Coumarinic chalcone derivatives as chemosensors for cyanide anions and copper ions

摘要

Four coumarinic chalcone derivatives were synthesized via typical condensation reaction between 4-(hydroxyl)coumarinketone and 4-(diethylamino)-benzaldehyde or 7-(diethylamino)coumarinaldehyde in good yields. Their crystal structures and recognition properties for cyanide and copper ions were investigated. The results indicate that the compounds exhibit quick and obvious color and fluorescence response to the ions with high sensitivity and selectivity in acetonitrile. Mechanism studies suggest that cyanide group is possibly bonded to 4-position of coumarin group or the α carbon atom of C=C bridge. Coordinate between the compounds and copper ions forms.