Colorimetric and Highly Selective Fluorescence "Turn-on" Detection of Cr3+ by Using a Simple Schiff Base Sensor

Authors

  • Yunxu Yang,

    Corresponding author
    1. Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, China
    • Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, China
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  • Huimin Xue,

    1. Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, China
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  • Laicheng Chen,

    1. Petrochemical Department, Puyang Vocational Technology College, Puyang, Henan 457000, China
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  • Ruilong Sheng,

    Corresponding author
    1. Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
    • Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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  • Xuqin Li,

    1. Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, China
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  • Kun Li

    1. Department of Chemistry and Chemical Engineering, University of Science and Technology of Beijing, Beijing 100083, China
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Abstract

A simple 8-quinolinecarboxaldehyde derived antipyrine Schiff base (QA) was synthesized and characterized, which exhibited high selectivity to Cr3+ over other metal cations. The Cr3+ recognition of QA could be achieved by means of fluorescense and absorption spectra, moreover, the obvious color change from colorless to yellowish is easily observed by naked-eyes. The binding constant of QA to Cr3+ was evaluated by spectral titration and the binding model was in 1:1 stoichiometry measured by Job's plot.

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