A comparative electrochemical study of thorium(IV) and uranium(IV) acetylacetonates

Electrochemical investigation of tetravalent uranium β-diketones for active materials of all-uranium redox flow battery

“…The electrode reaction is therefore explained by the similar mechanisms as (1) to (4). In the case of U(acac)4 complex, the peak couple corresponding to the redox of the three-coordinated complex is not observed in the present study and also in the previous work 11). The presence of the pre-equilibrium requires further investigation in terms of the thermodynamic distribution of the complexes in the acetonitrile solutions.…”

Dinuclear uranium complexation and manipulation using robust tetraaryloxides

“…The U IV/III redox couple is known to range from −2.78 to −1.83 V versus ferrocene depending on the ligand environment. 1,22,23 The cyclic voltammetry data show that the complexes 1 R and 2 R have one wave in the negative potential region attributable to the single electron reduction of both metal centres at the same time, and confirming the absence of U IV -U IV electronic communication through the ligand in all cases. The potentials of the complexes are collated in Table 1 and suggest that the uranium(III) complexes should be chemically accessible from a reaction with common one-electron reductants such as group 1 metals.…”

Electrodeposition of uranium in dimethyl sulfoxide and its inhibition by acetylacetone as studied by EQCM

“…2(e)). According to the literature [8] the cathodic peak of the U(acac) 4 in THF or AN has been attributed to the reaction (2) as given by…”

“…Tetrabutylammonium perchlorate (TBAP) was purchased from Kanto Kagaku, Japan, and used without further purifications. Uranium(IV) dimethyl sulfoxide perchlorate, prepared according to the literature [12], was identified as U(dmso) 8 …”

“…acetonitrile (AN) [8]. In THF, UCl 4 shows the U(IV)/U(III) reactions being accompanied with transfers of chloride ions at −2.0, −2.5 and −2.7 V versus Ag/AgCl [9].…”