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Issue 2, 2011
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A new calix[4]arene derivative and its ionic recognition for silver(i) and mercury(ii): the solvent effect

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Abstract

A new lower rim partially functionalized calix[4]arene, namely, 5,11,17,23-tetra-tert-butyl[25,27-bis(diethylthiocarbamoyl)oxy]calix[4]arene, 1 was synthesized and characterized by 1H NMR in different deuterated solvents to assess the degree of solventligand interactions and the conformation of 1 in solution. 1H NMR, conductometric and thermodynamic investigations reveal that this receptor interacts only with silver(I) and mercury(II) in dipolar aprotic media. The complexation process has been thermodynamically characterized and the results are compared with the corresponding data (when available) involving analogous ligands and these metal cations in the appropriate solvent. Emphasis is made on the difference between ‘selective extraction’ and ‘selective ionic recognition’ by receptors. Final conclusions are given.

Graphical abstract: A new calix[4]arene derivative and its ionic recognition for silver(i) and mercury(ii): the solvent effect

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Submitted
23 Jul 2010
Accepted
01 Nov 2010
First published
06 Dec 2010

New J. Chem., 2011,35, 375-384
Article type
Paper

A new calix[4]arene derivative and its ionic recognition for silver(I) and mercury(II): the solvent effect

A. F. Danil de Namor and T. S. Pawłowski, New J. Chem., 2011, 35, 375
DOI: 10.1039/C0NJ00580K

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