Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403285 | Journal of Luminescence | 2009 | 5 Pages |
Abstract
A novel turn-on fluorescent and colorimetric sensor, N-(4â²-nitrophenyl)-2-oxo-6-(phenylazo)-2H-chromene-3-carbohydrazide (1), for fluoride in dimethyl sulfoxide (DMSO) was designed and synthesized. The binding ability evaluated by UV-vis and fluorescence titration experiments reveals that 1 can selectively recognize fluoride. In particular, addition of Fâ to the DMSO solution of 1 resulted in an enhancement in fluorescence intensity at 338 and 352Â nm, which can provide a way of 'naked-eye' detection for fluorides. The spectral change of 1 is due to the anion-induced increase of the charge density in and the rigidity of the host molecule. Furthermore, the binding mode with Fâ was investigated by 1H NMR experiments.
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Physical and Theoretical Chemistry
Authors
Jianwei Li, Hai Lin, Zunsheng Cai, Huakuan Lin,