Aromatic polyaminocarboxylate ligands for energy transfer luminescence measurements of lanthanide ions in aqueous solutions.
Aromatic polyaminocarboxylate ligands for energy transfer luminescence measurements of lanthanide ions in aqueous solutions.
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用于水溶液中镧系离子能量转移发光测量的芳香族聚氨基羧酸盐配体。
DOI：
10.1016/0039-9140(94)80173-8
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发表时间：
1994
期刊：
影响因子：
6.1
通讯作者：
T. Yotsuyanagi
中科院分区：
文献类型：
--
作者：
H. Hoshino;S. Utsumi;T. Yotsuyanagi
首次提出了用于镧系元素螯合物在水溶液中的能量转移发光测量的候选配体。配体是：2[（2-氨基-5-甲基-苯氧基）甲基]-6-甲氧基-8-氨基喹啉-N，N，N′，N′-四乙酸酯（Quin 2）、1，2-双（2-氨基-苯氧基）乙烷-N，N，N′，N′-四乙酸酯（BAPTA）和1，2-双（2-氨基-5-氟-苯氧基）乙烷-N，N，N′，N′-四乙酸酯（F-BAPTA）。这些芳香族聚氨基羧酸的Ln-螯合物显示出敏化发射，这是由于有效的配体为中心的光吸收，并且看到有趣的选择性; BAPTA和F-BAPTA仅与Tb（III）和Dy（III）离子形成发光螯合物，而Sm（III）和Eu（III）离子的发射被Quin 2极大地敏化。即使在微碱性水溶液中，也可以获得足够的发射强度，而无需添加任何表面活性剂或有机溶剂。这些八齿配体是相当能够屏蔽中心的Ln离子周围的水分子淬灭。Tb（III）离子与BAPTA（em. 544 nm）的发光增强因子为1600，Eu（III）离子与Quin 2（em. 615 nm），分别是相对于它们的氯化物水溶液。
The promising ligand candidates for the energy transfer luminescence measurements of lanthanide (Ln) chelates on aqueous matrices are first proposed. The ligands are; 2[(2-amino-5-methyl-phenoxy)methyl]-6-methoxy-8-aminoquinoline-N,N,N′,N′-tetraacetate (Quin 2), 1,2-bis(2-amino-phenoxy)ethane-N,N,N′,N′-tetraacetate (BAPTA), and 1,2-bis(2-amino-5-fluoro-phenoxy)ethane-N,N,N′,N′-tetraacetate (F-BAPTA). The Ln-chelates of these aromatic polyaminocarboxylates show the sensitized emission which results from efficient ligand-centered light absorption, and the interesting selectivity is seen; BAPTA and F-BAPTA form the luminescent chelates only with Tb(III) and Dy(III) ions, whereas the emission from Sm(III) and Eu(III) ions is greatly sensitized with Quin 2. The sufficient emission intensity can be obtained even in slightly alkaline aqueous solutions without any addition of surfactants or organic solvents. These octadentate ligands are fairly capable of shielding central Ln ions from quenching by surrounding water molecules. The luminescence enhancement factors are 1600 for Tb(III) ion with BAPTA (em.544 nm) and 1380 for Eu(III) ion with Quin 2 (em. 615 nm), respectively, being relative to their aqueous chloride solutions.