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New proton-ionizable, cesium-selective calix[4]arene-bis(crown-6-ethers) with markedly enhanced extraction efficiency

✍ Scribed by Vladimir S. Talanov; Galina G. Talanova; Richard A. Bartsch

Publisher: Elsevier Science
Year: 2000
Tongue: French
Weight: 68 KB
Volume: 41
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)01457-x

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✦ Synopsis

The first 1,3-alternate calix[4]arene-bis(crown-6-ethers) with a proton-ionizable group located in front of one crown ether cavity are synthesized. Compared with an analog that has no proton-ionizable group, the two new ligands possess markedly higher Cs + extraction efficiency.

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