ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 6
JKCSEZ 36(6)
December 20, 1992 

Absorption spectra were observed for several Ho(Ⅲ)-ligand systems in aqueous solution under the changes of ligand concentration and temperature. The intensity change of hypersensitive band (5I8 → 5G6) was quite remarkable with temperature and concentration, and was interpreted as the change of coordination environments. The transition intensities observed in these spectra were analyzed in terms of the Judd-Ofelt intensity parameters, Ωλ (λ = 2, 4, 6), for 4f → 4f electric dipole transitions. The Ω2 parameter was the most sensitive to the temperature and concentration. Using the changes of Ω2, Cl- and NO3- ions were found to form inner sphere complexes in aqueous solution.