Ionselective Electrodes Based on Adamantylthiacalix[4]arenes for Alkali Cations Determination

摘要

The possibility of using three derivatives of p-R-thiacalix[4]arene: tetraethyl ester of p-(1-ada-mantyl)thiacalrx[4]arene acid (I) and asymmetric p-tert-buthylcahx[4]-p-R-fniacalix[4]arene "molecular tubes" [R = tert-Bu(II), 1-adamantyl(III)] as ionophores in PVC-membrane ISEs for the determination of Na~+, K~+ and Rb~+ ions was studied. It was found that an electrode based on thiacalix[4]arene (I) exhibited high selectivity toward Na~+ ions, and electrodes with (II) and (III) demonstrated a good potentiometric response of the Rb~+ ion; Rb~+ can be determined in the presence of excess amounts Na~+ and K~+.