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Extractive complexation of lanthanides and Am(III) by 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone in ionic liquid: Solvent extraction and spectroscopic studies.
- Source :
-
Inorganic Chemistry Communications . Nov2016, Vol. 73, p72-76. 5p. - Publication Year :
- 2016
-
Abstract
- Extraction behaviour of trivalent actinides and lanthanides was studied using solutions of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP), a beta-diketone, in a room temperature ionic liquid, 1-methyl-3-octyl-imidazolium bis(trifluoromethylsulphonyl) imide (C 8 mim·Tf 2 N). The complex extracted into C 8 mim·Tf 2 N differs in its composition than those observed in molecular diluents such as benzene. Whereas, neutral ML 3 complex is predominant in molecular diluents, a positively charged complex, [ML 2 ·HL] + (where M = La 3 + , Eu 3 + , Lu 3 + and Am 3 + ; L = PMBP − ; HL = HPMBP), was identified to be extracted into the ionic liquid medium. Luminescence spectroscopic studies suggested presence of four inner-sphere water molecules in the extracted species. This paper reports for the first time the stability constant of a lanthanide (Nd 3 + ) complex with HPMBP in C 8 mim·Tf 2 N which are significantly larger than those reported in molecular diluents. Thermodynamic parameters were also determined to throw light on the nature of complexation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13877003
- Volume :
- 73
- Database :
- Academic Search Index
- Journal :
- Inorganic Chemistry Communications
- Publication Type :
- Academic Journal
- Accession number :
- 119160233
- Full Text :
- https://doi.org/10.1016/j.inoche.2016.09.009