Optical Properties of Ho(NO₃)₃ 6H₂O: Organic Acid Complexes

Abstract

Optical absorption studies have been carried out from the UV to NIR for Ho³⁺ ions (0.1 M%) mixed organic acids namely anthrolinic, benzoic, salicylic and pthalic acids. Spectral intensities of various observed bands of Ho³⁺ have neen affected very significantly depending upon the surrounding environment. We made a correlation between the intensity parameters and the spectral intensities quite clearly by the application of Judd-Ofelt theory. Of the various levels recorded, particularly the energy level ⁵G₆ ← ⁵I₈ has shown a distinctive phenomenon in its intensity magnitudes as a function of the host. We have also examined the bonding nature of the complexes, as ionic for Ho³⁺ in four different fluorescing organic acids.

Key Words:

• Spectral intensities
• complexes bonding nature