人所共知的是在正常状态下镧系(Ln~(3+))4-f 壳层电子的跃迁是被禁止的。但在配位场的作用下 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峰强度相应的增大。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体的结构和提高吸收—分光光度法测定镧系的灵敏度方面 It is well known that the transition of lanthanide (Ln ~ (3 +)) 4-f shell electrons is prohibited under normal conditions. However, the f-f transition will occur under the coordination field and this will result in a corresponding increase in the narrow light absorption peak intensity in the Lanthanide hydrated ion spectrum. This phenomenon is called “hypersensitive” transitions (“Hypersensitive” transitions). Studies on the Supersensitive Transitions of Lanthanide Ions in Solutions In elucidating the structure of the lanthanide ligands and increasing the sensitivity of the absorption-spectrophotometry for the determination of lanthanides