Thiophosphorylated cavitand: structure and affinity towards soft metal ions |
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| Authors: | Brigitte BibalJean-Paul Declercq Jean-Pierre Dutasta Bernard TinantAnne-Gaëlle Valade |
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| Institution: | a École Normale Supérieure de Lyon, Stéréochimie et Interactions Moléculaires, UMR CNRS no. 5532, 46, Allée d'Italie, F-69364 Lyon 07, France
b Université Catholique de Louvain, Unité de Chimie Structurale et des Mécanismes Réactionnels, 1 Place Louis Pasteur, B-1348 Louvain-la-Neuve, Belgium |
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| Abstract: | The iiii stereoisomer of the tetrathiophosphonate-calix4]resorcinarene host 1 exhibited excellent extraction properties towards soft metal ions, with a better affinity for Ag+ (91%), than for Tl+ (38%) and Hg2+ (16%). The extraction of other picrate salts (Cu2+, Ni2+, Co2+, Zn2+, Cd2+, Pb2+) was not detected. The stoichiometry and the structure of the Hg2+, Tl+ and Ag+ complexes were studied by NMR in solution and gave respectively 1:1, 1:1 and 1:2 host-guest complexes. The formation of the self-assembled 12·(AgPic)4 complex was independent on the anion and only observed with silver(I) ion. |
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| Keywords: | cavitand thiophosphorylated ligand complexation supramolecular chemistry X-ray structure |
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