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A quinazolin-based Schiff-base chemosensor for colorimetric detection of Ni(2+) and Zn(2+) ions and ‘turn-on’ fluorometric detection of Zn(2+) ion

Herein, we have reported a novel quinazolin-based Schiff base chemosensor (E)-2-benzamido-N′-(1-(pyridin-2-yl)ethylidene)benzohydrazide (L). L has been designed, synthesised and characterised by (1)H-NMR, IR spectroscopy, ESI-MS spectrometry and theoretical studies. The receptor showed appreciable c...

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Detalles Bibliográficos
Autores principales: Sharma, Vanshika, Sahu, Meman, Manna, Amit Kumar, De, Dinesh, Patra, Goutam Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9709804/
https://www.ncbi.nlm.nih.gov/pubmed/36545589
http://dx.doi.org/10.1039/d2ra05564c
Descripción
Sumario:Herein, we have reported a novel quinazolin-based Schiff base chemosensor (E)-2-benzamido-N′-(1-(pyridin-2-yl)ethylidene)benzohydrazide (L). L has been designed, synthesised and characterised by (1)H-NMR, IR spectroscopy, ESI-MS spectrometry and theoretical studies. The receptor showed appreciable colorimetric λ(max) shift for both Ni(2+) and Zn(2+) ions and fluorometric “turn on” response in presence of only Zn(2+) ion. The Jobs plot analysis revealed that receptor forms 2 : 1 complex with both the ions Ni(2+) and Zn(2+), further confirmed by ESI-MS analysis. The single crystal structure of L–Ni(2+) complex (1) has also been determined. The colorimetric detection limits were calculated to 7.9 nM and 7.5 nM respectively for Ni(2+) and Zn(2+) in methanol–Tris–HCl buffer medium (10 mM, pH 7.2, 1 : 1 v/v). The chemosensor L can be applied for the recovery of contaminated water samples.