A highly selective and sensitive fluorescent 'turn-on' chemosensor for Al3+ based on C=N isomerisation mechanism with nanomolar detection

作者：Torawane Pritam; Tayade Kundan; Bothra Shilpa; Sahoo Suban K; Singh Narinder; Borse Amulrao^*; Kuwar Anil

来源：Sensors and Actuators B: Chemical , 2016, 222: 562-566.

DOI：10.1016/j.snb.2015.08.104

• Fluorescent sensor
• Al3+
• Turn-on
• C=N isomerisation
• DFT

A new Schiff base 1 was synthesised by direct condensation of 4-tert-butyl-2-aminophenol with an equimolar amount of 4-(diethylamino)-2-hydroxybenzaldehyde and characterised by single crystal XRD. The chemosensing ability of 1 in ethanol was evaluated towards various metal ions prepared in H2O. Sensor I showed a high sensitivity and selectivity for Al3+ through a significant 'turn-on' fluorescence response at 490nm over the other tested metal ions with a detection limit down to 99.5 nM. The 1:1 binding stoichiometry between 1 and Al3+ was established using Job's plot, and the proposed complex structure was calculated by applying the DR' method.

• 出版日期2016-1