Journal
TETRAHEDRON LETTERS
Volume 41, Issue 43, Pages 8221-8224Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(00)01457-X
Keywords
calixarenes; crown ethers; alkali metal cations; ligand design
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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. (C) 2000 Elsevier Science Ltd. All rights reserved.
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