Enediyne scaffold-based highly selective chemosensor for ratiometric sensing of ions

Design, synthesis and anion recognition of ferrocene-based benzimidazolium receptors

“…In such ferrocene-containing receptors, electron transfer can be perturbed differently to the ferrocenyl unit by connecting guest binding fragments. Anion binding at the recognition unit induces a positive shift in the redox potential of the ferrocene/ ferrocenium couple [30,31]. The shifting magnitude of potential represents the response level of anion recognition [32].…”

A novel strategy for chromogenic chemosensors highly selective toward cyanide based on its reaction with 4-(2,4-dinitrobenzylideneamino)benzenes or 2,4-dinitrostilbenes

“…obtained: 131. 4 4-(N,N-Dimethylamine)-N-(2,4-dinitrobenzylidene)aniline (2) N,N-dimethyl-p-nitrosoaniline N,N-dimethylaniline (15 mL) and concentrated HCl (50 mL) were placed in a round-bottomed flask. The temperature of the system was lowered to 5°C using a glass bath.…”

“…The recognition and detection of anionic species has been extensively studied in recent years [1][2][3][4][5][6]. Many chromogenic chemosensors have been developed for the selective visual and quantitative detection of anions [7][8][9][10][11][12][13][14][15][16][17].…”

“…Compound 1 was found to be highly selective toward CN À in relation to other anions, but the mechanism of action differed from that reported for other imine detection systems [43][44][45][46], since we observed that the anion breaks the C@N bond, leading to the formation of colored species. Therefore, a detailed analysis of this process was carried out by studying three other compounds (Scheme 1), 4-(N,N-dimethylamine)-N-(2,4-dinitrobenzylidene)aniline (2), 2,4-dinitro-4 0 -methoxystilbene (3), and 2,4-dinitro-4 0 -(dimethylamino)stilbene (4). UV-vis and mechanistic studies involving the compounds were performed and are described herein.…”

Design and synthesis of azaindole heterocycle decorated new scaffold in fluorometric sensing of F− and H2PO4−

“…[ 11 ] Few years back, we investigated the anion binding of an enediyne‐based charged receptor where enediyne skeleton was stable to anion without showing anion‐induced cyclization reaction of enediyne motif at room temperature. [ 12 ] Use of this skeleton was thus successful in building up new receptor structure. In relation to this, it is noteworthy to mention that compound 1 with good stability allowed us to study anion recognition.…”