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The extraction of KF from aqueous media and transport through an organic membrane is extremely challenging owing to the high hydration energies of especially the F anions. A novel organotin-based ditopic host containing the PhFSnCHSnFPh-CH-moiety (selective for fluoride anion complexation) covalently linked to 19-crown-6 (selective for potassium cation complexation) is reported. It transports KF up to 5.5- and 2.5-times faster than the dual-host mixture composed of the bidentate Lewis acid PhFSnCHSnFPh and 18-crown-6 at low and high salt concentrations, respectively.
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| http://dx.doi.org/10.1039/c6cc09975k | DOI Listing |
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Liquid membrane transport of potassium fluoride by the organotin-based ditopic host PhFSnCHSnFPh-CH-[19]-crown-6.
Chem Commun (Camb)
February 2017
Lehrstuhl für Anorganische Chemie II, Technische Universität Dortmund, D-44221 Dortmund, Germany.
The extraction of KF from aqueous media and transport through an organic membrane is extremely challenging owing to the high hydration energies of especially the F anions. A novel organotin-based ditopic host containing the PhFSnCHSnFPh-CH-moiety (selective for fluoride anion complexation) covalently linked to 19-crown-6 (selective for potassium cation complexation) is reported. It transports KF up to 5.
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