Preferential Crystallization of Lanthanoid Tris(β-diketonates) with Bridged Bis(2-pyridylmethyl)amine Ligands toward Separation Application

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  • Yano Masafumi
    Faculty of Chemistry, Material and Bioengineering, Kansai University
  • Takemoto Hidehiro
    Faculty of Chemistry, Material and Bioengineering, Kansai University
  • Tatsumi Masakazu
    Faculty of Chemistry, Material and Bioengineering, Kansai University
  • Miyake Hiroyuki
    Department of Chemistry, Graduate School of Science, Osaka City University
  • Tsukube Hiroshi
    Department of Chemistry, Graduate School of Science, Osaka City University JST-CREST, Osaka City University

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A combination of two bridged bis(2-pyridylmethyl)amine-type ligands offered efficient separation of lanthanoid tris(β-diketonates) complexes. The employed ligands bridged two lanthanoid tris(β-diketonates) to form crystalline ternary complexes. Since the complexes containing larger lanthanoid centers were preferentially precipitated, the bridging ligands selectively recognized the lanthanoid tris(β-diketonates) in the crystallization process, and offered an efficient separation method.

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