A New Fluoride Colorimetric Chemosensor Based on Coumarin

doi:10.7517/j.issn.1674-0475.2008.06.468

Abstract

Abstract: A new fluoride colorimetric chemosensor 1 was designed and synthesized based on coumafin derivatives.A significant color change from pale pink to blueviolet was observed visually (naked-eye) upon addition of fluoride ions to a solution of compound 1 in acetonitrile,and other an-ions include Cl^-,Br^-,I^-,H₂PO₄^-,NO₃^-,HSO₄^-,AcO^-,almost have no changes.On the other hand,the F^- ion first establishes a hydrogen-bonding interaction with 1 and then on addition of more F^- ion,induces-N-H deprotonation,due to the formation of [FHF]^-.The deprotonation process promotes intramolecular charge transfer of 1 and induces a red shift of its absorption spectrum.

Key words: coumarin, fluoride ions, colorimetric chernosensor

CLC Number:

GUO Hang-ming, LIU Wei-min, SHENG Rui-long, WANG Fang, WANG Peng-fei, WU Shi-kang. A New Fluoride Colorimetric Chemosensor Based on Coumarin[J]. Imaging Science and Photochemistry, 2008, 26(6): 468-473.

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