Novel coumarin fluorescent dyes: Synthesis, structural characterization and recognition behavior towards Cu(II) and Ni(II)
摘要:
A series of novel coumarin dyes (3-12) were designed and synthesized. The structures of the dyes were characterized by IR, H-1 NMR, C-13 NMR, F-19 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+. (C) 2011 Elsevier Ltd. All rights reserved.
Novel coumarin fluorescent dyes: Synthesis, structural characterization and recognition behavior towards Cu(II) and Ni(II)
摘要:
A series of novel coumarin dyes (3-12) were designed and synthesized. The structures of the dyes were characterized by IR, H-1 NMR, C-13 NMR, F-19 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+. (C) 2011 Elsevier Ltd. All rights reserved.
A tertiary phosphine-mediated [3+2] cyclization reaction of ynones with fluorinated coumarin derivatives has been developed to give a series of coumarin-based CF3-containing furanones in moderate to good yields under mild reaction conditions. Preliminary investigation into their antitumor activities is also presented.