| 초록 |
A colorimetric chemosensor was designed that can-do rapid detection of cyanide ions in pure aqueous media. A random terpolymer (P1) of N,N´-dimethylacrylamide (DMA), 2-((E)-4-((E)-(4-((2-(acryloyloxy)ethyl)(methyl)amino)phenyl)diazenyl)styryl)-1,3,3-trimethyl-3H-indol-1-ium (M1), and N-(4-benzoylphenyl)acrylamide (BPAm) was synthesized via free radical polymerization. Upon the addition of CN- ions to a P1 aqueous solution, an apparent color change from brick-red to light yellow having a LOD of 1.23 µM. P1 exhibited excellent selectivity toward CN- over other anions and bio-thiols. The colorimetric response of CN- on P1 originated from the nucleophilic attack of CN- anions onto the electron-deficient polarized C=N bonds of P1’s indolium moieties, resulting in the perturbation of the ICT process occurring within the probe. P1 was also immobilized on a quartz slide to afford for a real-world, practical on-site applications. |
