Transduction of selective recognition by preorganized ionophores, K+ selectivity of the different 1,3-diethoxycalix[4]arene crown ether conformers

Brzozka, Zbigniew and Lammerink, Ben and Reinhoudt, David N. and Ghidini, Eleonora and Ungaro, Rocco (1993) Transduction of selective recognition by preorganized ionophores, K+ selectivity of the different 1,3-diethoxycalix[4]arene crown ether conformers. Journal of the Chemical Society. Perkin transactions II, 1993 (6). pp. 1037-1040. ISSN 0300-9580

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Abstract:	Three different conformers of 1,3-diethoxy-p-tert-butylcalix[4]arene crown ethers have been used to study the effect of the ionophore preorganization on the potentiometric K+-selectivity. Selectivities were measured for chemically modified field effect transistors (CHEMFETs) and membrane ion-selective electrodes (ISEs) by two different methods. The ionophores show decreasing K+/Na+ selectivities in the order: partial cone > 1.3-alternate > cone. As a function of time the cone conformer maintained a constant selectivity whereas a continuous decrease of the selectivity values was observed for the other two conformers. This supports our prediction based on the association constants and our previous 1H NMR studies on conformational stability.
Item Type:	Article
Copyright:	© Royal Society of Chemistry 1993
Research Group:	Supramolecular Chemistry and Technology (SMCT)
Link to this item:	http://purl.utwente.nl/publications/12564
Official URL:	http://dx.doi.org/10.1039/P29930001037
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Metis ID: 106745