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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 18, Number 9
BKCSDE 18(9)
September 20, 1997

Title	Complexation and Conformational Flexibility of Calix[4]arene Dibenzocrown Ethers
Author	Jong Seung Kim*, Akira Ohki, Moon Hwan Cho, Jong Kuk Kim, Do Young Ra, Nam Sook Cho, Richard A. Bartsch, Kune Woo Lee, Won-Zin Oh
Keywords
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.
Page	1014 - 1017
Full Text	PDF

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