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
作者： Sabi Varbanov , Emil Tashev , Nikolay Vassilev , Maria Atanassova , Victoria Lachkova
DOI: 10.1016/J.POLY.2017.06.013
关键词:
摘要: Abstract A 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 was identified confirmed by elemental analysis, IR, 1H 31P{H} NMR spectroscopy ESI-mass-spectrometry. spectra indicate that at room temperature in DMSO-d6 1,1,2,2-tetrachloroethane-d2 solutions, S exists as a mixture conformers. synergistic solvent extraction selected lanthanoid ions (La, Nd, Eu, Ho, Lu) 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (HP) chloroform studied. It found the presence have extracted LnP3·S species. very large enhancement (up to 105) established. stoichiometry solid complex Eu(III) HP (1:3:1) were proposed based on 31P data.
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