Fluorescence of lanthanide(III) complexes in aqueous solutions the influence ofpHand solution composition

摘要

The fluorescence of lanthanide ions and of their complexes withEDTA,NTAandAAin aqueous solutions was investigated. It has been shown that the fluorescence band intensities of Sm(III), Eu(III), Gd(III), Tb(III) and Dy(III) complexes depend on thepHand the complexing agent concentration. Fluorescence measurements were used to characterise the lanthanide complexes formed and an attempt was made to interpret the results theoretically.