Author/Authors :
Chen، نويسنده , , Lianfang and Nie، نويسنده , , Hongmei and Zhang، نويسنده , , Guangbo and Gong، نويسنده , , Fuwen and Yang، نويسنده , , Yuzhu and Gong، نويسنده , , Chengbin and Tang، نويسنده , , Qian and Xiao، نويسنده , , Kun، نويسنده ,
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.
