Contribution of nitric acid and alcohol to the radiolytic degradation of TODGA in Isopar-M
| Autor: | Yulia V. Serenko, Nikolay V. Yudin, Elena Belova, Alexander V. Ponomarev |
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| Rok vydání: | 2021 |
| Předmět: |
Health
Toxicology and Mutagenesis Radical Diglycolic acid Public Health Environmental and Occupational Health Alcohol 010403 inorganic & nuclear chemistry Photochemistry 01 natural sciences Pollution Decomposition 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry Nitric acid Radiolysis Alkoxy group Molecule Radiology Nuclear Medicine and imaging Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 328:1319-1328 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | Radiolytic transformations of TODGA (N,N,N',N'-tetra-n-octylamide of diglycolic acid) in Isopar-M significantly depend both on the addition of alcohol (n-nonanol or n-decanol) and on the saturation of the solution with 8 M HNO3. Fragmentation of TODGA molecules is the dominant radiolytic process. Compared to acid-free solution, radiolysis in the presence of HNO3 results in a much lower yield of N,N-dioctylacetamide formation, while 2-hydroxy-N,N-dioctylacetamide remains the main degradation product of TODGA. The acidification of the solution promotes a lower radiolytic degradation of TODGA, but expands the range of final radiolysis products, in particular, due to the participation of NO2 and NO radicals in radiation-induced reactions. Alcohol serves as a source of alkoxy radicals, which are highly reactive towards TODGA. In the presence of nitric acid, a significant portion of alkoxy radicals decay in reactions with NO2, NO, and acyl radicals and, thus, do not participate in the decomposition of TODGA. |
| Databáze: | OpenAIRE |
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