Uranyl-catalyzed chemiluminescent oxidation of U4+ dioxygen in aqueous solution of HClO4
- 1. RAN, Ufimskij Nauchnyj Tsentr, Inst. Organicheskoj Khimii, Ufa (Russian Federation)
Description
Chemiluminescence (CL) accompanying the reaction of U4+ with O2 in 0.0004-0.1 M HClO4 was studied. Based on the results of analysis of the radical-chain mechanism of the reaction between U4+ and O2 it was consulted that the most plausible elementary step of the formation of (UO22+)* is transfer of an electron from the UO2+ ion to the oxidant - .OH radical. It was found that the reaction rate, as well as the CL yield, increase substantially in the presence of uranyl in solution. The catalytic action of UO22+ was explained by the formation of the UO22+ · UO2+ complex, which reduces the rate of disproportionation of UO2+, which is an intermediate of the reaction and is involved in chain propagation, and by the regeneration of the active center, UO2+, in the reaction of UO22+ with U4+
Abstract (Russian)
Исследована хемилюминесценция (ХЛ), сопровождающая взаимодействие U4+ с О2 в 0.0004-0.1 M растворах HClO4. На основе анализа радикально-цепного механизма реакции U4+ с O2 сделан вывод, что наиболее вероятной элементарной стадией образования (UO22+)* является перенос электрона от иона UO2+ к окислителю - радикалу .OH. Обнаружено значительное ускорение реакции, а также увеличение выхода ХЛ в присутствии иона уранила в растворе. Каталитическое действие UO22+ объяснено образованием комплекса UO22+ · UO2+, снижающим скорость диспропорционироания UO2+ - промежуточного продукта, участвующего в развитии цепи, и регенерацией активности центра UO2+ в реакции UO22+ с U4+Additional details
Additional titles
- Original title (Russian)
- Катализ ионом уранила хемилуминесцентной реакции окисления У
Publishing Information
- Journal Title
- Izvestiya Akademii Nauk. Rossijskaya Akademiya Nauk. Seriya Khimicheskaya
- Journal Issue
- no.9
- Journal Page Range
- p. 1522-1528
- ISSN
- 1026-3500
- CODEN
- IASKEA
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 32017717
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- AQUEOUS SOLUTIONS; CATALYSIS; CHEMICAL REACTION KINETICS; CHEMILUMINESCENCE; CONCENTRATION RATIO; OXIDATION; OXYGEN; PERCHLORIC ACID; REACTION INTERMEDIATES; URANIUM COMPOUNDS; URANYL COMPOUNDS
- Descriptors DEC
- ACTINIDE COMPOUNDS; CHEMICAL REACTIONS; CHLORINE COMPOUNDS; DISPERSIONS; ELEMENTS; EMISSION; HALOGEN COMPOUNDS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; KINETICS; LUMINESCENCE; MIXTURES; NONMETALS; OXYGEN COMPOUNDS; PHOTON EMISSION; REACTION KINETICS; SOLUTIONS; URANIUM COMPOUNDS
Optional Information
- Notes
- 23 refs., 7 figs.