Chinese Journal of Organic Chemistry >
Rapid and Highly Sensitive Dual-Channel Detection of Cyanide in Aqueous Medium and the Applications in Food Samples
Received date: 2017-12-03
Revised date: 2018-03-03
Online published: 2018-03-16
Supported by
Project supported by the National Natural Science Foundation of China (Nos. 21662031, 21661028, 21574104, 21262032).
It is well-known that cyanide anion (CN-) is a hypertoxic anion, which can cause adverse effects in both environment and living beings. Thus, it is highly desirable to develop strategies for detecting cyanide, especially in aqueous medium and food. However, due to the short half-life of free cyanide, long analysis time and interference from other competitive anions are general challenges for accurate monitoring of cyanide. Taking advantage of the special nucleophilicity of cyanide, a new colorimetric and fluorescent sensor (Q1-2) was synthesized based on naphtho[2,1-b]furan-2-carbonyl chloride and 2-aminobenzimidazole which designed by tuning the intramolecular hydrogen bonding to affect the π-conjugated efficiency. Upon the addition of cyanide anion, the probe displayed a red-shift in absorption spectra and the fluorescence decreased immediately with the detection limit of 8.0769×10-7 and 1.0510×10-9 mol/L, respectively. Other anions gave nearly no interference. Furthermore, Q1-2 was successfully applied to the naked eye identification for cyanide in the visible light and under the UV lamp in food samples and silica gel plates.
Key words： dual-channel detection; cyanide; food sample; silica gel plate
Qu Wenjuan , Li Wenting , Zhang Haili , Zhang Youming , Lin Qi , Yao Hong , Wei Taibao . Rapid and Highly Sensitive Dual-Channel Detection of Cyanide in Aqueous Medium and the Applications in Food Samples[J]. Chinese Journal of Organic Chemistry, 2018 , 38(7) : 1792 -1799 . DOI: 10.6023/cjoc201712004
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