Synthesis and evaluation of potentiometric properties of pyridylthiazole derivatives

Synthesis of 2-pyridylthiazole ethers 2, 3), 4-nonyl-2-pyridylthiazole 4), 2-nonyl-4-pyridylthiazole 5) and 2-pyridylthiazole imine 6), potentially us eful as effective cation-binding ligands, is described. The potentiometric properties of ion-selective membranes prepared with 30-32 wt% PVC, 66 wt% 2 -nitrophenyloctyl ether and 2-4 wt% pyridylthiazole derivatives have been e xamined. While the membranes containing 2-pyridylthiazole ethers 1- 4) exhi bited high selectivity toward silver(I) ion, that prepared with 2-pyridylth iazole imine 6) resulted in negligible potentiometric reponse to most mono- and divalent cations.