Search

We developed a novel dual-channel sensor (FA) applied for selectively detecting the CN−in DMSO/H2O (3:7, v/v) solutions. The selectivity and sensitivity of sensor FA for anions sensing were investigated by measuring the photophysical properties. Those observations suggested that FA can display the preferable sensitivity to CN−ions with “turn-on” fluorescent response and distinct color variation in the visible light and have strong anti-interference toward other common anions in colorimetric and fluorescent reaction. The colorimetric and fluorescence detection limit of CN−ion was measured to be 1.46 × 10−7M and 2.37 × 10−8M, respectively. The reaction mechanism of the probe has been studied by 1H NMR titration and DFT theoretical calculations. In addition, the test strips were prepared, which is verified to be a convenient and efficient test kit for detecting CN−by naked-eyes in the actual sample. Finally, this sensor was successfully applied to detecting CN−in food samples.

We designed and synthesized a carboxylic acid-functionalized coumarin derivative sensor F3, which has a dual-channel response to CN−in DMSO/H2O (2:3, v/v) solution with a fluorescence detection limit of 3.09 × 10–8M. After adding AcOH to F3-CN system, the fluorescence of the system recovered to its initial state, so F3 is a reversible fluorescence chemical sensor. Based on this, we applied it to the ultrasensitive IMPLICATION logic gate. In addition, we made a test strips that can be used to quickly and conveniently detect CN−. According to various characteristics and applications of F3, it can be concluded that sensor F3 is a promising sensor. The detection methods have strong anti-interference ability, convenient use, fast response speed and low detection limit.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.