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Reaction-based ratiometric fluorescent probe for selective recognition of sulfide anions with a large stokes shift through switching on ESIPT

Abstract

Abstract: An ESIPT based, highly selective, ratiometric fluorescent probe BNPT has been synthesized and characterized which shows turn-on fluorescence response in the presence of S2־, attributed to the removal of protective2,4-dinitrobenzene (DNB) moiety and the resulting fluorescent product has been used for the selective detection of Zn2+. UV-vis and fluorescence spectroscopy analysis, DFT and TDDFT calculations were carried out to understand the sensing mechanism. The probe BNPT displays rapid response time and good sensitivity. The probe can detect quantitatively in a concentration range of 0–6.0 µM. The detection limit is 31.3 nM. The sensing ability of BNPT for has been successfully applied in real water samples. Applicability as in-field test kit has been demonstrated by sensing with BNPT coated TLC plate. The probe BNPT has been successfully used for visualization of intracellular in living cells. The uniqueness lies in the fact that starting with the probe BNPT, sensing of can be achieved by two different mechanisms - first, by selective de-protection of the probe BNPT by and second, by reacting with Zn2+ ensemble with S2־.

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Publication details

The article was received on 25 Aug 2017, accepted on 09 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03207B
Citation: New J. Chem., 2017, Accepted Manuscript
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    Reaction-based ratiometric fluorescent probe for selective recognition of sulfide anions with a large stokes shift through switching on ESIPT

    P. Karmakar, S. Manna, S. S. Ali, U. N. Guria, R. Sarkar, P. Datta, D. Mandal and A. K. Mahapatra, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03207B

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