HIGHLY SELECTIVE COLORIMETRIC AND FLUORESCENT CHEMOSENSOR FOR CN− BASED ON o-TOLIDINE
Abstract
A colorimetric and fluorescent chemical sensor N1 based on o-tolidine was designed and synthesized, which can be used as an efficient colorimetric and fluorescent sensor for CN− . Compared to other common anions, the color of N1 solution was observed from yellow to colorless after the addition of CN−, while under UV lamp the yellow fluorescence of N1 was clearly annihilated. In addition, the detection limit on fluorescence response of N1 for CN− was down to 4.43 ⋅ 10-7 M. 1H NMR titration suggested that the ICT process occurred between N1 and CN− , and the reaction ratio was 1:2. N1 was successfully used to detect cyanide content in bitter almonds, and N1-based test strips were also produced, which could more conveniently and effectively detect the CN− in aqueous solution.
About the Authors
Peng-Wei Ni
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou, Gansu, 730070
China
Lanzhou, Gansu, 730070
Ying Yao
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou, Gansu, 730070
China
Lanzhou, Gansu, 730070
Qing-Qing Fu
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou, Gansu, 730070
China
Lanzhou, Gansu, 730070
Chen Long
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou, Gansu, 730070
China
Lanzhou, Gansu, 730070
Jing-Han Hu
College of Chemical and Biological Engineering, Lanzhou Jiaotong University
China
Lanzhou, Gansu, 730070
China
Lanzhou, Gansu, 730070
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Review
For citations:
Ni P., Yao Y., Fu Q., Long Ch., Hu J. HIGHLY SELECTIVE COLORIMETRIC AND FLUORESCENT CHEMOSENSOR FOR CN− BASED ON o-TOLIDINE. Zhurnal Prikladnoii Spektroskopii. 2020;87(5):832-838.
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