Silver ion-selective electrodes based on novel containing benzothiazolyl calix[4]arene

The silver ion-selective electrodes (ISEs) were prepared by incorporating f our novel calix[4]arene derivatives substituted by benzothiazolyl units, as the neutral carrier into the plasticized polymeric membranes. The construc tion, response characteristic and application of silver ISEs were investiga ted. The better results were obtained with membranes containing bis(2-benzo thiazoiyl) groups (ligand 1-2) with dibutyl phosphate (DBP) as a plasticize r. The electrodes show good Nernstial response to Ag+ over a wide concentra tion range (5 x 10(-6)-1 x 10(-1) M) for electrodes based on calix[4]arene derivatives containing benzothiazolyl groups and excellent selectivity agai nst alkali, alkaline earth and some transition metal ions. The electrode wa s used as indicator electrode in titration of Ag+ with Cl- ions. (C) 2001 E lsevier Science B.V. All rights reserved.