ION TRANSPORT ABILITY AND SELECTIVITY RELATING TO THE STRUCTURE OF SYNTHETIC IONOPHORES

Abstract
o-,m-,p-Substituted benzoic acids (1, 2, 3) with polyether chain bearing hydroxy group at the end and the methylether of 1 (4) were prepared. With active transport of Na+ and K+ by 1∼4, 1 and 4 exhibited K+-selectivity over Na+, while 2, and 3 had no transport ability. From the results of ion transport and 1H-NMR study, relationship between the structure and transport ability was discussed.