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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摘要：以硝酸铕、苯乙酮酸(HL)、1，10-罗啉(phen)和三苯基氧膦(TPPO)合成了Eu-L，EuL₃phen和EuL₂(TPPO)₂NO₃三种新型固态配合物。用元素分析、电导率、红外光谱、核磁共振谱对配合物进行了表征，确定了三元配合物的组成。IR表明，苯乙酮酸与Eu³⁺离子形成配合物后Δν(ν_as(CO^-₂)—ν_S(CO^-₂))(Δν(Eu-L)=391 cm^-1;Δν(EuL₃phen)=389 cm^-1;Δν(EuL₂(TPPO)₂NO₃)=402 cm^-1)值均大于钠盐的Δν (379 cm^-1)值，配合物中羧酸根以单齿方式配位;配合物中苯乙酮酸的α-酮基参与配位，其红外吸收峰移向低波数。在¹H NMR中，苯乙酮酸苯环上５个氢原子的化学位移在形成配合物后移向高场。室温下测定了配合物的荧光激发光谱和发射光谱。激发光谱表明配合物Eu-L，EuL₃phen和EuL₂(TPPO)₂NO₃最佳激发波长分别为374.0，358.2和383.4 nm。发射光谱显示Eu³⁺离子的特征发射光谱。分别是⁵D₀—⁷F₀，⁵D₀—⁷F₁，⁵D₀—⁷F₂，⁵D₀—⁷F₃，⁵D₀—⁷F₄跃迁(Eu-L：577.8，590.2，614.0，648.4，695.4 nm;EuL₃phen：578.0，588.4，591.6，611.2，617.0，649.4，687.6，698.6 nm;EuL₂(TPPO)₂NO₃：577.8，590.4，614.6，649.2，697.6 nm)。荧光光谱表明TPPO对Eu³⁺离子的荧光发射有明显增强作用。

关键词：铕;苯乙酮酸;配合物;红外光谱;荧光光谱

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

收稿日期: 2005-01-08 修订日期: 2005-04-28

中图分类号:

O614.3

通讯作者: 孙波

引用本文:

张彦辉¹，孙波^1*，阎晓琦¹，裴娟¹，耿啸天¹，赵莹²，王云友³，颜剑波³ . 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[J]. 光谱学与光谱分析, 2005, 25(12): 2034-2038.
ZHANG Yan-hui¹,SUN Bo^1*,YAN Xiao-qi¹,PEI Juan¹,GENG Xiao-tian¹,ZHAO Ying²,WANG Yun-you³,YAN Jian-bo³ . Synthesis, Structure Characterization and, Fluorescence Studies of the Complexes of Europium with Phenylglyoxylic Acid, 1,10-Phenanthroline and Triphenyl Phosphine Oxide . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(12): 2034-2038.

链接本文:

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

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