Issue 4, 2023

A new pyridoxal-derived gelator for selective recognition of CN and F under different conditions

Abstract

A pyridoxal-based new supramolecular gelator 1 is designed and synthesized. Its gelation properties have been tested in various solvents. The gelator 1 forms gels in DMSO/H2O (10 : 1, v/v) and DMF/H2O (10 : 1, v/v). The DMF/H2O (10 : 1, v/v) gel shows a highly cross-linked fibrous morphology and good viscoelastic properties. The gel matrix has been utilized for efficient ‘naked eye’ detection of CN and F ions through a phase transition with a colour change. While the DMF : H2O gel of 1 is broken in the presence of CN, the gel-to-gel colour change takes place upon contact with F and AcO ions. The use of Ca2+ distinguishes F from AcO. In solution, ratiometric changes in absorbance for 1 with CN and F over other anions are noted with a distinct colour change. Even in emission, a considerable decrease in the intensity of 1 is observed with both the ions. Importantly, the changes are pronounced with CN compared to F. The anion responsive nature of 1 in the solid state is verified using Merrifield resin-hooked bead 1a. A theoretical study is done to correlate with the experimental findings.

Graphical abstract: A new pyridoxal-derived gelator for selective recognition of CN− and F− under different conditions

Supplementary files

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Article information

Article type
Paper
Submitted
16 Dec 2022
Accepted
31 Mar 2023
First published
04 Apr 2023
This article is Open Access
Creative Commons BY-NC license

RSC Sustain., 2023,1, 914-922

A new pyridoxal-derived gelator for selective recognition of CN and F under different conditions

S. Ghosh, N. Baildya and K. Ghosh, RSC Sustain., 2023, 1, 914 DOI: 10.1039/D2SU00135G

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