Bifunctional phosphoric acid-phosphine oxide extractants: Synthesis and complexes with uranium-(IV) and -(VI) and iron(III)

Rina Arad-Yellin, Mendel Zangen, Hugo Gottlieb, Abraham Warshawsky

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A bifunctional extractant (HL) carrying phosphine oxide and phosphoric acid complexing centres has been synthesized by the cyclic enediol phosphate method, using a two-step reaction with dihexyl(hydroxymethyl)phosphine oxide and 2-ethylhexanol. The bifunctional complexant complexes both UIV and UVI. The complexation process, as shown by 31P n.m.r. spectroscopy, involves both the R3P=O and (R′O)2PO2H centres (R=C6H13, R′=C8H17). The compound HL exists as hydrogen-bonded associates in the organic (hexane) phase. Involvement of anions in the complex structures is evident for UVI(NO3-), UIV(Cl-, NO3-, or HPO42-), and Fe(Cl- or SCN-).

Original languageEnglish
Pages (from-to)2081-2088
Number of pages8
JournalJournal of the Chemical Society. Dalton Transactions
Issue number7
DOIs
StatePublished - 1990
Externally publishedYes

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