Water-soluble multi-cage super tetrahedral uranyl peroxide phosphate clusters

The Key Role of U28 in the Aqueous Self‐Assembly of Uranyl Peroxide Nanocages

“…The in situ kinetic investigation of the uranyl–peroxide clusters in aqueous LiOH solutions have been carried out using small‐angle X‐ray scattering (SAXS) and Raman spectroscopy to characterize the evolution of the dissolved species. SAXS is one of the best techniques to characterize the formation of metal–oxo clusters in solution . Moreover, the high electronic density of uranium provides superior contrast between clusters and the solvent, which promotes the relatively easy detection even in low concentrations.…”

Dynamic Phosphonic Bridges in Aqueous Uranyl Clusters

“…4 nm in size. [2] Varieties are stable and soluble across the entire pH range of natural waters. [3] These clusters are particularly relevant to environmental chemistry because H 2 O 2 forms during the dissociation of water by radiolysis in repositories for radioactive waste.…”

Processing used nuclear fuel with nanoscale control of uranium and ultrafiltration

“…Our initial discovery of the conditions under which uranyl peroxide polyhedra spontaneously self-assemble into nanoscale cage clusters led to an extensive synthetic effort that has resulted in more than 50 distinct uranium-based nanomaterials with well defined structures [11][12][13]. These clusters, containing as many as 124 uranyl polyhedra and with diameters in the range of 1.5 to 4.0 nm, form rapidly in aqueous solution, promote the dissolution of uranium-based solids, persist for many months, and are highly soluble [17][18][19]. The cages of these clusters are defined by uranyl ions that are bridged by peroxide groups, and in some cases by various other ligands including hydroxyl, phosphate, pyrophosphate, oxalate, nitrate, and phosphite.…”