1974 Volume 3 Issue 9 Pages 989-992
In absorption spectra of heavier rare earth (Gd to Lu) chelates of Chlorophosphonazo III, the absorption bands extend from 700 to 800 nm with a maximum at approximately 745 nm. The intensity of these bands increases with an increase in the mole ratio of the metal to the reagent and in the atomic number. Also it depends upon the pH value and the elapsing time. The corresponding chelates of lighter rare earths (La to Eu) do not exhibit a similar maximum under the same conditions.
This article cannot obtain the latest cited-by information.