Preorganization of diglycolamides on the calix(4)arene platform and its effect on the extraction of Am(III)/Eu(III)

M. Iqbal, P.K. Mohapatra, S.A. Ansari, Jurriaan Huskens, Willem Verboom

Research output: Contribution to journalArticleAcademicpeer-review

63 Citations (Scopus)

Abstract

Different diglycolamide (DGA)-substituted calix[4]arene-based extractants were synthesized and evaluated for the extraction of Am(III) and Eu(III), representative trivalent actinide and lanthanide ions, respectively. On the narrow rim of the calix[4]arene platform, the DGA moiety was either 1,3-di- or tetrasubstituted with a varying spacer length between the oxygen and amide nitrogen atom. In addition, DGA groups were appended both to the wide rim and to both rims of calix[4]arenes and their efficiencies were compared for Am(III) and Eu(III) extraction at three different feed acidities. The extraction and separation efficiencies strongly depended on the N-alkyl substituent as well as the spacer length. 1,3-Di-DGA-substituted calix[4]arenes are inferior extractants to the corresponding tetra-DGA-substituted ones. Narrow rim DGA-functionalized derivatives resulted in high extraction efficiencies, while the wide rim DGA-functionalized calix[4]arenes showed practically no extraction
Original languageEnglish
Pages (from-to)7840-7847
Number of pages7
JournalTetrahedron
Volume68
Issue number38
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-293807
  • IR-85052

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