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Development of a fluorescent chemosensor towards sensing and separation of Mg2+ ions in chlorophyll and hard water

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Abstract

A dyad bearing a disulfide spacer and a naphtholyl terminal group with imine functionality has been synthesised (compound LH2) and assessed for its metal ion binding ability in an aqueous medium. This receptor molecule selectively binds Mg2+, with an enhancement in fluorescence intensity of the band at 550 nm. The results show a turn-on response for Mg2+ binding through a PET mechanism. The photophysical properties of the receptor in different solvents, at various pH values and with various metal ions are studied. The receptor molecule shows visible sensing for Mg2+ ions in a (Cynodon dactylon) plant leaf extract which contains chlorophyll. Also, a polysulphone memberane is prepared by incorporating the receptor in it and used for filtering water containing an excess of Mg2+ ions. Fluorescence signal output-based molecular logic gates (NOR, X-NOR) are proposed using H+ and Mg2+ ions as inputs into the molecule.

Graphical abstract: Development of a fluorescent chemosensor towards sensing and separation of Mg2+ ions in chlorophyll and hard water

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Publication details

The article was received on 10 Oct 2017, accepted on 27 Nov 2017 and first published on 27 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03888G
Citation: New J. Chem., 2018, Advance Article
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    Development of a fluorescent chemosensor towards sensing and separation of Mg2+ ions in chlorophyll and hard water

    G. Tamil Selvan, C. V., E. Israel V. M. V. and P. M. Selvakumar, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ03888G

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