Journal Article

FZJ-2023-02569

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Gamma Radiolysis of Phenyl-Substituted TODGAs: Part I

Zarzana, C. A. (Corresponding author) ; McAlpine, J. ; Wilden, A.FZJ* ; Hupert, M.FZJ* ; Stärk, A.FZJ* ; Iqbal, M. ; Verboom, W. ; Mincher, B. J. ; Groenewold, G. S. ; Modolo, G.FZJ*

2023
Taylor & Francis Philadelphia, PA

This record in other databases:    

Please use a persistent id in citations: doi:10.1080/07366299.2023.2220765  doi:10.34734/FZJ-2023-02569

Abstract: 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.

---

Contributing Institute(s):

1. Nukleare Entsorgung (IEK-6)
2. Analytik (ZEA-3)

Research Program(s):

1. 1412 - Predisposal (POF4-141) (POF4-141)
2. SACSESS - Safety of ACtinide Separation proceSSes (323282) (323282)
3. GENIORS - GEN IV Integrated Oxide fuels recycling strategies (755171) (755171)

Appears in the scientific report 2023

---

Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---