Lanthanide structures, coordination, and extraction investigations of a 1,3-bis(diethyl amide)-substituted caliz[4]arene ligand
- Univ. of Oxford (United Kingdom)
- Univ. of Reading (United Kingdom); and others
The synthesis and structure determinations of lanthanum, samarium, ytterbium, and lutetium complexes of 5,11,17,23-tetra-tert-butyl-25,27-bis((diethylcarbamoyl)methoxy)-26,28-dihydroxycalix[4]arene (L) are described. The four structures display similar characteristics with the trivalent lanthanide cation being encapsulated in an eight-coordinate oxygen environment, consisting of six oxygens from the calixarene, a water molecule, and unidentate picrate for lanthanum [La(L-2H)(picrate)(H{sub 2}O)]; and bidentate chelating picrate for the other lanthanides [Ln(L-2H)(picrate)]Ln = Sm, Yb, Lu. Under optimised experimental conditions solvent extraction investigations showed the calix[4]arene ligand L exhibited generally very high percentage extractabilities of lanthanide cations into dichloromethane, presumably on account of the ligand`s unique lower rim oxygen containing coordination sphere and its lipophilic exterior.
- OSTI ID:
- 379143
- Journal Information:
- Inorganic Chemistry, Vol. 35, Issue 8; Other Information: PBD: 10 Apr 1996
- Country of Publication:
- United States
- Language:
- English
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