SILVER-SELECTIVE MEMBRANE ELECTRODES USING ACYCLIC DITHIA BENZENE DERIVATIVE NEUTRAL CARRIERS - COMPARISON WITH RELATED MACROCYCLIC-COMPOUNDS

Four new acyclic dithia benzene derivatives have been synthesized: 1,3 -bis[(ethylthio)methyl]benzene; 1,3-bis[(pentylthio)methyl]benzene; 1, 3-bis[(octylthio)methyl]benzene, and 1,3-bis[(dodecylthio)methyl]benze ne. All compounds have been tested as silver(I) ion sensors in membran e-based ion-selective electrodes, exhibiting good sensitivity, detecti on limits, reproducibility and selectivity. The chemical recognition o f silver(I) by these receptors is compared to the behaviour presented by closely related macrocyclic and acyclic polythia compounds.