Schiff bases carrying dipicolylamine groups for selective determination of metal ions in aqueous media. A phenanthrene-based fluorescent sensor for Hg2+ determination

Authors : Abidin Gümrükçüoğlu, Nurhayat Özbek, Tuğba Ak, Elvan Vanli, Miraç Ocak, Ümmuhan Ocak

Pages : 0-0

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Publication Date : 2019-12-11

Article Type : Research

Abstract :Abstract: Four new dipicolylamine compounds carrying anthracene, naphthalene, pyrene and phenanthrene groups were synthesized, and their ion sensor properties were studied by means of emission spectrometry in ethanol-water (1:1). It was disclosed that among a series of studied anions and cations, only with Cd 2+ , Zn 2+ , Cu 2+ and Hg 2+ cations, ligands formed complexes selectively. With spectrofluorimetric measurements, the complexation stoichiometry and the complex stability constants of the formed complexes were determined. A linear range from 0.10 µg L -1 to 0.15 mg L -1 where the fluorescence intensity of the phenanthrene derivative compound showed a regular decrease with the increase of the Hg 2+ ion concentration was obtained. The method developed for the determination of Hg 2+ was applied to tap water samples. In order to eliminate the matrix effect, a modified standard addition method was used. Detection and quantification limits were 0.009 mg L -1 and 0.027 mg L -1 , respectively.
Keywords : Ion sensor, Hg2+ determination, Dipicolylamine, Fluorescence