Colorimetric detection of Fe3+ ions using Schiff base-chalcone functionalized bis(1,2,3-triazolyl-γ-propyltriethoxysilanes)

• Published in: Inorganica Chimica Acta 2021-11, Vol.527, p.120576, Article 120576
• Main Authors: Singh, Gurjaspreet, Sushma, Priyanka, Pawan, Satija, Pinky, Shilpy, Kaur, Gurpreet, Singh, Jandeep, Singh, Jasbhinder
• Format: Article
• Language: English
• Subjects: 1,2,3-Triazole; Chalcone; Chemical sensors; Chemoreceptors; Colorimetric detection; Colorimetry; Ethylenediaminetetraacetic acids; Fe3+ ions; Ferric ions; Imines; Legislation; NMR; Nuclear magnetic resonance; Organosilanes; Schiff-base; Selectivity
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2021.120576

This work involves the synthesis and characterization of Schiff base-chalcone functionalized bis(1,2,3-triazolyl-γ-propyltriethoxysilanes) 5(a-c) for the selective and sensitive colorimetric recognition of Fe3+ ions. [Display omitted] •Synthesis of Schiff base-chalcone functionalized triazole allied bis-organosilanes.•Selective and sensitive colorimetric sensing of Fe3+ ions.•The detection limit and association constant values were calculated.•The sensor showed reversible binding nature for Fe3+ ions in the presence of EDTA. The present manuscript describes the synthesis of Schiff base-chalcone functionalized bis(1,2,3-triazolyl-γ-propyltriethoxysilanes) 5(a-c) by utilizing highly efficient “Click Silylation” strategy and their structural characterizations by multiple spectroscopic techniques like IR, NMR (1H and 13C), TGA and mass spectroscopy (ESI-QTOF). The absorption study of the synthesized chemosensors 4a and 5a revealed their high selectivity towards the colorimetric detection of Fe3+ ions without any interference from different metal ions. The sensors also showed reversible behaviour upon the addition of EDTA. Furthermore, the limit of detection and association constant values were calculated for both the chemosensors by plotting the linear calibration curve and BH-plot respectively. The detection limit obtained with sensor 5a for Fe3+ ions was 0.1874 × 10−6 M which is below the WHO and European legislation guidelines which suggest that the sensor 5a may be used for industrial and biological purposes.