Polysiloxane coupled crown ethers as carrier in supported liquid membranes

E.G. Reichwein-Buitenhuis, E.G. Reichwein-Buitenhuis, David Reinhoudt, Feike de Jong

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Polysiloxanes bearing benzocrown-5 moieties have been synthesized and used as carriers for K+ and Na+ in supported liquid membranes. Although their lipophilicity is so high that leaching from the membrane is completely suppressed, their transport efficiency and selectivity can no longer be explained by a simple 1:1 crown:cation model. A more extensive multi-site model was developed that also takes into account cooperative and repulsive effects between adjacent binding sites. The transport properties were markedly influenced by the formation of 2:1 crown:K+ complexes. No evidence was found for repulsive interactions.
Original languageUndefined
Pages (from-to)71-82
Number of pages12
JournalSupramolecular chemistry
Issue number1
Publication statusPublished - 1995


  • METIS-106652
  • IR-12415

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