Article ID Journal Published Year Pages File Type
5131337 Analytica Chimica Acta 2016 8 Pages PDF
Abstract

•Designing a novel electro-fluorescent sensor for determination of Fe3+ ions.•PPy-Tiron electropolymerized on FTO electrode as a sensory material.•Highly selective, sensitive and fast recognition of Fe3+ ions.•Use of the electro-fluorescence sensor for Fe3+/Fe2+ speciation in aqueous solutions.

Nanostructured polypyrrole (PPy) film doped with Tiron was electrodeposited from aqueous solution on the surface of transparent electrode and used for sensitive, selective and rapid electrically controlled fluorescence detection of Fe3+ in aqueous media. The fluorescence intensity of PPy-Tiron film decreases linearly in the presence of Fe3+ by applying negative potential over a concentration range from 5.0 × 10−8 to 1.0 × 10−6 mol L−1, with a relatively fast response time of less than 30 s at pH 7.4. The detection is not affected by the coexistence of other competitive metal ions such as Al3+, Ce3+, Tl3+, La3+, Bi3+, Cr2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Pb2+, Na+, K+, Mg2+, Ca2+, Sr2+ and Ba2+. The proposed electro-fluorescence sensor has a potential application to the determination of Fe3+ in environmental and biological systems. The fluorescent thin film sensor was also used as a novel probe for Fe3+/Fe2+ speciation in aqueous solution.

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Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry