Photocatalytic oxidation by uranyl

Conference · Fri Dec 01 00:00:00 EST 1995

OSTI ID:126631

McCleskey, T M; Tumas, W; Burns, C J ^[1]

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1. Los Alamos National Lab., NM (United States)

The excited state of uranyl (UO{sub 2}{sup 2+}*) is a potent oxidant (E{sup 0}(UO{sub 2}{sup 2+}*/UO{sub 2}{sup +}) {approx} 2.5 V) which can be quenched by either electron transfer (ET) or H atom abstraction. We have investigated both types of quenching with a variety of organic substrates in water and acetone/water media. Excited-state reactions with alkenes proceed by ET to form cation radicals, while reactions with tertiary alkanes follow an H-atom abstraction pathway. In aqueous media uranyl photocatalytically decomposes tert-butyl peroxide in a manner analogous to Fenton-type chemistry.

• OSTI ID: 126631
• Report Number(s): CONF-950402-; TRN: 95:006086-0616
• Resource Relation: Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
URANIUM DIOXIDE
CHEMICAL REACTIONS
PEROXIDES
DECOMPOSITION
ALKENES
ELECTRON TRANSFER
OXIDATION
QUENCHING
RADICALS
PHOTOCHEMICAL OXIDANTS