Calix[4]arenes with a novel proton-ionizable group: synthesis and metal ion separations
- 1 January 1998
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 3,p. 419-420
- https://doi.org/10.1039/a708150b
Abstract
New calix[4]arenes with two N-(X)sulfonyl carboxamide groups of ‘tunable’ acidity are synthesized from the corresponding calixarene dicarboxylic acid and exhibit good to excellent extraction selectivity for Pb2+ over most alkali, alkaline earth and transition metal ions.Keywords
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