A novel 100% aqueous solution near-infrared ratiometric fluorescent CN- probe based on 1,4-dihydropyridines, with a large fluorescent emission peak shift

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe2+ ions

“…22,23 In recent years, this reaction has been introduced into the field of polymer chemistry and has gained wide interest. [24][25][26][27][28][29] In theory, when a diamine and dialdehyde are selected as the components in a Hantzsch reaction system, Hantzsch polymerization can take place, and the resulting poly(1,4-dihydropyridine) derivatives (PDPEs) can be prepared. In our experiments, we have selected five common diamines (ethylenediamine, butanediamine, hexamethylenediamine, 1,8-diaminooctane, and 1,10-diaminodecane) and two dialdehydes (aromatic terephthalaldehyde and aliphatic glutaraldehyde) as the difunctional components.…”

A New Phenothiazine-Based Fluorescent Sensor for Detection of Cyanide

“…CN − in the human body would prevent Fe 3+ from being reduced to Fe 2+ , which inhibits the transmission of electrons and affects cell respiration, and then damages the central nervous system, which is most sensitive to hypoxia, causing vomiting, coma and even suffocation [5][6][7]. Research shows that the lethal concentration of cyanide to the human body is only 0.5-3.5 mg/kg, so CN − detection is of great significance in many research fields and it is urgent to develop convenient and effective CN − detection methods [8][9][10][11]. Fluorescence sensors, as a new detection method, have been widely used in the detection of CN − because of their good sensitivity, selectivity and rapid response [12][13][14][15][16][17][18][19].…”

Dual-Responsive Benzo-Hemicyanine-Based Fluorescent Probe for Detection of Cyanide and Hydrogen Sulfide: Real-Time Application in Identification of Food Spoilage

“…Fluorescence turn-on probes have acquired more attention than titrimetric, electrochemical, and ion chromatography methods for sensing these anions because of their high sensitivity, selectivity, and appropriate application in bioimaging. − Many chromogenic and fluorogenic sensors for these anions have been reported in previous years. Various modes of interactions such as CN – coordination, hydrogen bonding interactions, deprotonation, , and nucleophilic reactivity − have been incorporated to monitor cyanide ions, whereas cleavage of the alkoxyl bond (R–O), − cleavage of the S–O bond, , Michael addition, , displacement from metal ion complexes, − and reduction of azide − and nitro groups − have been utilized for the detection of sulfide, hydrosulfide ions, and hydrogen sulfide. Nowadays, the development of a multi-ion-responsive unimolecular system is one of the principal interests and not an easy task in the chemosensor field. , Among the different modes of host–guest interactions, the nucleophilic addition of anions exhibits more advantages than those of other methods such as reactivity in aqueous medium, neutral to basic pH, etc., but the main drawback is the poor selectivity due to the interference of other anions.…”