排序方式: 共有35条查询结果,搜索用时 62 毫秒
1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1341–1342, July, 1994. 相似文献
2.
3.
Using the chemiluminescence oxidation of U(IV) and H2O2 with xenon trioxide as a model, it has been found that during the photolysis of solutions of UO2SO4 in sulfuric acid in the absence of any organic compounds, the accumulation of U(SO4)2 and H2O2 takes place as a result of the reaction of the primary products of the photoreduction of uranyl ion,i.e., UO2
+ and the OH radical.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 751–754, April, 1994.The work was financially supported by the Russian Foundation for Basic Research, Project 93-03-12291. 相似文献
4.
V. P. Kazakov S. V. Lotnik V. N. Korobeinikova V. M. Kalinina L. A. Khamidullina R. G. Bulgakov A. N. Petrov 《Russian Chemical Bulletin》1991,40(8):1720-1720
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, p. 1934, August, 1991. 相似文献
5.
The effect of solvent deuteration revealed as a difference in the shape of temperature dependence curves for the lifetime of uranyl ion in the electronically excited state () upon warming H2SO4 solutions in 2 and D2SO4 solutions in D2O frozen at 77 K was detected. The value of in the case of D2SO4 was shown to be shorter in the glassy solution than in the polycrystalline sample, whereas the reverse was observed in frozen H2SO4 solutions. This effect was explained by dissimilar occurrence of phase transitions in H2SO4 and D2SO4 solutions, as well as by a decrease in the probability of nonradiative deactivation of *(UO2+
2) adsorbed on the surface of the crystal hydrate D2SO4·4D2O as compared with that on the surface of the crystal hydrates H2SO4·4H2O and H2SO4·6.5H2O. 相似文献
6.
7.
8.
Autoacceleration is observed in the chemiluminescent radical chain oxidation of U(IV) with xenon trioxide in aqueous perchloric acid in a Teflon (not conventional glass) reactor. The decay of chemiluminescence accompanying the reaction between U(IV) and XeO3 in the case of excess oxidizer obeys a first-order kinetic equation only at low U(IV) concentrations of 10?5–10?6 mol/l. Autoacceleration takes place at comparatively high reactant concentrations, when the contribution from the heterogeneous loss of radicals on the reactor walls into chain termination is comparatively small and the role of degenerate chain branching reactions is significant. It is inferred that a critical phenomenon rare for liquid-phase radical chain processes takes place in U(IV) oxidation with xenon trioxide: a comparative small increase in the reactant concentrations causes this chemiluminescent redox process to pass from the quasi-steady-state regime to autoacceleration. 相似文献
9.
10.