铕与苯乙酮酸、1，10-罗啉及三苯基氧膦配合物的合成、结构表征及荧光性能的研究

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Abstract Three novel europium complexes, Eu-L, EuL₃phen and EuL₂(TPPO)₂NO₃, were synthesized (HL=phenylglyoxylic, phen=1,10-phenanthroline, and TPPO=triphenyl phosphine oxide). The complexes were characterized by elemental analysis, conductivity, IR, and ¹H NMR. The IR spectra indicated that all the complexes havea a larger Δν(ν_as(CO^-₂)-ν_S(CO^-₂) than that of NaL, and carboxylate ions in the phenylglyoxyate coordinated as unidentate ligands. And α-aeto also coordinated with the europium ions. In ¹H NMR, the signals of hydrogens in the phenylglyoxyate shifted toward upfield, and those in phen or TPPO slightly shifted.The excitation and emission spectra were recorded at room temperature, and the excitation spectra showed that the optimum excitation wavelengths were 374.0, 358.2 and 383.4 nm, Five emission bands of the complexes due to ⁵D₀—⁷F₀, ⁵D₀—⁷F₁, ⁵D₀—⁷F₂, ⁵D₀—⁷F₃ and ⁵D₀—⁷F₄ transitions were observed in the region of 550-720 nm (Eu-L: 577.8, 590.2, 614.0, 648.4 and 695.4 nm; EuL₃phen: 578.0, 588.4, 591.6, 611.2, 617.0, 649.4, 687.6 and 698.6 nm; EuL₂(TPPO)₂NO₃: 577.8, 590.4, 614.6, 649.2 and 697.6 nm). The emission intensities of europium ions were obviously sensitized by TPPO.

Key words：Europium;Phenylglyoxylic acid;Complexes;IR spectra;Fluorescence spectra

Received: 2005-01-08 Accepted: 2005-04-28

ZTFLH:

O614.3

Corresponding Authors: SUN Bo

Cite this article:

ZHANG Yan-hui,SUN Bo,YAN Xiao-qi, et al. Synthesis, Structure Characterization and, Fluorescence Studies of the Complexes of Europium with Phenylglyoxylic Acid, 1,10-Phenanthroline and Triphenyl Phosphine Oxide [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(12): 2034-2038.

URL:

https://www.gpxygpfx.com/EN/Y2005/V25/I12/2034

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