Abstract
AbstractTwo novel 25,27‐dihydroxy‐26,28‐bis(3‐phenyilhiapropoxy)‐calix[4]arene (3) and 25,27‐dihydroxy‐26,28‐bis(3‐phenylthiapropoxy)‐5,11, 17, 23‐tetra‐tert‐butylcalix[4]arene (4) were synthesized for the evaluation of their ion‐selectivity in ion‐selective electrodes (ISEs). ISEs based on 3 and 4 as neutral ionophores were prepared, and their selectivity coefficients for Ag+ (lg Apotag,M) were investigated against other alkali metal, alkaline‐earth metal, aluminum, thallium (I), lead and some transition metal ions using the separate solution method (SSM). These ISEs showed excellent Ag+ selectivity over most of the interfering cations examined, except for Hg2+ and Fe2+ having relative smaller interference (Ig Kpotag,M≤ − 2.1).
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