Hexa(1,1,3,3-tetramethyl-butyl)-hexakis(dimethylphosphinoyl-methoxy)-calix[6]arene: Synthesis, characterization and implementation as a synergistic agent in the solvent extraction of lanthanoids

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creativework.keywordsEuropium mixed complex, Lanthanoids, Liquid extraction, Phosphorus-containing-para-tert-octyl-calix[6]arene, Synergism
creativework.publisherElsevier Ltden
dc.contributor.authorVarbanov S.
dc.contributor.authorTashev E.
dc.contributor.authorVassilev N.
dc.contributor.authorAtanassova M.
dc.contributor.authorLachkova V.
dc.contributor.authorTosheva T.
dc.contributor.authorShenkov S.
dc.contributor.authorDukov I.
dc.date.accessioned2024-07-10T14:27:04Z
dc.date.accessioned2024-07-10T14:48:38Z
dc.date.available2024-07-10T14:27:04Z
dc.date.available2024-07-10T14:48:38Z
dc.date.issued2017-01-01
dc.description.abstractA new lower rim phosphorus-containing calix[6]arene with six dimethyl-methylene phosphine oxide groups, namely 5,11,17,23,29,35-hexa(1,1,3,3-tetramethyl-butyl)-37,38,39,40,41,42-hexakis-(dimethylphosphinoylmethyleneoxy)-calix[6]arene (S), has been synthesized and characterized. The structure of this calix[6]arene was identified and confirmed by elemental analysis, IR, 1H and 31P{H} NMR spectroscopy and ESI-mass-spectrometry. The 1H and 31P{H} NMR spectra indicate that at room temperature in DMSO-d6 and 1,1,2,2-tetrachloroethane-d2 solutions, S exists as a mixture of conformers. The synergistic solvent extraction of selected lanthanoid ions (La, Nd, Eu, Ho, Lu) with 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (HP) and S in chloroform has been studied. It was found that in the presence of S the lanthanoid ions have been extracted as LnP3·S species. A very large synergistic enhancement (up to 105) was established. The stoichiometry and the structure of the solid complex of Eu(III) with HP and S (1:3:1) were proposed based on elemental analysis, IR, 1H NMR and 31P NMR data.
dc.identifier.doi10.1016/j.poly.2017.06.013
dc.identifier.issn0277-5387
dc.identifier.scopusSCOPUS_ID:85021369490en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/433
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85021369490&origin=inward
dc.titleHexa(1,1,3,3-tetramethyl-butyl)-hexakis(dimethylphosphinoyl-methoxy)-calix[6]arene: Synthesis, characterization and implementation as a synergistic agent in the solvent extraction of lanthanoids
dc.typeArticle
oaire.citation.volume134
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