| Abstrak/Abstract |
A novel styrene(1)and azo-styrene(2)based chemosensor from vanillin has been successfully synthesized.Sensor1was obtained via one step Knoevenagel condensation using Ultrasound method and sensor2wasafforded via azo coupling and Knoevenagel condensation reactions. Both of sensors showed high sensitivity andselectivity to detect CN-in aqueous media, even in the presence of other anions, such as F-, Cl-, Br-, I-, CO32-, SO42-,H2PO4-, and AcO-. Colorimetric sensing of sensor1was due to the deprotonation of sensor binding site (-OH) bycyanide anion. It consequently improved the selectivity and sensitivity in sensing cyanide which was observed by thecolor change of sensor from yellowness to red-purple and then purple in 1 min. Sensor2exhibited chemodosimeterphenomenon which is caused by the nucleophilic addition of cyanide and gave color change from green to greenish-blue. The results enable to detect an detection by naked eye |
