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Unusually Kinetically Inert Monocationic Neptunyl Complex with a Fluorescein-Modified 1,10-Phenanthroline-2,9-dicarboxylate Ligand: Specific Separation and Detection in Gel Electrophoresis.
Yamagata, Kazuhito; Ouchi, Kazuki; Marumo, Kazuki; Tasaki-Handa, Yuiko; Haraga, Tomoko; Saito, Shingo.
Afiliación
  • Yamagata K; Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan.
  • Ouchi K; Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki319-1184, Japan.
  • Marumo K; Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan.
  • Tasaki-Handa Y; Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan.
  • Haraga T; Department of Decommissioning and Waste Management, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki319-1195, Japan.
  • Saito S; Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan.
Inorg Chem ; 62(2): 730-738, 2023 Jan 16.
Article en En | MEDLINE | ID: mdl-36602910
We found a singly charged Np(V)O2+ complex with unprecedented kinetic inertness in aqueous solution, one million times slower than the widely accepted fast kinetics of neptunyl complexes. An inert NpO2+ complex with a fluorescent 1,10-phenanthroline-2,9-dicarboxylate derivative was found by kinetic selection using polyacrylamide gel electrophoresis (PAGE) from a small chemical library. Autoreduction from Np(VI)O22+ to Np(V)O2+ via complexation was observed. A remarkably small spontaneous dissociation rate constant of 8 × 10-6 s-1 (half-life of 23 h) was determined using PAGE. Selective detection of Np(V)O2+ was achieved in PAGE with a detection limit of 68 pmol dm-3 (17 fg). This system was successfully applied to simulated radioactive waste samples. Our finding that electron-rich NpO2+ forms a uniquely inert complex with no strong electrostatic interaction reveals a new aspect of actinide chemistry for developing a novel separation system of real radioactive material samples.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Inorg Chem Año: 2023 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Diagnostic_studies Idioma: En Revista: Inorg Chem Año: 2023 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos