Coordination chemistry of a para-tert-octylcalix[4]arene fitted with phosphinoyl pendant arms towards 4f-elements: Extraction,synergism, separation |
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| Authors: | Maria Atanassova Nikolay Vassilev Emil Tashev Victoria Lachkova Sabi Varbanov |
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| Affiliation: | 1. University of Chemical Technology and Metallurgy, Department of General and Inorganic Chemistry, Sofia, Bulgaria;2. University of Grenoble Alpes, France;3. CNRS, LEPMI, UMR 5279, Grenoble, Francema@uctm.edu;5. Institute of Organic Chemistry with Center of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria;6. Insitute of Polymers, Bulgarian Academy of Sciences, Sofia, Bulgaria;7. Department of Ecology, Forestry University, Sofia, Bulgaria |
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| Abstract: | The solvent extraction of trivalent lanthanoids (Ln3+) by 5,11,17,23-tetra(para-tert-octyl)-25,26,27,28-tetrakis(dimethylphosphinoylmethoxy)calix4]arene (S), bearing four phosphine oxide donor groups at the lower rim as synergistic agent in combination with a 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP) in CHCl3 from chloride medium at µ = 0.1 was quantitatively described in the form of LnP3·S complexes. The role of the synergistic agent on the extraction process was discussed. The values of the separation factors have been evaluated. On the basis of the IR and NMR spectra the stoichiometry and the structure of the solid mixed complex of Eu(III) with HP and S were proposed. |
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| Keywords: | Phosphorus-containing para-tert-octylcalix[4]arene synergism lanthanoids separation 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one |
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