Chemistry of uranium (V)

Pentavalent uranium chemistry—synthetic pursuit of a rare oxidation state

“…Electron paramagnetic resonance (EPR) spectroscopy was used to measure the products of the photo-and electrolytic reduction 10 of the complexes U V '02(LMCI0 4 h (L = dimethylformamide (DMF) (1), dimethylsulfoxide (DMSO) (2), triethylphosphate (TEP) (3)) and U V 'OiLMN0 3 )2 (L = DMF (4), DMSO (5), TEP (6). 25.…”

Extractive Electrospray Ionization Mass Spectrometry for Uranium Chemistry Studies

“…3). More importantly, negatively charged uranyl acetate (m/z 447) undergoes characteristic fragmentation in the gas phase to produce UO 3 − as the final product (Fig. 4), providing the fundamental chemistry for specific detection of uranyl acetate species in complex matrixes by EESI without sample pretreatment.…”

“…The chemistry of uranium has attracted increased attentions due to its fundamental importance in the fields of chemistry, physical, energy, environments, and biology, etc. [1][2][3] Substantial progress in uranium studies normally requires development of novel analytical tools.…”

Chemistry of uranium in nonaqueous solution

“…Salts of the U(V) complexes were crystallized from the solutions. Ryan (Selbin and Ortego, 1969) has also prepared salts of UI^ by condensing anhydrous liquid HI on the chloro salts and evaporating the mixture slowly and by reacting UO2CI4" salts with liquid HI, UF5 can be prepared from UF4 by stirring a suspension of high-surface area UF4 in anhydrous liquid HF at 25°C under 10 psig of fluorine (Asprey and Penneman, 1967), The oxidation to UF5 proceeds rather rapidly, but to UF^, fairly slowly. Compounds of MUF^, where M is cesium or rubidium, have been prepared by stirring a slurry of the alkali metal fluoride and UF4 in liquid HF with fluorine at 10 psig and 2 5°C, A number of other U(V) compounds including addition compounds and alkoxides have been separated from anhydrous liquid solvents.…”

“…Compounds of MUF^, where M is cesium or rubidium, have been prepared by stirring a slurry of the alkali metal fluoride and UF4 in liquid HF with fluorine at 10 psig and 2 5°C, A number of other U(V) compounds including addition compounds and alkoxides have been separated from anhydrous liquid solvents. Their preparation has been reviewed by Selbin and Ortego (1969),…”