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Detection and discrimination of Zn2+ and Hg2+ using a single molecular fluorescent probe

Abstract

A new fluorescent probe (SAPH) has been introduced which shows specific sensing towards Zn2+ and Hg2+ in two different wavelength maxima at physiological pH. The probe shows a brilliant ratiometric red shift in emission spectra upon addition of Zn2+ at 678 nm while Hg2+ shows a turn-on ratiometric emission enhancement with a red shift at 647 nm. Job’s plot confirms the 1:1 complexation for both Zn2+ and Hg2+. Binding constants have been calculated using Benesi-Hildebrand equation and found to be 3.03×105 M-1 and 6.05×104 M-1 respectively for SAPH-Zn2+ and SAPH-Hg2+. DFT and TDDFT studies are conducted with the probe to establish a similarity between theoretical and experimental outcomes.

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Publication details

The article was received on 12 Mar 2018, accepted on 13 Apr 2018 and first published on 14 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ01212A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Detection and discrimination of Zn2+ and Hg2+ using a single molecular fluorescent probe

    T. K. Mondal, S. Gharami, K. Aich and L. Patra, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01212A

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