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A multi-analyte selective dansyl derivative for the fluorescence detection of Cu(II) and cysteine

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Abstract

A new multi-analyte selective fluorescence chemosensor DA was synthesized by a simple one pot reaction between dansyl chloride and 2-aminobenzohydrazide in the presence of a base. In DMSO : H2O (1 : 1, v/v), the fluorescence of DA at 483 nm was blue shifted and enhanced at 474 nm along with a new shoulder peak appearing at 411 nm selectively in the presence of Cu2+ among the other tested metal ions due to the chelation enhanced fluorescence (CHEF) effect. Without any noticeable interference from potentially competitive metal ions, sensor DA can detect Cu2+ down to 9.79 × 10−7 M. Sensor DA gives satisfactory results for the quantification of Cu2+ in real water samples. Sequentially, the resultant in situ generated DA–Cu2+ complex is applied for the selective sensing of bioactive cysteine with a detection limit down to 1.76 × 10−6 M.

Graphical abstract: A multi-analyte selective dansyl derivative for the fluorescence detection of Cu(ii) and cysteine

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Publication details

The article was received on 18 Feb 2019, accepted on 01 Apr 2019 and first published on 02 Apr 2019


Article type: Paper
DOI: 10.1039/C9PP00080A
Citation: Photochem. Photobiol. Sci., 2019, Advance Article

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    A multi-analyte selective dansyl derivative for the fluorescence detection of Cu(II) and cysteine

    A. Thangaraj, V. Bhardwaj and S. K. Sahoo, Photochem. Photobiol. Sci., 2019, Advance Article , DOI: 10.1039/C9PP00080A

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