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Colorimetric signaling of Cu(II) ions by oxidative coupling of anilines with 4-aminoantipyrine
- Issue Date
- Sep-2015
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Cu2+ ions; Colorimetric signaling; 4-Aminoantipyrine; Anilines; Oxidative coupling
- Citation
- TETRAHEDRON LETTERS, v.56, no.40, pp 5393 - 5396
- Pages
- 4
- Journal Title
- TETRAHEDRON LETTERS
- Volume
- 56
- Number
- 40
- Start Page
- 5393
- End Page
- 5396
- ISSN
- 0040-4039
- Abstract
- Selective Cu2+ signaling by the oxidative coupling of anilines with 4-aminoantipyrine was investigated. The Cu2+-assisted reaction between N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethylaniline sodium salt and 4-aminoantipyrine resulted in the pronounced color change from colorless to bluish green, with a detection limit of 2.1 x 10(-6) M in 90% aqueous acetonitrile. Furthermore, selective Cu2+ signaling was not affected by the presence of common metal ions as background. The practical utility of this system for the determination of Cu2+ was successfully demonstrated using a convenient chromogenic test strip. (C) 2015 Elsevier Ltd. All rights reserved.
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