A. Mahapatra, Giridhari Hazra, N. Das
Aug 10, 2011
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Influential Citations
118
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Quality indicators
Journal
Sensors and Actuators B-chemical
Abstract
Abstract A new triphenylamine-based fluorogenic probe bearing an indolylmethane unit ( R1 ) was developed as a fluorescent chemosensor with high selectivity toward Cu 2+ over other cations tested. The new probe R1 only sensed Cu 2+ among heavy and transition metal (HTM) ions in CH 3 CN/H 2 O (70/30, v/v) solution. The capture of Cu 2+ by the receptor resulted in deprotonation of the secondary amine conjugated to the triphenylamine, so that the electron-donation ability of the “N” atom would be greatly enhanced; thus sensor showed a 250 nm change in the new absorption band (from 291 nm to 541 nm) and a large colorimetric response, it also exhibited the large decrease in fluorescence intensity at 378 nm and affinity to Cu 2+ over other cations such as Hg 2+ , Fe 3+ , Pb 2+ , Zn 2+ , Cd 2+ , Ni 2+ , Co 2+ and Mn 2+ make this compound a useful chemosensor for Cu 2+ detection in CH 3 CN/H 2 O (70/30, v/v) mixture. The probe R1 ( c = 1.0 × 10 −6 M) displayed significant fluorescence change and colorimetric change upon addition of Cu 2+ among the metal ions examined.