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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△v(vas(CO2-)-vs(CO2-))(△v(Eu-L) =391 cm-1;△v(EuL3phen)=389 cm-1;△v(EuL2(TPPO)2NO3)=402 cm-1)值均大于钠盐的△v(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a-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-F4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。
Three new solid-state complexes Eu-L, EuL3phen and EuL2 (TPPO) 2NO3 were synthesized from europium nitrate, HL, 1,10-phenanthroline and TPPO. The complex was characterized by elemental analysis, conductivity, IR and NMR. The composition of the ternary complex was determined. The results of IR showed that the v v (v (subscript v) - vs (CO2 -)) (△ v (Eu-L) = 391 cm- cm-1; △ v (EuL2 (TPPO) 2NO3) = 402 cm-1 were all higher than △ v (379 cm-1) Acetophenone acid a-keto-coordinated, the infrared absorption peak shifted to low wave number. In 1H NMR, the chemical shifts of the five hydrogen atoms on the benzene ring of phenyl acetonate shifted to high field after forming the complex. The fluorescence excitation spectra and emission spectra of the complexes were determined at room temperature. The excitation spectra showed that the best excitation wavelengths of Eu-L, EuL3phen and EuL2 (TPPO) 2NO3 were 374.0, 358.2 and 383.4 nm, respectively. Emission spectra show the characteristic emission spectra of Eu3 + ions. 5D0-7F1, 5D0-7F2, 5D0-7F3, 5D0-F4 transitions (Eu-L: 577.8, 590.2, 614.0, 648.4, 695.4 nm; EuL3phen: 578.0, 588.4, 591 respectively. 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). Fluorescence spectra showed that TPPO enhanced the fluorescence emission of Eu3 + ions significantly.