Issue 5, 2022

A fluorescent colorimetric vanillin di-Schiff base chemosensor for detection of Cu(ii) and isolation of trinuclear Cu(ii)–dihydrazide

Abstract

In this work, we developed a simple fluorescent colorimetric chemosensor H2L [6,6′-((1,1′)-hydrazine-1,2-diylidene bis(methanylylidene)) bis(2-(6-methoxy)) phenol] for rapid detection of Cu2+ in aqueous solution. The method for synthesis of H2L is very simple and environment friendly. This organic Schiff base probe was characterized by 1H-NMR, FT-IR and ESI-MS spectroscopy along with single-crystal XRD analysis. It exhibited binding-induced colour change with Cu2+ion from colourless to intense yellow and fluorescence enhancement. The LOD values of H2L towards Cu2+ were calculated to be 7.1 × 10−8 M (colorimetrically) and 3.8 × 10−8 M (fluorometrically). The interactions between H2L and Cu2+ were studied by Job's plot, ESI-MS, FT-IR spectroscopy and DFT calculations. The crystal structure of the L–Cu2+ adduct was also determined by single-crystal X-ray analysis, and it was found that two molecules of L coordinate with three molecules of Cu2+ ions. The receptor H2L could operate in a wide pH range and can be successfully applied for detection and quantification of Cu2+ ions in environmental samples and logic applications.

Graphical abstract: A fluorescent colorimetric vanillin di-Schiff base chemosensor for detection of Cu(ii) and isolation of trinuclear Cu(ii)–dihydrazide

Supplementary files

Article information

Article type
Paper
Submitted
22 Dec 2021
Accepted
26 Jan 2022
First published
26 Jan 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 2495-2504

A fluorescent colorimetric vanillin di-Schiff base chemosensor for detection of Cu(II) and isolation of trinuclear Cu(II)–dihydrazide

M. Sahu, A. K. Manna and G. K. Patra, Mater. Adv., 2022, 3, 2495 DOI: 10.1039/D1MA01227D

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