A novel CMPO-functionalized task specific ionic liquid: synthesis, extraction and spectroscopic investigations of actinide and lanthanide complexes

Abstract

A novel CMPO (carbamoylmethylphosphine oxide) based task specific ionic liquid (TSIL) with an NTf(2)(-) counter anion was synthesized and evaluated for actinide/lanthanide extraction from acidic feed solutions using several room temperature ionic liquids (RTILs). The extraction data were compared with those obtained with CMPO in the same set of RTILs and also in the molecular diluent, n-dodecane. The extracted species were analyzed by the conventional slope analysis method and the extraction followed an ion-exchange mechanism. The nature of bonding in the extracted complexes was investigated by various spectroscopic techniques such as FT-IR and UV-visible spectroscopy.

Diglycolamide-Based Solvent Systems in Room Temperature Ionic Liquids for Actinide Ion Extraction: A Review

“…and the results were particularly interesting due to the fact that very high D values were obtained for Am 3þ and Pu 4þ . This was in sharp contrast to a report on CMPO-functionalized TSIL (CMPO-TSIL) which extracted the actinide ions to a much lower extent as compared to comparable concentration of CMPO in an ionic liquid [52]. A malonamide-functionalized TSIL [53] also showed analogous behaviour to the DGA-TSIL though the enhancement in the D values in case of DGA-TSIL was to a much larger extent.…”

Probing of the local environment and calculation of J.O. parameters for Eu3+ CMPO functionalized pillararene complexes by time resolved fluorescence spectroscopy

“…Use of room temperature ionic liquid as solvent can also avoid the problem of third phase formation [31]. Reports are also available in the literature to demonstrate the high efficiency of even CMPO functionalized ionic liquid for extraction of actinides [32][33]. In our previous paper we have demonstrated the efficacy of DGA and phosphine oxides functionalized pillararene ligands in extraction of trivalent actinides and lanthanides as well as transition metals [34][35][36].…”

Using Crystal Structures of Ionic Compounds to Explore Complexation and Extraction of Rare Earth Elements in Ionic Liquids

“…A number of ILs, commonly called task-specific ILs, are designed to coordinate to and extract metal ions by incorporating known extractant moieties [26][27][28]. One such system contains dithiophosphoric acids, which have been long studied as extractants for transition metals from aqueous acids [29].…”