On the stoichiometry and stability of americium(III) complexes with a hydrophilic SO3–Ph–BTP ligand, studied by liquid–liquid extraction - Archive ouverte HAL Access content directly
Journal Articles Journal of Radioanalytical and Nuclear Chemistry Year : 2015

On the stoichiometry and stability of americium(III) complexes with a hydrophilic SO3–Ph–BTP ligand, studied by liquid–liquid extraction

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Abstract

1:1 and 1:2 complexes of americium(III) with a hydrophilic anionic SO3–Ph–BTP4− ligand were detected in acidic aqueous nitrate solutions by a solvent extraction method. The determined conditional stability constants of these complexes, logβ 1 = 4.35 ± 0.07 and logβ 2 = 7.67 ± 0.06, related to 1 M aqueous solutions, are much lower than the literature values for the analogous curium species, determined by TRLFS in very dilute aqueous solutions. There is also no evidence for the existence of the 1:3 Am3+ complex similar to the reported curium(III) complex. A hypothesis has been formulated to explain these discrepancies. It suggests the necessity to carefully check the equilibria in each phase of solvent extraction systems containing two competing ligands—lipophilic and hydrophilic.

Dates and versions

cea-02382462 , version 1 (27-11-2019)

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Cite

Łukasz Steczek, Magdalena Rejnis, Jerzy Narbutt, Marie-Christine Charbonnel, Philippe Moisy. On the stoichiometry and stability of americium(III) complexes with a hydrophilic SO3–Ph–BTP ligand, studied by liquid–liquid extraction. Journal of Radioanalytical and Nuclear Chemistry, 2015, ⟨10.1007/s10967-015-4663-7⟩. ⟨cea-02382462⟩

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