| Abstrakt: |
A series of bis (dioctylphosphinyl) alkanes (DOPO)2R, where R can be p-xylydyl and (CH2)n(n=2,3,4,5,8 and 10), has been applied as extractants for gallium (III) ions from aqueous solutions of hydrochloric acid. These bis-type ligands have been found to be superior to the monodentate ligands such as trioctylphosphine oxide (TOPO) and benzyl dioctylphosphine oxide (Bz)DOPO. The extractability of the bis-type ligands, (DOPO)2(CH2)n, depends on the methylene length (n) and decreases in the order of 5≃10>3≃4≃8>2. The complexation of the gallium (III) ion with phosphoryl groups of the ligand has been confirmed by UV, IR and NMR spectroscopy. |
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