Extraction of minor actinides and lanthanides with novel soft-hard hybrid donor ligand, 2,9-diamides-1,10-phenanthroline

Ito, Sayumi*; Tsutsui, Nao  ; Nakase, Masahiko*; Matsumura, Tatsuro  ; Takeshita, Kenji*

We focused on 1,10-phenanthroline-2,9-diamides (PTDAs) for mutual separation of minor actinides (MAs) from lanthanides (Lns). PTDAs are hybrid-type ligands which consist of both soft N and hard O donors and show high extraction selectivity for MAs over Lns. They also have the symmetrical structures, and thus they are easy to synthesize. Furthermore, PTDAs have little detrimental effect on environment when they are incinerated. In this study, we synthesized novel PTDAs having phenyl groups and alkyl groups on the amide groups. The effectiveness of the novel PTDAs was evaluated from the viewpoint of extraction and separation properties of Lns and MAs.