CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Hydroxyl radical, sulfate radical and nitrate radical reactivity towards crown ethers in aqueous solutions
Wan, LK; Peng, J; Lin, MZ; Muroya, Y; Katsumura, Y; Fu, HY(付海英)
2012
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume81Issue:5
AbstractReaction rate constants of crown ethers (12-crown-4, 15-crown-5, 18-crown-6) and their analogs 1,4-dioxane (6C2) with some important oxidative radicals, hydroxyl radical ((OH)-O-center dot), sulfate radical (SO4 center dot-) and nitrate radical (NO3 center dot), were determined in various aqueous solutions by pulse radiolysis and laser photolysis techniques. The reaction rate constants for 6C2 and crown ethers with (OH)-O-center dot and SO4 center dot- increase with the number of hydrogen atoms in the ethers, indicating that the hydrogen-atom abstraction is a dominant reaction between crown ethers and these two radicals. The presence of cations in solution has negligible effect on the rate constants of crown ether towards (OH)-O-center dot and SO4 center dot- However, for the NO3 center dot, the rate constants are not proportional to the number of hydrogen atoms in ethers, and 12-crown-4 (12C4) is the most reactive compared with other crown ethers. Except 12C4 and 6C2, the cations in the aqueous solution affect the reactivities of 15-crown-5 (15C5) and 18-crown-6 (18C6). The cations with high binding stability for crown ether would improve the reactivity of 15C5. For the studied crown ethers, the reaction rate constants of these oxidative radicals have the order (OH)-O-center dot > SO4 center dot- > NO3 center dot. Furthermore, the formation of radicals after the reaction of crown ethers with sulfate radical could be observed in the range of 260-280 nm using laser photolysis and pulse radiolysis. This is the first report on the kinetic behavior of crown ethers with NO3 center dot, and it would be helpful for the understanding of stability of crown ethers in the processing of spent nuclear fuel. (C) 2012 Elsevier Ltd. All rights reserved.
Language英语
Funding Project应物所项目组
WOS IDWOS:000302456000007
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13187
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Wan, LK,Peng, J,Lin, MZ,et al. Hydroxyl radical, sulfate radical and nitrate radical reactivity towards crown ethers in aqueous solutions[J]. RADIATION PHYSICS AND CHEMISTRY,2012,81(5).
APA Wan, LK,Peng, J,Lin, MZ,Muroya, Y,Katsumura, Y,&Fu, HY.(2012).Hydroxyl radical, sulfate radical and nitrate radical reactivity towards crown ethers in aqueous solutions.RADIATION PHYSICS AND CHEMISTRY,81(5).
MLA Wan, LK,et al."Hydroxyl radical, sulfate radical and nitrate radical reactivity towards crown ethers in aqueous solutions".RADIATION PHYSICS AND CHEMISTRY 81.5(2012).
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