Abstract
The chemiluminescence (CL) kinetics in U(IV) oxidation by atmospheric oxygen in aqueous HClO4 has been investigated. The CL quantum yield (ηCL, E/(mol U(IV))) in this reaction is 1.4 × 10−8. The elementary event generating the CL emitter, which is the electronically excited uranyl ion *(UO22+), is electron transfer from the uranyl ion UO2+ to the oxidizer (·OH radical). The Ag+ ion quenches CL, and the Cu2+ ion enhances CL.
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