吡啶二甲酸类配体-EDTA-铽三元配合物的荧光性能

对几种吡啶－２，６－二甲酸类配体与ＥＤＴＡ、铽的三元配合物在溶液中的荧光性能进行了研究，溶液ＰＨ值和溶剂效应对体系荧光的影响也分别进行了探讨。４－甲氧基吡啶－２，６－二甲酸和４－乙氧基吡啶－２，６－二甲酸等配体在这种三元体系中的敏化性能比常用的吡啶－２，６－二甲酸好，其中４－乙酰氨基吡啶－２，６－二甲酸特别优异。不论在二元配合物系还是在三元配合物体系中，均具有发光强度大、寿命长的特点。

Luminescence of Terbium Chelates with Substituted Pyridine-2, 6-Dicarboxylic Acid Derivatives by Synergistic Effect of EDTA

Some spectral properties and luminescence intensities of Tb 3 chelates of substituted pyridine 2,6 dicarboxylic acids and 4 phenyl pyridine 2,6 dicarboxylic acid analogues were measured in some solutions (H 2O and EtOH etc.) by synergistic effect of EDTA. The substitution at the aromatic ring has a significant effect upon the observed luminescence intensities, excitation wavelengths, and lifetime of the complexes. Moreover, the changes in the environment cause great variation in those properties of certain Tb 3 chelates. The results show that some of the chelates (4 acetaminopoxypyridine 2,6 dicarboxylic acid, 4 ethoxypyridine 2,6 dicarboxylic acid and 4 methoxypyridine 2,6 dicarboxylic acid etc.) have a stronger emission and longer lifetime at room temperature and may thus be used as perfectly sensitizers in fluorescence analysis.