Polysiloxane coupled crown ethers as carrier in supported liquid membranes

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Reichwein-Buitenhuis, E.G. and Reinhoudt, D.N. and Jong de, F. (1995) Polysiloxane coupled crown ethers as carrier in supported liquid membranes. Supramolecular Chemistry, 5 (1). pp. 71-82. ISSN 1061-0278

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Abstract: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.
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Copyright:© 1995 Taylor & Francis
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Link to this item:http://purl.utwente.nl/publications/12415
Official URL:http://dx.doi.org/10.1080/10610279508029889
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Metis ID: 106652