Radiation stability of dicyclohexano-18-crown-6 extractant at the different stages of strontium separation: a simulating study

Radiation stability of dicyclohexano-18-crown-6 extractant at the different stages of strontium separation: a simulating study Full article

Journal

Radiation Physics and Chemistry
ISSN: 1879-0895 , E-ISSN: 0969-806X

Output data

Year: 2027, Volume: 251, Article number : 114456, Pages count : DOI: 10.1016/j.radphyschem.2026.114456

Authors

Nesterov Sergey V. ¹ , Zakurdaeva Olga A. ¹ , Asachenko Andrey F. ² , Khrustalev Victor N. ^3,4 , Feldman Vladimir I. ⁵

Affiliations

1	Enikolopov Institute of Synthetic Polymer Materials of RAS, ul. Profsoyuznaya, 70, Moscow 117393, Russia
2	Topchiev Institute of Petrochemical Synthesis of RAS, Leninsky Prospect, 29, Moscow 119991, Russia
3	Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia
4	Zelinsky Institute of Organic Chemistry of RAS, Leninsky Prospect, 47, Moscow 119991, Russia
5	Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia

Dicyclohexano-substituted crown ethers are the key components of strontium-selective extractants designed for reprocessing spent nuclear fuel and high-level radioactive wastes. In the process of radioactive strontium (90Sr) extraction, the macrocyclic ligand is present in the organic phase in free and protonated forms, and as an adduct with a strontium salt. The specific features of the radiolysis and radiation stability of these forms were analyzed in the present study with the examples of the cis-syn-cis-dicyclohexano-18-crown-6 complexes with hydroxonium tetrafluoroborate (cis-syn-cis-DCH18C6⋅H3O⋅BF4) and strontium tetrafluoroborate (cis-syn-cis-DCH18C6⋅Sr(BF4)2) simulating the related macrocyclic components at the different stages of strontium extraction. The protonated DCH18C6 was revealed to be less radiation stable to the macrocycle cleavage as compared to free macrocycle and “strontium” complex due to high reactivity of the H3O+ to the radiation-induced electrons. Inclusion of Sr2+ cation into the macrocycle cavity caused an additional channel of macrocycle cleavage at the post-radiation stages of the cis-syn-cis-DCH18C6⋅Sr(BF4)2 radiolysis.

Nesterov S.V. , Zakurdaeva O.A. , Asachenko A.F. , Khrustalev V.N. , Feldman V.I.
Radiation stability of dicyclohexano-18-crown-6 extractant at the different stages of strontium separation: a simulating study
Radiation Physics and Chemistry. 2027. V.251. 114456 . DOI: 10.1016/j.radphyschem.2026.114456 Scopus OpenAlex

Submitted:	Apr 8, 2026
Published online:	Sep 8, 2026

≡ Scopus:	2-s2.0-105049566007
≡ OpenAlex:	W7208747455