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Triazole-amide isosteric pyridine-based supramolecular gelators in metal ion and biothiol sensing with excellent performance in adsorption of heavy metal ions and picric acid from water

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Abstract

Pyridine-based small molecular gelators 1–4, having a triazole-amide isosteric relationship, have been synthesized. Compounds 1–3 exhibit excellent gelation from DMSO–H2O (1 : 2, v/v), while compound 4 forms a gel in the presence of Ag+ ions in DMSO–H2O (1 : 2, v/v). The change from triazole to isosteric amide has a marked effect on the gelling abilities, minimum gelation concentrations (mgc), thermal stability, mechanical properties, metal ion-responsive character and adsorption properties of the structures, as established by various techniques. All the gels have been successfully applied in sophisticated sensing kits for the selective detection of Cu2+ and Ag+ ions and thiol-containing amino acids. The triazole-based gelators 1 and 3 adsorb heavy metal ions from water with greater efficiency than the isosteric amide-based gelators. The metallogel 4–Ag+ can be used in the efficient removal of picric acid (a nitro explosive) from water.

Graphical abstract: Triazole-amide isosteric pyridine-based supramolecular gelators in metal ion and biothiol sensing with excellent performance in adsorption of heavy metal ions and picric acid from water

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Publication details

The article was received on 28 Aug 2018, accepted on 24 Nov 2018 and first published on 26 Nov 2018


Article type: Paper
DOI: 10.1039/C8NJ04380A
Citation: New J. Chem., 2019, Advance Article
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    Triazole-amide isosteric pyridine-based supramolecular gelators in metal ion and biothiol sensing with excellent performance in adsorption of heavy metal ions and picric acid from water

    A. Panja and K. Ghosh, New J. Chem., 2019, Advance Article , DOI: 10.1039/C8NJ04380A

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