Ertekin K.Oter O.Ture M.Denizalti S.Cetinkaya E.2019-10-262019-10-2620101053-05091053-0509https://doi.org/10.1007/s10895-009-0577-5https://hdl.handle.net/11454/20001In this study, a very sensitive and highly selective irreversible optical chemical sensor (optode) for mercury ions was described. The sensing scheme was based on the interaction of Hg (II) with a newly synthesized fluoroionophore; chloro phenyl imino propenyl aniline (CPIPA) in plasticized PVC membrane. The sensor membranes were tested for the determination of mercury ion in aqueous solutions by batch and flow-through methods. The optodes allow determination of Hg (II) in the working range of 1.0×10 -9-1.0×10 -5 M with a detection limit of 4.3 ppb. The sensor exhibited excellent selectivity for Hg (II) with respect to several common alkali, alkaline earth and transition metal ions. The association constant of the 1:1 complex formation for Hg (II) was found to be K a=1.86 × 10 5 M -1. The CPIPA exhibited high fluorescence quantum yield, long excitation and emission wavelength and high Stokes' shift values in the solid matrix which makes it compatible with solid state optics. © 2009 Springer Science+Business Media, LLC.en10.1007/s10895-009-0577-5info:eu-repo/semantics/closedAccessHg(II) sensingMercury sensorOptical chemical sensorSpectrofluorometryArticle202533540Q1