Journal
ANALYTICAL METHODS
Volume 7, Issue 12, Pages 5239-5244Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ay01033k
Keywords
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Funding
- Chongqing City Board of Education [CY130205]
- Southwestern University National College Students' innovation and entrepreneurship training program [201410635023]
- National Natural Science Foundation of China [20872121]
- CQ CSTC [2013jcyjA50026]
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A colorimetric cyanide ion (CN-) sensor 4-[(1E)-2-(2-hydroxyphenyl) ethenyl]-1-allylpyridinium bromide (2-HPEAPB) was synthesized via condensation and N-alkylation reactions using 4-methylpyridine and salicylaldehyde as the starting materials. 2-HPEAPB displayed good selectivity, fast response, and high sensitivity toward CN- over other competing anions in acetonitrile-water (95 : 5, v/v) with a limit of detection of 8.0 x 10(-6) mol L-1 by the naked eye. The sensing mechanism and the influence of pH and temperature on sensing properties were investigated. Colorimetric test paper for CN- was prepared by absorption of 2-HPEAPB to a chromatography paper, which could be used to detect CN- directly and quickly. Analytical application of measuring CN- concentration in an electroplating wastewater in real-time was conducted successfully.
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