| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 177151 | Dyes and Pigments | 2011 | 8 Pages |
A series of novel coumarin dyes (3–12) were designed and synthesized. The structures of the dyes were characterized by IR, 1H NMR, 13C NMR, 19F NMR, MS and single crystal X-ray diffraction. 3-(2-Benzoylhydrazonotrifluoroethyl)-7-(N,N-diethylamino)coumarin (11) could recognize Cu2+ and Ni2+ selectively in aqueous solution. Upon addition of Cu2+ or Ni2+ to 11 a blue shift or a bathochromatic shift of the absorption band was observed while the emission band blue-shifted with decrease in the fluorescence intensity. Upon addition of Cu2+ the color of the solution of 11 changed from orange to red. The results showed that 11 could be used as an optical chemosensor of Cu2+ and Ni2+.
► Novel coumarin dyes were synthesized and characterized. ► A coumarin dye (11) could recognize Cu2+ and Ni2+ selectively in aqueous solution. ► Upon addition of Cu2+ the color of the coumarin solution changed from orange to red.
