A ratiometric chemodosimeter for highly selective naked-eye and fluorogenic detection of cyanide.

摘要: A simple indole-based chemosensor (1) with a very low molecular weight of 207 g mol(-1) has been synthesized for the highly reactive and selective detection CN(-) in aqueous media, even presence other anions, such as F(-), Cl(-), Br(-), AcO(-), [Formula: see text] , SCN(-), BzO(-), . The sensor achieves rapid cyanide anion 2 min, pseudo-first-order rate constant is estimated 1.576 min(-1). colorimetric ratiometric fluorescent response to attributable addition electron-deficient dicyanovinyl group 1, which prevents intramolecular charge transfer. sensing mechanism supported by density functional theory time-dependent calculations. Moreover, 1 exhibits both high accuracy determining concentration real samples 1-based test strips can conveniently detect without any additional equipment. limit (1.1 μM) lower than maximum permissible level (1.9 μM) drinking water.