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[en] 2-Hydroxy-1-naphthaldehyde oxime (receptor 1) serves as a selective chemosensor for cyanide anion (CN"−). In the presence of CN"−, an enhanced fluorescent intensity and red-shift were observed. The observed complexation between receptor 1 and CN"− may cause by a hydrogen bonding interaction between the OH group of receptor 1 and CN"−. - Highlights: • 2-Hydroxy-1-naphthaldehyde oxime serves as a selective chemosensor for CN"−. • In the presence of CN"−, an enhanced fluorescent and red-shift were observed
[en] A simple boronic acid derivative was utilized as a reaction-based receptor for CN− in aqueous solution. The receptor showed a selective and sensitive response to CN− over other various anions via nucleophilic addition of CN− to the imine moiety of the boronic-based receptor.