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以Eu3+为中心离子,2-羟基喹啉-4-羧酸(H2hqc)、1,10-菲罗啉(Phen)和三苯基氧磷(TPPO)为配体,合成了新型配合Eu(Hhqc)3(H2O)、Eu(Hhqc)3Phen(H2O)5和Eu(Hhqc)3TPPO(H2O)5.用元素分析和红外光谱对配合物进行了表征,IR表明配合物Eu(Hhqc)3Phen(H2O)5的Δν值大于钠盐Δν值,配合物中羧酸根以单齿方式配位.而配合物Eu(Hhqc)3(H2O)和Eu(Hhqc)3TPPO(H2O)5Δν值均小于钠盐的Δν值,表明配合物中羧酸根与Eu3+呈螯合双齿配位方式.室温下测定了配合物的荧光光谱,研究了它们的荧光性能.结果表明,配合物均在581,594,615,654和703nm附近产生五条谱带,为Eu3+的特征发射,归属为5 D0→7 FJ(J=0,1,2,3,4)能级间的跃迁,第二配体Phen和TPPO的引入对Eu3+的荧光发射有明显增强作用,且Phen效果更好.
Eu (Hhqc) was synthesized with Eu3 + as the central ion, 2-hydroxyquinoline-4-carboxylic acid (H2hqc), 1,10-phenanthroline and triphenylphosphine oxide (TPPO) ) 3 Eu (Hhqc) 3Phen (H2O) 5 and Eu (Hhqc) 3TPPO (H2O) 5. The complexes were characterized by elemental analysis and FTIR spectroscopy. IR showed that the complex Eu (Hhqc) 3Phen ) 5 was larger than the Δν value of sodium salt, and the carboxylate in the complex was monodentate.While the 5Δν value of Eu (Hhqc) 3 (H2O) and Eu (Hhqc) 3TPPO (H2O) Δν value, indicating that the complex carboxylate with Eu3 chelate bidentate coordination mode.Fluorescence spectra of the complexes were measured at room temperature, their fluorescence properties were studied.The results show that the complexes are 581,594,615,654 and 703nm near the five The band, which is the characteristic emission of Eu3 +, is attributed to the transition between 5 D0 → 7 FJ (J = 0,1,2,3,4) energy levels. The introduction of the second ligand Phen and TPPO has the effect on the emission of Eu3 + Significantly enhance the effect, and Phen effect better.