Network-like arrangement of mixed-valence uranium oxide nanoparticles after glutathione-induced reduction of uranium(vi). Issue 63 (30th May 2018)

• Record Type: Journal Article
• Authors: Kretzschmar, Jerome; Haubitz, Toni; Hübner, René; Weiss, Stephan; Husar, Richard; Brendler, Vinzenz; Stumpf, Thorsten
• Is Part Of: Chemical communications. Volume 54:Issue 63(2018)
• Page Start: 8697
• Page End: 8700
• Publication Date: 2018-05-30
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c8cc02070a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : 2–5 nm UO2+ x nanocrystals yielded under near-neutral conditions arrange as 20–40 nm chain-like building blocks, and finally form network-like aggregates. Abstract : Glutathione (GSH), a ubiquitous intracellular reducing tripeptide, is able to reduce hexavalent uranium, U(vi ), to its tetravalent form, U(iv ), in aqueous media in vitro, inducing the formation of nanocrystalline mixed-valence uranium oxide particles. After the initial reduction to U(v ) and subsequent dismutation, the yielded U(iv ) rapidly hydrolyses under near-neutral conditions forming 2–5 nm sized nanoparticles. The latter further aggregate to 20–40 nm chain-like building blocks that finally arrange as network-like structures.