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Rational design of a novel azoimine appended maleonitrile-based Salen chemosensor for rapid naked-eye detection of copper(II) ion in aqueous media.
- Source :
-
Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Dec2015, Vol. 151, p848-853. 6p. - Publication Year :
- 2015
-
Abstract
- Achieving specific selectivity and high sensitivity for the colorimetric recognition of copper(II) ions in aqueous media over a complex background of potentially competing metal ions is inherently challenging in sensor development. Thus, a novel azo–azomethine receptor ( L ) based on the combination of 2-amino-3-(5-bromo-2-hydroxybenzylamino)maleonitrile and azo-coupled salicylaldehyde scaffold has been designed and synthesized for the naked-eye and rapid detection of Cu 2+ ion at trace level in a wide pH range. Accordingly, the devised chemosensor distinguished Cu 2+ from other metal ions by distinct color change from light yellow to light brown without any expensive equipment. The binding stoichiometry between Cu 2+ and L has been investigated using Job’s plot and MALDI-TOF mass analysis. Remarkably, the current sensor can detect Cu 2+ ions even at 1.07 μM level, which is lower than the World Health Organization (WHO) permissible level (30 μM) in drinking water. Furthermore, sensor L was successfully utilized in the preparation of test strips for the detection of copper(II) ions from aqueous environment. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITRILES
*CHEMORECEPTORS
*COPPER ions
*AQUEOUS solutions
*COLORIMETRY
Subjects
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 151
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 109358460
- Full Text :
- https://doi.org/10.1016/j.saa.2015.06.127