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Cholesterol-based diazine derivative: selective sensing of Ag+ and Fe3+ ions through gelation and the performance of metallogels in dye and picric acid adsorption from water

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Abstract

Cholesterol appended diazine derivative 1 on a 4-hydroxybenzaldehyde scaffold has been designed and synthesized. The compound having diazine as a metal ion binding site forms nice gels with Ag+ and Fe3+ ions over a series of other metal ions from CHCl3/CH3OH (3 : 1, v/v). Strong hydrophobic interaction owing to the presence of cholesterol has a marked contribution in aggregation. The SEM image reveals fibrillar to globular porous microstructures. The true nature of the gels is determined from a rheological study. The Ag+ and Fe3+-gels are distinguishable with the aid of tetrabutylammonium chloride, tetrabutylammonium bromide or fluoride and ammonium thiocyanate. There is no interference of Fe2+ ions in the detection of Fe3+ ions. The presence of Fe2+ ions in solution can successfully be ascertained through gelation of 1 in the specified solvent upon adding external oxidising agents such as m-CPBA. As an application, both the Ag+- and Fe3+-gels of 1 act as good adsorbents for adsorption of uranine dye and picric acid from aqueous solution. In this process, the metallogels are recyclable and exhibit excellent efficiency.

Graphical abstract: Cholesterol-based diazine derivative: selective sensing of Ag+ and Fe3+ ions through gelation and the performance of metallogels in dye and picric acid adsorption from water

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Publication details

The article was received on 28 Aug 2018, accepted on 04 Oct 2018 and first published on 04 Oct 2018


Article type: Research Article
DOI: 10.1039/C8QM00433A
Citation: Mater. Chem. Front., 2018, Advance Article
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    Cholesterol-based diazine derivative: selective sensing of Ag+ and Fe3+ ions through gelation and the performance of metallogels in dye and picric acid adsorption from water

    A. Panja and K. Ghosh, Mater. Chem. Front., 2018, Advance Article , DOI: 10.1039/C8QM00433A

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