Cyanide ion colorimetric chemosensor based on protonated merocyanine in EtOH |
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Authors: | Lianfang Chen Hongmei NieGuangbo Zhang Fuwen GongYuzhu Yang Chengbin GongKun Xiao |
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Institution: | The Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China |
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Abstract: | This Letter aimed to develop an efficient method for the determination of cyanide ion (CN−). A novel colorimetric chemosensor 4-(1E)-2-(4-hydroxyphenyl)ethenyl]-1-allylpyridinium bromide (HPEAPB) was synthesized. HPEAPB displayed good selectivity toward CN− over other competing anions in ethanol. A color change from yellow to red was immediately observed upon the addition of CN− and the limit of detection (LOD) was 3.4 × 10−6 mol L−1. The sensing mechanism was discussed by UV–vis, 1H NMR titration, and a comparison study. Colorimetric test paper for CN− was prepared by attaching HPEAPB to a chromatography paper, which could be used to detect CN− in environmental samples as simply as a pH-indicator paper for pH value. The LOD of the test paper for CN− was 2.0 × 10−4 mol L−1. This detection method for CN− has potential applications in cyanide ion containing fields by combination of rapid and real-time advantages. |
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Keywords: | Cyanide ion 4-[(1E)-2-(4-Hydroxyphenyl)ethenyl]-1-allylpyridinium bromide Colorimetric test paper Environmental monitoring |
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