Bis-Triazole-Appended Azobenzene Chromophore for Selective Sensing of Copper(II) Ion

A Cu2+-specific colorimetric sensor of bis-triazole-appended azobenzene receptors I and II was designed and synthesized. Receptor II shows high selectivity toward Cu2+ in acetonitrile/water (80:20, v/v) solution based on the internal charge transfer (ICT) mechanism. The tridentate coordination behav...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 50; no. 13; pp. 8225 - 8229
Main Authors Hrishikesan, Elango, Saravanan, Chinnusamy, Kannan, Palaninathan
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 06.07.2011
Subjects
Applied sciences
Chemical engineering
Exact sciences and technology
Separations
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Summary:A Cu2+-specific colorimetric sensor of bis-triazole-appended azobenzene receptors I and II was designed and synthesized. Receptor II shows high selectivity toward Cu2+ in acetonitrile/water (80:20, v/v) solution based on the internal charge transfer (ICT) mechanism. The tridentate coordination behavior was proposed with 1:1 stoichiometry between receptor II and Cu2+. Herein, the Cu2+ gives rise to a large change in the absorption spectra (from red to pale yellow) that is clearly visible to the naked eye.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie200548j