کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1339146 979694 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
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-ra
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
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-ra
چکیده انگلیسی

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)calix[4]arene, (S) in CHCl3 has been studied. It was found that in presence of this phosphorus-containing calix[4]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.Elemental analysis, IR, 1H NMR, 19F NMR spectra and X-ray have shown that the complex of Eu(III) with HL is eight coordinated and its composition can be represented with the formula [EuL2(C2H5OH)4]Cl as well as that the coordination polyhedron is distorted square antiprism. The stoichiometry ([EuL2S]Cl) and the structure of the solid complex of Eu(III) with HL and S were proposed using elemental analysis, IR, 1H NMR, 19F NMR and 31P NMR data.

The synergistic solvent extraction of five selected lanthanoid ions 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)calix[4]arene, (S) in CHCl3 has been studied. The solvent extraction data showed that the composition of the mixed complex is [LnL3S2], while the composition of the synthesized solid complex is [EuL2S]Cl. On the basis of the X-ray data, the structure of the Eu(III) complex with HL was determined.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 27, Issue 15, 17 October 2008, Pages 3306–3312
نویسندگان
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