3-yl)hydrazono)methyl)-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-8-ol) for the detection of F⁻. PDJ displayed a selective colorimetric detection to F⁻ with a variation of color from colorless to yellow. Limit of detection of PDJ for F⁻ was calculated as 12.1 µM. The binding mode of PDJ and F⁻ turned out to be a 1:1 ratio using Job plot. Sensing process of F⁻ by PDJ was demonstrated by ¹H NMR titration and DFT calculation studies that suggested hydrogen bond interactions followed by deprotonation. Moreover, the practicality of PDJ was demonstrated via a reversible test with TFA (trifluoroacetic acid).

我们合成了一种原始的可逆比色化学传感器PDJ ( (E)-9-((2-(6-chloropyridazin-3-yl)hydrazono)methyl)-2,3,6,7-tetrahydro-1H,5H-pyrido[3 ,2,1-ij]quinolin-8-ol) 用于检测 F ⁻。PDJ显示了对^F的选择性比色检测，颜色从无色到黄色变化。F ^-的PDJ检测限计算为 12.1 µM。PDJ和 F的结合模式^-使用 Job 图证明是 1:1 的比例。PDJ对F ⁻的传感过程由¹证明H NMR 滴定和 DFT 计算研究表明氢键相互作用，然后是去质子化。此外， PDJ的实用性通过使用 TFA（三氟乙酸）的可逆测试得到证明。