镧系-柠檬酸-乙酰丙酮系统中的超灵敏跃迁和络合作用

在正常状态下镧系(Ln~(3+))4f壳层电子的跃迁是被禁止的。但是在配位场的作用下f-f跃迁则会发生,这将导致镧系水合离子光谱中狭窄的光吸收率强度相应的增大。此种现象称之为超灵敏跃迁(Hypersensitive transition)。溶液中镧系离子超灵敏跃迁的研究在阐明镧系配位

HYPERSENSITIVE TRANSITION AND COMPLEX FORMATION IN THE SYSTEM OF LANTHANIDES (Nd~(3+), Ho~(3+), Er~(3+)). CITRIC ACID.ACETYLACETONE

The complex formation of lanthanides (Nd~(3+),Ho~(3+) and Er~(3+))-citrie acid (H_3 Cit)- acetylacetone (HA) has been studied by spectrophotometry. It was found that the lanthani- des combine with H_3Cit and HA at the ratio 1:1:1. From this datum obtained, the oscillator strength P of Ln~(3+) in solutions of both binary and ternary compounds has been calculated and the ralated general rule, that the oscillator strength P follows formulated.