Colorimetric sensing of cyanide and fluoride ions by diaminomalenonitrile based Schiff bases

Recent progress in development of 2,3-diaminomaleonitrile (DAMN) based chemosensors for sensing of ionic and reactive oxygen species

“…(1) and (E)-2-(amino(((9-ethyl-9H-carbazol-2-yl)methylene)amino)methylene) maleonitrile (2) were developed in which DAMN was linked with uorene and carbazole moiety respectively through imine linkage. 34 Fluorene and its derivatives are electron rich uorophore in which two benzene rings connected by a vemembered ring therefore provide extended p-conjugated orbitals. The fascinating electronic properties, high quantum yield and high sensitivity make uorene an effective signalling unit for the development of chemosensors.…”

Aggregation‐induced emission properties of pyridyl‐containing tetra‐arylethenes

“…[16][17][18][19][20][21][22] As well known, the electronic characteristic of organic fluorescent molecules greatly affects their optical properties. [23][24][25][26][27] Many organic AIE-active fluorophores have been employed to study the relationship between electronic effects and AIE properties, however these molecules usually have obvious distinct molecular structures. [28][29][30][31][32] The AIE properties of fluorophores with the same emissive core and obviously different electronic effects are rarely studied.…”

Phenazine‐Based Fluorescence “Turn‐Off” Sensor for Fluoride: Application on Real Samples and to Cell and Zebrafish Imaging

“…Artificial sources of fluoride are of immense use in large-scale industries such as mining, steel and sponge iron, crude oil refinery and drilling, aluminum industry, chemical and plastic industry, agriculture and pesticide manufacturer, dye manufacturer, metal extraction and so forth and in many daily need goods such as toothpaste, mouth rinses and in food supplements. [ [15][16][17][18][19] The increased industrial wastes of these kinds would lead to large-scale Fcontamination of water sources. According to "WHO" regulation, permissible limit of fluoride in water is around 1.5 mg/Liter.…”

“…According to "WHO" regulation, permissible limit of fluoride in water is around 1.5 mg/Liter. [20] There are explicit reports for fluoride ion sensing based on various mechanisms like deprotonation-protonation, [14] chemodosimetric approach, [15] complexation with probe though H-bond formation, [16] use of metal complexes as fluoride detector, [17] pH depended trapping of fluoride using specific core size of the receptor. Of these methods, deprotonation of acidic proton present in receptor distinctness, as this approach allows for the permanent achievement of low detection limit, high specificity and selectivity; low response time and distinct intense colorimetric and fluorometric response through Internal Charge Transfer (ICT) mechanism.…”