کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5212712 | 1383129 | 2017 | 5 صفحه PDF | دانلود رایگان |
A novel coumarin-based compound 1 featuring thiosemicarbazone as binding unit, was reported as a colorimetric and fluorescent probe for the detection of fluoride anion. The addition of Fâ to a solution of probe 1 in tetrahydrofuran resulted in evident naked-eye color change from green-yellow to orange-red under daylight and obvious fluorescence quenching within 3Â s. And the detection limit toward Fâ was calculated to be as low as 2.16Â ÃÂ 10â7Â mol/L. 1H NMR titrations proved that the interaction between 1 and fluoride ion: hydrogen bond at low fluoride ion concentration, deprotonation at high fluoride ion concentration. Besides, it exhibited highly sensitivity and selectivity for Fâ over other examined ions (Clâ, Brâ, Iâ, AcOâ, NO3â, HSO4â, H2PO4â) in tetrahydrofuran solution.
A colorimetric and fluorescent sensor for the detection of fluoride anion has been designed and synthesized. The sensor showed evident naked-eye color variation from green-yellow to orange-red after treatment with Fâ, and its fluorescence was effectively quenched within 3Â s.166
Journal: Tetrahedron - Volume 73, Issue 10, 9 March 2017, Pages 1306-1310