Complexation of trivalent lanthanides and actinides with several novel diglycolamide-functionalized calix[4]arenes: solvent extraction, luminescence and theoretical studies

Dhaval R. Raut, Prasanta K. Mohapatra, Seraj A. Ansari, Shrikant V. Godbole, M. Iqbal, Debashree Manna, Tapan K. Ghanty, Jurriaan Huskens, Willem Verboom

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)
41 Downloads (Pure)

Abstract

Several diglycolamide-functionalized calix[4]arenes (DGA–Calix) were evaluated for actinide extraction from acidic feeds. The ligands with four diglycolamide (DGA) pendent arms are significantly more effective extractants than those with two DGA pendent arms. The ligands have a preference for the extraction of Eu3+, a representative trivalent lanthanide ion, as compared to Am3+, a commonly encountered trivalent actinide ion. The role of organic diluents on the metal ion extraction was investigated and the results were compared with the widely studied DGA-based extractant TODGA (N,N,N′,N′-tetra-n-octyl diglycolamide). Time resolved laser fluorescence spectroscopy (TRLFS) studies showed a strong complexation with no inner-sphere water molecules in the Eu(III)–DGA–Calix complexes and the complex formation constants (log β) were calculated. Ab initio density functional calculations were carried out to explain the higher stability of the Eu-complex of the DGA–Calix ligand with four pendent arms as compared to the one with two pendent arms.
Original languageEnglish
Pages (from-to)9296-9303
Number of pages8
JournalRSC advances
Volume3
Issue number24
DOIs
Publication statusPublished - 2013

Keywords

  • METIS-301579
  • IR-90126

Fingerprint Dive into the research topics of 'Complexation of trivalent lanthanides and actinides with several novel diglycolamide-functionalized calix[4]arenes: solvent extraction, luminescence and theoretical studies'. Together they form a unique fingerprint.

  • Cite this