A D2 symmetric tetraamide macrocycle based on 1,1′,4,4′-tetrahydro[3,3′(2H,2′H)-spirobiquinoline]-2,2′-dione: synthesis and selectivity for lithium over sodium and alkaline earth ions
作者:Heung-Jin Choi、Yeon Sil Park、Moon Goo Kim、Yang Jin Park、Nam Sik Yoon、Thomas W. Bell
DOI:10.1016/j.tet.2006.06.109
日期:2006.9
Macrocyclic ionophores d,l-3 and d,l-4 with four amide carbonyl ligands were synthesized and investigated in lithium ion-selective electrodes. In solvent PVC membranes, ion selectivity of d,l-3 and d,l-4 for lithium relative to sodium was observed as logKLi,Napot=−1.4 and −1.23, respectively. Spiromacrocycle d,l-3 and analogue dibenzospiromacrocycle d,l-4 have similar ion selectivity patterns for alkali