Optical Absorption Characteristics For 7 F 0 ' → 5 L 6 ' and 7 F 0 ' → 7 F 6 ' Transitions of Trivalent Americium Ion in Aqueous Electrolyte Mixtures

Abstract

Optical absorption features for $^{7} F_{0'} \to^{5} L_{6'}$ and $^{7} F_{0'} \to^{7} F_{6'}$ transitions of trivalent americium ion were investigated in a wide range of aqueous combinations of perchloric and nitric acids (0.1–6.0 mol L⁻¹). The developed qualitative matrix of extinction coefficients measures the cumulative impact of increasing electrolyte content, changes in the hydration zones of americium ion, and inner-sphere perturbation by nitrate on the absorbance. The effects of growing complexity of aqueous electrolyte medium were highlighted for the $^{7} F_{0'} \to^{5} L_{6'}$ transition. Spectroscopy indicates the perturbation of the inner hydration sphere of trivalent f-element by one nitrate ligand.

Keywords

Trivalent americium nitrate complexation inner and outer sphere complexes

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