Correlation between the lowest triplet state energy level of the ligand and lanthanide(III) luminescence quantum yield
Correlation between the lowest triplet state energy level of the ligand and lanthanide(III) luminescence quantum yield
复制标题
DOI：
10.1016/s0022-2313(97)00113-0
复制
发表时间：
1997-09-01
影响因子：
3.6
通讯作者：
Kankare, J
中科院分区：
文献类型：
--
作者：
Latva, M;Takalo, H;Kankare, J
41个不同的Eu（III）和Tb（III）的螯合物，其合成的目的是开发新的标记化学和生物化学应用的发光特性进行了测量，在水溶液中，并在时间分辨免疫分析的标签的适用性进行了评价。尽管许多因素对发光量子产率的影响，一个明确的相关性，得到的配体和镧系元素（III）的发光量子产率的各自的螯合物的最低三重态能级的能量之间。同时观察到Eu（III）和Tb（III）离子通过其几个不同的D-5（J）接受能量，共振能级取决于配体的最低三重态能级的能量，当Tb（III）的D-5（4）能级之间的能量差增大时，由于激发态Tb（III）* 向配体的能量转移，Tb（III）的发光量子产率降低。配体的最低三重态能级小于1850 cm（-1）。
The luminescence properties of 41 different Eu(III) and Tb(III) chelates that were synthesized with the purpose of developing new markers for chemical and biochemical applications were measured in aqueous solution and their suitability for labels in time-resolved immunoassays were evaluated. In spite of the influence of numerous factors on the luminescence quantum yields, a clear correlation was obtained between the energies of the lowest triplet state levels of the ligands and lanthanide (III) luminescence quantum yields of the respective chelates. Simultaneously Eu(III) and Tb(III) ions were observed to accept energy by their several different D-5(J), resonance levels depending on the energy of the lowest triplet state level of the ligand, and the Tb(III) luminescence quantum yields were observed to decrease due to the energy back transfer from excited Tb(III)* to the ligand when the energy difference between the D-5(4) level of Tb(III) and the lowest triplet state energy level of the ligand is less than 1850 cm(-1).