Syntheses of phosphate diesters having p-tert-butylcalix[4]arene and alkyl group as ester moieties, and their selective lithium cation transport abilities through liquid membranes
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 22,p. 2137-2138
- https://doi.org/10.1039/a705000c
Abstract
Phospate diesters, 2a, 2b and 2c, having p-tert-butylcalix[4]arenes and alkyl groups as ester moieties exist as an equilibrium of cone and partial-cone conformations in solution and selectively transport Li+; however, the conformations of the calix[4]arene moieties in the Li and Na complexes of 2a as the methyl ester and/or 2b as the ethyl ester in solution are cone only, although that of the K complex exists as a mixture of cone and partial-cone conformers.Keywords
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