【摘要】 合成并测定了6-甲基-2-吡啶羧酸氮氧化物（L¹）,氮,氮′-二（6-甲基-2-吡啶酰胺氮氧化物）-1,2-乙烷（L²）,氮,氮′-二（6-甲基-2-吡啶酰胺氮氧化物）-1,2丙烷（L³）三个配体的铕、铽配合的发射光谱和配体的三重态能级.结果发现,L¹,L²,和L³强烈的敏化Eu³⁺的发光,顺序为:L¹>>L²>L³,而敏化Tb³⁺的发光非常的弱.该事实表明,配体的最低三重态能级（T）和铽或铕的⁵D_j之间的差值△E完全符合了配体的对铕敏化而很不符合对铽敏化的条件.数据分析可知,对于Eu³⁺而言,当△E大于1000 cm^-1小于2000 cm^-1时,发射出稀土离子的特征荧光很强,越接近2000 cm^-1时特征荧光强度更强.对于Tb³⁺而言,当△E小于1500 cm^-1时,发射出稀土离子的特征荧光很弱,而接近1500 cm^-1时特征荧光强度几乎为零.更多还原

【Abstract】 The emission parameters for Tb³⁺ and Eu³⁺ complexes with 6-methyl-2-pyridine N-oxide（L¹）, N,N’-BIS（6-metyl-2-pyridinecarboxylamide-N-Oxide）-1,2-ethane（L²）,N,N’-BIS（6-metyl-2-pyridinecar-boxylamide -N-Oxide）-1,2-Propane（L³）and the excited triplet states were determined.It was found that L¹,L²,and L³ strongly sensitize Eu³⁺ luminescence,while the ligands sensitize Tb³⁺ luminescence very weakly.The intensity of the sensitized luminescence for Eu³⁺ increases in the following order:L¹>>L²>L³.It was explained by the relative energy gap between the lowest triplet energy level of the ligands （T） and ⁵D_J of Tb³⁺ or Eu³⁺ that the order of the luminescent intensity for Eu³⁺ complexes with the ligands and the ligands sensitize Tb³⁺ weakly.When 1000 cm^-1<△E（T—⁵D₁）<2000 cm^-1,the lumines- cent intensity of the Eu³⁺ complex is stronger.For Tb³⁺,when△E is less than 1500cm^-1,the emitted characteristic fluorescence is very weak,especially when△E is close to 1500 cm^-1,the emitted characteristic fluorescence is close to zero.更多还原