Issue 12, 2018

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
28 Aug 2018
Accepted
04 Oct 2018
First published
04 Oct 2018

Mater. Chem. Front., 2018,2, 2286-2296

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, 2, 2286 DOI: 10.1039/C8QM00433A

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