A reversible and selective chemosensor based on intramolecular NH⋯NH₂ hydrogen bonding for cyanide and pH detection

Abstract

A highly selective and reversible chemosensor for cyanide and pH detection was developed based on intramolecular NH···NH2 hydrogen bonding.

Dyes based on the 2(1H)‐quinolone skeleton as potential colorimetric and fluorescent sensors for cyanide anions

“…12 Currently, fluorescent probes for the detection of cyanide anions take advantage of their characteristic properties such as strong nucleophilicity and high affinity towards copper ions. Cyanide sensors are based on hydrogen bonding, 13,14 nucleophilic addition to the carbonyl moiety, [15][16][17] and formation of cyanide anion complexes. [18][19][20] Among these reactions, the nucleophilic addition was found to have a high selectivity and sensitivity for the recognition of cyanide anions.…”

A selective chromofluorogenic chemodosimeter for fluoride ions based on distyrylbenzenes derivatives containing dual Si–O groups

“…We wondered whether dosimeter 7 would also work in the solid state . The probe was adsorbed onto filter papers by immersing a filter paper in a DCM solution of dosimeter 7 (0.5 mmol/L) for 20 min and then drying it in air.…”

A CH-Controlled Colorimetric Probe Based on Anthracene Carboximide for the Near-Infrared Detection of Cyanide

“…The design of colorimetric probes based on the signal unit ( uorophore or chromophore) with binding sites (usually employed NH or OH) to detect cyanide have been widely studied due to its relative acidity of NH or OH group, which can form hydrogen bonding with cyanide or induce deprotonation favoring the uorescent and colorimetric changes [18][19][20][21]. Recently, the activated CH group, such as the CHCN group, was successfully employed as a binding site to develop a series of cyanide probes [22][23][24][25][26]. Especially, similar naphthalimide uorophore containing different binding sites, such as 1a (NH) [27], 1b (OH) [28] and 1c (CHCN) [29], have different redshift wavelengths of probes with uoride.…”