Reaction-based chemosensor for the reversible detection of cyanide and cadmium ions

A new Dual-Channel Chemosensor Based on Chemodosimeter Approach for Detecting Cyanide in Aqueous Solution: a Combination of Experimental and Theoretical Studies

“…of CN − , the H 8 protons of imine group at 9.8 ppm gradually disappeared and a new H 8' proton at 6.1 ppm started to appear. This result strongly suggested that the nucleophilic addition of CN − occurred at the carbon atom of imine group of 1 [64,65,[71][72][73][74]. All the aromatic protons were shifted to upfield, which suggests that the negative charge developed from the nucleophilic addition of CN − to 1 might be delocalized through the whole receptor molecule.…”

Simple colorimetric chemodosimeters for selective sensing of cyanide ion in aqueous solution via termination of ICT transition by Michael addition

“…cyanide ion to 0.74, 0.59 and 0.98, respectively. The fluorescence changes observed may be due to the fact that nucleophilic addition of cyanide ion to C=C bond causes the conjugation between donor and acceptor moieties in the receptors to break [36,37].…”

Novel styrylbenzothiazolium dye-based sensor for mercury, cyanide and hydroxide ions

“…Other potential sources of cyanide in humans and animals are sodium nitroprusside, succinonitrile and organic thiocyanates [31]. The cyanide ion can affect numerous body functions, including those of the vascular, visual, central nervous, cardiac, endocrine, and metabolic systems; exposure leads to vomiting, convulsions, the loss of consciousness and, eventually, death [32,33]. Accordingly, a number of fluorescent chemosensors and chemodosimeters that can selectively sense the cyanide ion have been developed [34,35].…”