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Soecific lanthanide separation based on minute ionic size recognition using O,N-hetero donor ligand

Kobayashi, Toru ; Suzuki, Shinichi; Shiwaku, Hideaki   ; Yaita, Tsuyoshi

The development of separation reagent, which can efficiently separate f-series element such as lanthanide and actinide, is of increasing importance because it concerns establishment of refinement and recycling technique of rare-metals and/or separation procedure in nuclear fuel cycle. Recently, we developed a novel O,N-hetero donor ligand PTA and found that this ligand shows selective coordination with specific trivalent-lanthanide or actinide. In addition, it is revealed that PTA forms two type of complex in structure bordering at recognized lanthanide or actinide. Thus, we investigated the ionic recognition mechanism of PTA based on detailed structural analysis, and proposed novel ionic separation method utilizing the boundary of structural change.

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