Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1352-5. doi: 10.1016/j.saa.2011.04.068. Epub 2011 May 26.
A novel visible colorimetric sensor (L1) with high selectivity for fluoride ion based on coumarin has been synthesized by a simple modification of our earlier report. The chemosensor L1 shows an obvious color change from yellow to blue upon addition of fluoride ion with a large red shift of 145 nm in acetonitrile, and without interference of other anions such as Cl-, Br-, I-, NO3-, H2PO4-, HSO4-, and AcO-. The investigation of 1H NMR spectrum titration indicates the proposed mechanism is that F- first establishes a hydrogen bonding interaction with L1, and then the formation of [F-H-F]- induces deprotonation.
一种新型的基于香豆素的对氟离子具有高选择性的可见比色传感器（L1）已通过对我们之前报告的简单修饰合成。化学传感器 L1 在加入氟离子后，在乙腈中表现出明显的颜色从黄色变为蓝色，并且有 145nm 的明显红移，而没有其他阴离子（如 Cl-、Br-、I-、NO3-、H2PO4-、HSO4-和 AcO-）的干扰。1H NMR 光谱滴定研究表明，所提出的机制是 F-首先与 L1 建立氢键相互作用，然后形成[F-H-F]-诱导去质子化。
