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A novel coumarin-based switching-on fluorescent and colorimetric sensor for F−
- Source :
-
Journal of Luminescence . May2009, Vol. 129 Issue 5, p501-505. 5p. - Publication Year :
- 2009
-
Abstract
- Abstract: A novel turn-on fluorescent and colorimetric sensor, N-(4′-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 F− to the DMSO solution of 1 resulted in an enhancement in fluorescence intensity at 338 and 352nm, 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 F− was investigated by 1H NMR experiments. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 129
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 36567611
- Full Text :
- https://doi.org/10.1016/j.jlumin.2008.12.003