Effect of p-tert-butylcalix[4]arene fitted with phosphinoyl pendant arms as synergistic agent in the solvent extraction of trivalent lanthanoids with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione and structural study of solid complexes by IR,NMR and X-ray |
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| Authors: | Maria Atanassova Victoria Lachkova Nikolay Vassilev Boris Shivachev Sabi Varbanov Ivan Dukov |
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| Institution: | 1. University of Chemical Technology and Metallurgy, Department of General and Inorganic Chemistry, 8 Kliment Ohridski Boulevard, BG-1756 Sofia, Bulgaria;2. University of Forestry, Department of Ecology, 10 Kliment Ohridski Boulevard, BG-1756 Sofia, Bulgaria;3. Institute of Organic Chemistry, Bulgarian Academy of Sciences, Block 9, Acad. G. Bonchev Street, BG 1113 Sofia, Bulgaria;4. Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Block 107, Acad. G. Bonchev Street, BG 1113 Sofia, Bulgaria |
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| Abstract: | The synergistic solvent extraction of five selected lanthanoid ions (La3+, Nd3+, Eu3+, Ho3+ and Lu3+) with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione (HL) and 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis-(dimethylphosphinoylmethoxy)calix4]arene, (S) in CHCl3 has been studied. It was found that in presence of this phosphorus-containing calix4]arene the lanthanoid ions have been extracted as LnL3S2]. The values of the equilibrium constants and the separation factor have been calculated. The influence of the synergistic agent on the extraction process has been discussed. |
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| Keywords: | Synergistic solvent extraction Lanthanoids Phosphorus-containing calix[4]arene 4 4 4-Trifluoro-1-(2-thienyl)-1 3-butanedione Separation factors X-ray crystallographic data |
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