Infra-red studies on quaternary ammonium nitrates and their Th (IV) nitrate complexes in organic diluents

The Influence of the Complex Formation between Octanol and Long-Chain-Quaternary Ammonium Nitrates in o-Xylene and n-Dodecane on the Extraction of Pu (IV)

“…The Pu(IV) species that is extracted into the organic phase has a hexanitrato coordination, as is confirmed by spectroscopic measurements [6,[11][12][13]. Amine-type extracting agents and their metal complexes have a low solubility in hydrocarbon solvents.…”

The Chemistry of Solvent Extraction

“…The spectra of extracts suggest indeed that the organic phase species are predominantly MO^NC^6 08, 609 > or M IV (N0 3 ) 2 -/ 608,610 ' 611 > It is impossible to discriminate from their spectra between nitrate groups originating from the amine nitrate and those from the actinide (610) or lanthanide^6 07, 608 > nitrate.…”