A highly selective, sensitive and "turn-on" fluorescent sensor for the paramagnetic Fe3+ ion

作者：Nandhini Thanasekaran; Kaleeswaran Palanichamy; Pitchumani Kasi^*

来源：Sensors and Actuators B: Chemical , 2016, 230: 199-205.

DOI：10.1016/j.snb.2016.02.054

• Paramagnetic ion
• Turn on Fluorescence
• Sensor
• Fe (III)
• Charge transfer
• Chemosensor

A highly selective and sensitive chemosensor for Fe3+ ion using 2-((4-methylbenzo-[d]thiazole-2-ylimino)methyl)phenol is developed. The probe 1 is found to be more selective towards Fe3+ over other metal ions such as Li+, Na+, Ca2+, Mn2+, Cr3+,Co2+, Ni2+, Cu2+, Hg2+, Pb2+, Cd2+, Al3+, Zn2+, Ru3+ and Ag+ with a limit of detection 0.89 nM. Upon binding to Fe3+ ion, a strong fluorescent enhancement is observed which is attributed to an increase in Charge Transfer. A 1:1 binding between probe 1 and Fe3+ ion is evidenced by Job's plot. The proposed mechanism is strongly supported by TD-DFT calculations.

• 出版日期2016-7