Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Complexation and Conformational Flexibility of Calix[4]arence Dibenzocrown Ethers

  • Published : 1997.09.20
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Abstract

1,3-Dipropyloxycalix[4]arene dibenzocrown ethers were synthesized in the fixed 1,3-alternate conformation by the reaction of 1,3-dipropyloxycalix[4]arenes with a dibenzo dimesylates. Complexation toward alkali metal ions using ISEs showed a high cesium selectivity. Conformational flexibility of the corresponding 1,3-alternate calixcrown ether (4) with respect to the NMR time scale is found to depend on the temperature and polarity of the NMR solvent.

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