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Nanomolar level selective dual channel sensing of Cu2+ and CN- from aqueous medium by an opto-electronic chemoreceptor

Abstract

A dual channel chromogenic and fluorogenic fused aromatic system based chemoreceptor (2-(benzo[d]thiazol-2-yl)-1-((pyren-8-yl)methylene)hydrazine) (TyM) has been designed for ditopic sensitivity towards heavy and transition metal ions (HTMs) like Cu2+ in the aqueous medium and lethal CN- in semi-aqueous medium. The chemoreceptor displays proclivity towards the targeted analytes with distinct optical response (yellow to colorless in case of Cu2+ and yellow to bright red for CN-). TyM forms a 2:1 adduct with Cu2+ with a detection limit of 40 nM. A 1:1 binding stoichiometry has been confirmed with the chemoreceptor TyM with CN- in sub-nano molar limit of detection. In addition to sophisticated spectroscopic analysis like UV-Vis, Fluorescence, FT-IR, 1H-NMR, 13C-NMR, ESI-MS and HRMS the plausible mechanistic course of sensing has also been established from theoretical perspective. The reversible UV-Vis response of the chemoreceptor TyM towards CN- and H+ can mimic different molecular logic functions and therefore can be exploited for designing several complex electronic circuits principally based on Boolean Algebra. In vitro fluorescence imaging in male microspores of seed plants (Bohonia Nigalandra) and Monilia Albicans (diploid fungus) with TyM and Cu2+ confirms permeability of the chemoreceptor TyM at the cellular level as well as its ability to investigate transition metals like Cu2+ in biological samples.

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Publication details

The article was received on 10 Oct 2017, accepted on 06 Dec 2017 and first published on 06 Dec 2017


Article type: Paper
DOI: 10.1039/C7DT03802J
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Nanomolar level selective dual channel sensing of Cu2+ and CN- from aqueous medium by an opto-electronic chemoreceptor

    S. Paul, P. Ghosh, S. Bhuyan, S. K. Mukhopadhyay and P. Banerjee, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03802J

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