Organic chemodosimeter for cyanide: A nucleophilic approach

Pyridylazo Derivatives with Dicyanovinyl Appendage in Selective Sensing of CN− in Sol‐Gel Medium

“…Due to the presence of dicyanovinyl motif as the recognition unit (a good Michael acceptor) in the structural backbone, we explored the gel in anion sensing. Gel state of 2 showed a sharp response towards CN − , leading to gel to sol transition.…”

“…Although several strategies for the specific detection of cyanide ions, especially the fluorometric and colorimetric sensing probes, are reported in the literature, most of them rely on hydrogen‐ bonding motifs, and thereby, suffer from less selectivity in solution due to interference of other competing basic anions like F − and AcO − . This limitation necessitates the development of reaction‐based probe where the nucleophilic addition of CN − to the specific site of the probe in solution will minimize the interference of other anions . In the midst of such attributes, the use of gel media for CN − detection is worth trying although the methodology has some problems including sensitivity and detection limit.…”

Styrene and Azo-Styrene Based Colorimetric Sensors for Highly Selective Detection of Cyanide

“…Cyanide gave hypsochromic shift (blueshift) from 647 nm to 601 nm. That phenomenon is called chemodosimeter, it is caused by nucleophilic addition CN -to binding site of sensor 2 [15][16]. Prediction interaction of sensor 2 and CN -is shown in Fig.…”

Azobenzene–Hemicyanine Conjugated Polymeric Chemosensor for the Rapid and Selective Detection of Cyanide in Pure Aqueous Media

“…The development of simple, sensitive, and eco‐friendly optical probes for the detection of biologically and environmentally toxic anions has attracted keen interest recently, because these anions play numerous roles in vital biological and industrial processes . Among the various hazardous anions, cyanide is one of the most toxic, and it is characterized by detrimental effects on both human health and the environment . Despite its deadliness, cyanide is widely used in various industrial processes (1.5 million tons per year are utilized), including gold mining, electroplating, metallurgy, and fiber and resin manufacturing .…”

“…[1][2][3][4] Among the various hazardous anions, cyanide is one of the most toxic, and it is characterized by detrimental effects on both human health and the environment. [5][6][7][8][9][10] Despite its deadliness, cyanide is widely used in various industrial processes (1.5 million tons per year are utilized), including gold mining, electroplating, metallurgy, and fiber and resin manufacturing. 11 The accidental release of cyanide ions from industrial sites can be a serious threat to the ecology and human health.…”