A solution- and gas-phase study of uranyl hydroxamato complexes - Institut de Physique Nucléaire d'Orsay Accéder directement au contenu
Article Dans Une Revue Journal of Radioanalytical and Nuclear Chemistry Année : 2018

A solution- and gas-phase study of uranyl hydroxamato complexes

Résumé

This study compares the binding properties towards the uranyl cation of three hydroxamates derived from benzohydroxamic acid (BHAH), N-methylacetohydroxamic acid (NMAH) and 1-hydroxypiperidine-2-one (PIPOH), as models of the binding sites found in natural chelators that could be involved in the mobilization of uranyl in the vicinity of abandoned mines. Solution speciation studies of the UO22+/BHAH system by affinity capillary electrophoresis allowed to estimate stability constants for both ML [log K-110 = 7.4(1)] and ML2 [log K-120 = 7.0(1)] species in aqueous media [0.1 M (H,Na)ClO4, 25 degrees C], which lie in-between those reported by us elsewhere for NMA(-) and PIPO-. By contrast, gas phase studies demonstrate that one of the U=O bonds can be activated in the NMA(-) and PIPO- complexes, whereas this is not the case for the BHA(-) complex.
Fichier principal
Vignette du fichier
JRadioanalNuclChem_2018_HAL.pdf (678.75 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01998942 , version 1 (21-12-2021)

Identifiants

Citer

Vladimir Sladkov, Mingjian He, Pawel Jewula, Marie-José Penouilh, Stéphane Brandès, et al.. A solution- and gas-phase study of uranyl hydroxamato complexes. Journal of Radioanalytical and Nuclear Chemistry, 2018, 318 (1), pp.259-266. ⟨10.1007/s10967-018-6019-6⟩. ⟨hal-01998942⟩
44 Consultations
43 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More