钕(Ⅲ)和铒(Ⅲ)氨基酸配合物吸收光谱的超灵敏性

HYPERSENSITIVITY IN THE ABSORPTION SPECTRA OF Nd(Ⅲ)AND Er(Ⅲ)COMPLEXES WITH AMINO ACIDS

本文报道了Nd^(3+),Er^(3+)和谷氨酸、天冬氨酸、天冬酰胺体系的f-f跃迁吸收光谱。根据Judd-Ofelt方程计算了f-f跃迁的振子强度和参数T_λ(λ=2,4,6),讨论了溶液中pH值、配体浓度和碱度对镧系离子‘超灵敏”跃迁振子强度和T_λ参数的影响,讨论了‘超灵敏’跃迁振子强度和T_2的相关性及溶液中镧系离子与氨基酸形成的物种。

The absorption spectra of complexes of Nd^(3+), Er^(3+) with glutamic acid, aspartic acid and asparagine have been investigated. Oscillator strength of the 'hypersensitive' transition and Judd-Ofelt parameter T_λ were investigated for different ratios of Ln^(3+):Glu and different pH range. The existence of 1:1 and 1:2.75 species in pH 1～5 solutions was proved. Dependence of Oscillator strength of 'hypersensitive' transition and Judd-Ofelt parameter T_2 values upon acidic-basic properties of the ligand, correlation between Oscillator strength of the 'hypersensitive' transition and Judd-Ofelt parameter T_2 have been discussed.