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Naked-eye fluorescent sensor for copper (II) ion based on naphthalene conjugate BODIPY dye

Abstract

A novel naphthalene-Bodipy dye (N-Bodipy) was designed, prepared and characterized. N-Bodipy showed a selective and sensitive recognition toward Cu (II) ion as a fluorescent antenna group in acetonitrile/water over other metal cations. The complexation between Cu (II) ion and N-Bodipy gave a specific color change as well as a fluorescence quenching under longwave light (365 nm). The remarkable quenching effect in fluorescence intensity centered at 538 nm was only observed in the presence of copper (II) ion. Moreover, the orange color of N-Bodipy solution turned to pale-yellow depending on the complexation effect in daylight. The complex stoichiometric was determined by a Job's plot and it was found as 2:1 (ligand/metal). The binding constant was calculated with Benesi-Hildebrand equation as 1.39x1010 M-1 and detection limit was 1.28 µM (LOD = 3α/slope, α is standard deviation) for Cu (II). The data proved that the binding between N-Bodipy and Cu (II) is chemically reversible.

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Publication details

The article was accepted on 13 Jun 2018 and first published on 13 Jun 2018


Article type: Paper
DOI: 10.1039/C8PP00137E
Citation: Photochem. Photobiol. Sci., 2018, Accepted Manuscript
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    Naked-eye fluorescent sensor for copper (II) ion based on naphthalene conjugate BODIPY dye

    A. N. Kursunlu and C. Baslak, Photochem. Photobiol. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8PP00137E

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