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合成一系列关于Eu(III)/Gd(III)与α-噻酚甲酰三氟丙酮(HTTA)、对甲氧基苯甲酸(POA)和邻菲罗啉(Phen)的配合物,并运用元素分析、红外光谱与扫描电镜对这些配合物进行表征。结果表明:这些配合物的组成为Eu1-xGdx(POA)(TTA)2Phen(x=0～1)。配合物Eu(POA)(TTA)2Phen的荧光激发光谱并不是配合物Eu(TTA)3Phen与Eu(POA)3Phen的荧光激发光谱的简单组合,配体TTA因化学环境不同,在配合物Eu(POA)(TTA)2Phen中的激发带比在配合物Eu(TTA)3Phen中的激发带发生明显的蓝移,这说明新的配合物已经生成。共发光Gd3+离子对配合物Eu1-xGdx(POA)(TTA)2Phen的荧光增强效果非常明显,掺杂配合物中Eu3+与Gd3+的物质的量的最佳比为3∶2。配合物Eu1-xGdx(POA)(TTA)2Phen的荧光增强机理主要是配合物分子间的能量传递。
A series of complexes of Eu (III) / Gd (III) and α-thiophenoxytrifluoroacetone (HTTA), p-methoxybenzoic acid (POA) and phenanthroline (Phen) These complexes were characterized by elemental analysis, infrared spectroscopy and scanning electron microscopy. The results show that the composition of these complexes is Eu1-xGdx (POA) (TTA) 2Phen (x = 0 ~ 1). The fluorescence excitation spectrum of the complex Eu (POA) 2Phen is not a simple combination of the fluorescence excitation spectra of the complexes Eu (TTA) 3Phen and Eu (POA) 3Phen. Due to the different chemical environment, POA) (TTA) 2Phen shows a significant blue shift compared with the excitation band in the complex Eu (TTA) 3Phen, indicating that a new complex has been formed. The fluorescence enhancement effect of the co-luminescent Gd3 + complex Eu1-xGdx (POA) (TTA) 2Phen is very obvious. The optimal ratio of Eu3 + to Gd3 + in the doped complexes is 3: 2. The fluorescence enhancement mechanism of complex Eu1-xGdx (POA) (TTA) 2Phen is mainly energy transfer between complexes.