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A novel pyrazolone pyridine-containing ligand,2,6-bis(1-phenyl-4-ethoxycarbonyl-5-pyrazolone-3-yl)pyridine (H2L) was de-signed and synthesized from pyridine-2,6-dicarboxylic acid (1),and its Eu(III) and Tb(III) complexes were prepared.The ligand and com-plexes were characterized in detail based on FT-IR spectra,1H NMR,elemental analysis and thermal analysis,and the formula of Ln2L3·4H2O (Ln=Eu or Tb) of rare earth complexes was confirmed.The UV-vis absorption spectra and photoluminescence properties of the complexes were investigated,which showed that the Eu(III) and Tb(III) ions could be sensitized efficiently by the ligand (H2L) and emit the photolumi-nescence with high intensity,narrow half-peak width,and monochromic light.The results indicated that the complexes showed potential as excellent luminescent materials.
A novel pyrazolone pyridine-containing ligand, 2,6-bis (1-phenyl-4-ethoxycarbonyl-5-pyrazolone-3-yl) pyridine 1), and its Eu (III) and Tb (III) complexes were prepared. The ligand and com plexes were detailed in on FT-IR spectra, 1H NMR, elemental analysis and thermal analysis, and the formula of Ln2L3 · 4H2O (Ln = Eu or Tb) of rare earth complexes was confirmed. UV-vis absorption spectra and photoluminescence properties of the complexes were investigated, which showed that the Eu (III) and Tb (III) ions could be sensitized efficiently by the ligand (H2L) and emit the photolumi-nescence with high intensity, narrow half-peak width, and monochromic light. The results indicated that the complexes showed potential as excellent luminescent materials.