【摘要】 合成了铕-铽-钆-六氟乙酰丙酮(HFA)三元配合物Eu0.4Tb0.4Gd0.2(HFA)3(TPPO)2(TPPO:三苯基氧化磷),其组成和结构经元素分析和红外吸收光谱确认;研究了三元配合物的发光性能,以及铽、钆离子对铕离子发光性能的影响.结果表明,配合物中存在着声子支助的Tb3+→Eu3+的能量转移,增强了Eu3+离子的室温特征荧光发射,且样品的发光颜色随温度的改变而变化,具有温敏特性.更多还原

【Abstract】 Ternary lanthanide hexafluoroacetylacetonate complex with triphenylphoshine oxide,Eu₀.4Tb₀.4Gd₀.2（HFA）₃（TPPO）₂（HFA=hexafluoroacetylacetonate,TPPO=triphenylphoshine oxide）,was synthesized and identified by elemental analysis and FTIR.The photoluminescence（PL） spectra were measured and the characteristic transitions of Eu³+ and Tb³+ were observed.Temperature dependent PL properties of the ternary complex were also studied as well as the influences of Tb³+ and Gd³+ ions on PL properties of Eu³+ ions.As a result,the phonon assisted energy transfer from Tb³+ ions to Eu³+ ions,which enhanced the characteristic fluorescence intensity of Eu³+ ions at room temperature,was observed,and the sample exhibits different luminescent colors at different temperatures.The decay curves from the ⁵D₀ level of europium ions were measured at various temperatures and the lifetimes were obtained from fitting the data.It is seen that the lifetime decreases with increase in temperature.The complex is promising for being used as temperature detector and thermal-sensitive probe.更多还原