A selective optode membrane for silver ion based on fluorescence quenching of the dansylamidopropyl pendant arm derivative of 1-aza-4,7,10-trithiacyclododecane ([12]aneNS3)

A highly sensitive and selective flourimetric optode membrane for the determination of trace amounts of Ag+ ions was prepared. The plasticized PVC-membrane incorporating potassium tetrakis(p-chlorophenyl)borate and 1-(dansylamidopropyl)-1-aza-4,7,10-trithiacyclododecane (L), as a highly fluorescent chromoionophore, displays a calibration response for Ag+ ions over a wide concentration range of 5.0 × 10−7 to 1.7 × 10−2 M. It has a response time of <40 s. In addition to its high stability, reproducibility and relatively long working lifetime, the optical sensor revealed good selectivity for silver ion over several common diverse ions.