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Selective recognition and extraction of the uranyl ion

Academic Article
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Overview

related to degree

  • Sather, Aaron, Ph.D. in Chemistry, Scripps Research 2008 - 2013

authors

  • Sather, Aaron
  • Berryman, O. B.
  • Rebek Jr., Julius

publication date

  • October 2010

journal

  • Journal of the American Chemical Society  Journal

abstract

  • A tripodal receptor capable of extracting uranyl ion from aqueous solutions has been developed. At a uranyl concentration of 400 ppm, the developed ligand extracts ?59% of the uranyl ion into the organic phase. The new receptor features three carboxylates that converge on the uranyl ion through bidentate interactions. Solution studies reveal slow exchange of the carboxylates on the NMR time scale. The crystal structure of the complex shows that the carboxylates coordinate to uranyl ion while the amides hydrogen bond to one of the uranyl oxo-oxygen atoms. The hydrophobic coating of the ligand and its rigidity contribute to its ability to selectively extract uranyl ion from dilute aqueous solutions.
  • A tripodal receptor capable of extracting uranyl ion from aqueous solutions has been developed. At a uranyl concentration of 400 ppm, the developed ligand extracts ∼59% of the uranyl ion into the organic phase. The new receptor features three carboxylates that converge on the uranyl ion through bidentate interactions. Solution studies reveal slow exchange of the carboxylates on the NMR time scale. The crystal structure of the complex shows that the carboxylates coordinate to uranyl ion while the amides hydrogen bond to one of the uranyl oxo-oxygen atoms. The hydrophobic coating of the ligand and its rigidity contribute to its ability to selectively extract uranyl ion from dilute aqueous solutions.

subject areas

  • Amides
  • Carboxylic Acids
  • Crystallography, X-Ray
  • Hydrogen Bonding
  • Ions
  • Ligands
  • Models, Molecular
  • Molecular Structure
  • Organometallic Compounds
  • Solutions
  • Uranium
  • Water
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Identity

International Standard Serial Number (ISSN)

  • 0002-7863

Digital Object Identifier (DOI)

  • 10.1021/ja1035607

PubMed ID

  • 20839791
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Additional Document Info

start page

  • 13572

end page

  • 13574

volume

  • 132

issue

  • 39

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