Water-soluble para-Sulfonated 1,2;3,4-Calix[4]arene-biscrowns in the 1,2-Alternate Conformation |
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| Authors: | Alexandre Mathieu Zouhair Asfari Pierre Thuéry Martine Nierlich Sylvain Faure Jacques Vicens |
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| Institution: | (1) ECPM, Laboratoire de Chimie des Interactions Moléculaires Spécifiques (CNRS UMR 7512), 25, rue Becquerel, F-67080 Strasbourg, France;(2) CEA/Saclay (CNRS URA 331), Bât. 125, F-91191 Gif-sur-Yvette |
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| Abstract: | The preparation of a series of p-sulfonated 1,2;3,4-calix4]arene-biscrowns in the 1,2-alternate conformation is reported. These compounds are of two types:symmetrical
p-sulfonated 1,2;3,4-calix4]arene-biscrowns in which the two crown loops are the same and unsymmetrical
p-sulfonated1,2;3,4-calix4]arene-biscrowns in which the two crown loops are different. The X-ray structures of two synthetic intermediates are given. Preliminary complexation studies showed the ligands to present pronounced Cs+/Na+ selectivities. |
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| Keywords: | calixcrown ethers Cs+/Na+ selectivities 1H-NMR water-soluble macrocycles X-ray diffraction |
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