Abstract
The synthesis and characterization of a new tetra (triphenylphosphonium) p-tert-butylcalix[4]arene 2 is presented. Its interactions with anions were studied by 1H and 31P NMR and UV absorption spectrophotometry, showing the biggest interaction with ClO4 − , I− and SCN− . Anion selectivity in ion-selective PVC-membrane electrodes (ISEs) plasticized with o-NPOE containing ionophore 2 was also investigated. Compound 2 shows a potentiometric response for various anions with the following selectivity pattern: ClO4 − > SCN− > I− > Cr2O7 2 − > NO3 − > Br− > Cl− .
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