COMPLEXATION AND CONFORMATIONAL FLEXIBILITY OF CALIX[4]ARENE DIBENZOCROWN ETHERS

Authors
KIM JS OHKI A CHO MH KIM JK RA DY CHO NS BARTSCH RA LEE KW OH WZ
Citation
Js. Kim et al., COMPLEXATION AND CONFORMATIONAL FLEXIBILITY OF CALIX[4]ARENE DIBENZOCROWN ETHERS, Bulletin of the Korean Chemical Society, 18(9), 1997, pp. 1014-1017
Citations number
14
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Korean Chemical Society → ACNP
ISSN journal
02532964
Volume
18
Issue
9
Year of publication
1997
Pages
1014 - 1017
Database
ISI
SICI code
0253-2964(1997)18:9<1014:CACFOC>2.0.ZU;2-P
Abstract
1,3-Dipropyloxycalix[4]arene dibenzocrown ethers were synthesized in t he fixed 1,3-alternate conformation by the reaction of 1,3-dipropyloxy calix[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) w ith respect to the NMR time scale is found to depend on the temperatur e and polarity of the NMR solvent.