Issue 14, 2022

Pyridoxal-based low molecular weight progelator as a new chemosensor for the recognition of Ag+ and Hg2+ under different conditions

Abstract

Pyridoxal-based low molecular weight progelator 1 has been designed and synthesized for the selective visual detection of Ag+ ions through sol-to-gel conversion. Compound 1 shows excellent gelation property with desired gel stiffness only in the presence of Ag+ ions over a series of other metal ions in 1 : 1 (v/v) aqueous solvent system miscible with organic solvents such as DMSO, DMF, and dioxane, and validates the visual detection of Ag+ ions. The gel properties were studied by FTIR, UV-Vis, scanning electron microscopy (SEM), and rheology measurements. Minimum gelation concentration was found to be 3 mg mL−1. While Ag+-induced metallogel in DMSO/H2O is thermally reversible, it is irreversible in the DMF/H2O system. The model compound 2, devoid of hydroxyl groups, did not show gelation under identical conditions and established the role of pyridoxal moiety in 1. In addition, compound 1 exhibits the selective sensing of Hg2+ ions over a series of metal ions in the solution phase, as established by UV-Vis, fluorescence, and 1H NMR studies.

Graphical abstract: Pyridoxal-based low molecular weight progelator as a new chemosensor for the recognition of Ag+ and Hg2+ under different conditions

Supplementary files

Article information

Article type
Paper
Submitted
29 Mar 2022
Accepted
31 May 2022
First published
01 Jun 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 5836-5844

Pyridoxal-based low molecular weight progelator as a new chemosensor for the recognition of Ag+ and Hg2+ under different conditions

S. G. Roy, A. Kumar, N. Misra and K. Ghosh, Mater. Adv., 2022, 3, 5836 DOI: 10.1039/D2MA00358A

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