Extraction of americium and europium by CMPO-substituted adamantylcalixarenes
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V. A. Babain
Summary
Eight p-adamantylcalix[4]arene derivatives, bearing four CMPO-like functions [(CH2)nNHC(O)CH2- P(O)Ph2] at the wide (4a,b, n = 0, 1) or narrow (5a–c and 6a–c, n = 2–4) rims were synthesized for the first time. Studies of the extraction of americium(III) and europium(III) from 3 M HNO3 solutions to organic phases (dichloromethane, m-nitro-trifluoromethylbenzene) showed: (i) The extraction ability for all the adamantylcalixarene ligands is much better than for their monomeric analogues –N-(1-adamantyl)-, N-(1-adamantylmethyl)- and N,N-(dibutyl)carbamoylmethyldiphenylphosphine oxides 7a, 7b, 8; (ii) The extraction percentage increases strongly with increasing length of the spacer for all types of ligands 4–6, and best extraction results were found for 4b (n = 1) and 5c (n = 4); (iii) The separation coefficient DAm/DEu for the investigated compounds did not exceed 2, which is close to the narrow rim CMPO calixarenes, studied earlier; (iv) Variation of the spacer length between CMPO groups attached to the 1,3- and 2,4-positions of the calixarene platform in 6 did not lead to appreciably improved extractants, neither with respect to the extraction abilities (D) nor to the selectivities (DAm/DEu).
© Oldenbourg Wissenschaftsverlag, München
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- Extraction of americium and europium by CMPO-substituted adamantylcalixarenes
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Articles in the same Issue
- Chemical procedure applied for the identification of Rf/Db produced in the 48Ca +243Am reaction
- Chemical speciation of Am, Cm and Eu with EDTA at high ionic strength: thermodynamics and laser fluorescence spectroscopy studies
- Complexation of Cm(III)/Eu(III) with silicates in basic solutions
- Extraction of americium and europium by CMPO-substituted adamantylcalixarenes
- Plutonium (IV) complexation with citric and alginic acids at low PuT concentrations
- Electrochemical and spectroelectrochemical behaviour of Np(VI) ions in nitric acid solutions
- Americium and curium deposition in Finland from the Chernobyl accident
- Determination of uranium concentration and burn-up of irradiated reactor fuel in contaminated areas in Belarus using uranium isotopic ratios in soil samples
