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

Year 2019, Volume: 1 Issue: 1, - , 11.12.2019

Abidin Gümrükçüoğlu Nurhayat Özbek Tuğba Ak Elvan Vanlı Miraç Ocak Ümmuhan Ocak

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 Cd²⁺, Zn²⁺, Cu²⁺ and Hg²⁺
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 to0.15 mg L^-1 where the fluorescence
intensity of the phenanthrene
derivative compound showed a regular decrease with the increase of the Hg²⁺
ion concentration was obtained. The method developed for the
determination of Hg²⁺ 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

Supporting Institution

The Scientific and Technological Research Council of Turkey (TUBITAK)

Project Number

114Z387

Thanks

The Scientific and Technological Research Council of Turkey (TUBITAK)

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