TY  - JOUR
AU  - Zarzana, Christopher A.
AU  - McAlpine, Jack
AU  - Wilden, Andreas
AU  - Hupert, Michelle
AU  - Stärk, Andrea
AU  - Iqbal, Mudassir
AU  - Verboom, Willem
AU  - Mincher, Bruce J.
AU  - Groenewold, Gary S.
AU  - Modolo, Giuseppe
TI  - Gamma Radiolysis of Phenyl-Substituted TODGAs: Part I
JO  - Solvent extraction and ion exchange
VL  - 41
IS  - 5
SN  - 0736-6299
CY  - Philadelphia, PA
PB  - Taylor & Francis
M1  - FZJ-2023-02569
SP  - 564-581
PY  - 2023
AB  - The radiolytic stabilities of three phenylated analogs of N,N,N',N'-tetraoctyl diglycolamide (TODGA) were investigated: 2-(2-(di-n-octylamino)-2-oxoethoxy)-N,N-di-n-octyl-2-phenylacetamide (PhTODGA), which has a phenyl substituent bound to a central methylene, 2-(2-(di-n-octylamino)-2-oxo-1-phenylethoxy)-N,N-di-n-octylpropanamide (PhMeTODGA), which also contains a methyl substituent bound to the methylene on the other side of the ether moiety, and, 2-(2-N-n-hexyl-N-phenylamino)-2-oxoethoxy)-N-n-hexyl-N-phenylacetamide (DHDPDGA), which has phenyl substituents located on the amide groups instead of the central methylenes. The objective of Part I of this series of papers covers was to evaluate the contribution of the phenyl group to the radiolytic stability of these diglycolamides when irradiated in a) n-dodecane, and b) n-dodecane in the presence of a nitric acid-containing aqueous phase. The results indicate that the presence of the phenyl group decreases the overall radiolytic stability compared to unsubstituted TODGA. However, the results also indicate that the phenyl groups interact with nitric acid in a cooperative fashion that enhances the radiation stability of the phenylated diglycolamide (DGA) derivatives in the presence of a nitric acid-containing aqueous phase compared to irradiation in only n-dodecane. The results are consistent with the hypothesized formation of nitric acid-phenylated DGA complexes in the n-dodecane phase that are significantly more stable with respect to gamma irradiation, compared to the phenylated DGA molecules alone.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001023482500001
DO  - DOI:10.1080/07366299.2023.2220765
UR  - https://juser.fz-juelich.de/record/1009000
ER  -