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.
Original language | Undefined |
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Pages (from-to) | 71-82 |
Number of pages | 12 |
Journal | Supramolecular chemistry |
Volume | 5 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1995 |
Keywords
- METIS-106652
- IR-12415