Aqueous uranium complexes. 2. Raman spectroscopic study of the complex formation of the dioxouranium(VI) ion with a variety of inorganic and organic ligands

Elucidation of the collision induced dissociation pathways of water and alcohol coordinated complexes containing the uranyl cation

“…Work by Vachet and Callahan [14] has suggested that the nitrate anion, within gas-phase transition metal complexes, is primarily a bidentate ligand. The acceptance of three additional ligands by the uranyl-nitrate ion pair is consistent with a hypothesis that ESI produces a gasphase complex with a pentagonal bipyramidal conformation reminiscent of the structure of uranyl complexes in the solution phase [5][6][7][8][9][10][11]. The fact that the uranylhydroxide containing complex ion, as generated by ESI, also incorporated a maximum of 3 additional H 2 O ligands is therefore interesting.…”

“…The solution chemistry of uranium is dominated by the uranyl dication, UO 2 2ϩ , which is known to form complexes with a range of ligands [1]. Specific interaction with solvent will significantly influence the physico-chemical behavior of the uranyl ion and its complexes, and this has motivated investigations of complex composition and stability using infrared spectroscopy and extended X-ray absorption fine structure [5][6][7][8][9][10][11]. Unfortunately, explicit control over the interactions of solvent and nonsolvent ligands with the uranyl ion is difficult, which makes the study of species-dependent uranium behavior complicated.…”

In situ observations of liquid–liquid phase separation in aqueous ZnSO4 solutions at temperatures up to 400 °C: Implications for Zn2+–SO42− association and evolution of submarine hydrothermal fluids

“…As to the association between UO2 2+ and SO4 2-, Raman spectra of the v1(UO2 2+ ) band has been reported to be an effective indicator [13][14][15][16]; the coordination of UO2 2+ can increase the O=U=O length, causing the v1(UO2 2+ ) band shifts to lower wavenumber [13][14][17][18][19]. In fact, Raman spectra of the v1(SO4 2-) band can also be used to investigate the ion interaction between UO2 2+ and SO4 2-in aqueous solution because the complexation will influence the S-O vibrations of sulfate and cause a shift in the v1(SO4 2-) band, which has been well documented in aqueous MgSO4 solutions [20][21][22][23][24].…”

Ab initio Quantum Chemical Study on Charge Distribution and Molecular Structure of Uranyl (VI) Species with Raman Frequency

“…Then the investigation of uranyl species gives most basic information for other actinyl species investigation. Until now, so many experimental [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and theoretical approaches are performed for [UO 2 …”

“…In this work, these complexes are optimized the structures, and calculated some electronic and physical properties. After the calculated results were compared with experimental results, 1,5,[13][14][15][16] the relation between Raman frequencies and some properties are discussed, especially charge distributions, uranyl bond lengths, and coordination number.…”