Environmental Effects on f–f Transitions. III. Spectral Intensities of Lanthanide Nitrate, Sulfate, and α-Picolinate Solutions

The environmental effects of nitrate, sulfate, and α‐picolinate anions on $\mathrm{f–f}$ transitions of lanthanide ions in aqueous solution were investigated. For the α‐picolinate complexes, LnP₃, it was possible to apply the Judd–Ofelt method to the evaluation of the spectral changes. The ${\mathfrak{J}}_{\lambda }$ parameters were larger than for the aquoion spectra with ${\mathfrak{J}}_2$ showing the largest change. Results are presented for trivalent Pr, Nd, Sm, Dy, Ho, Er, and Tm.