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A quinazolin-based Schiff-base chemosensor for colorimetric detection of Ni2+ and Zn2+ ions and 'turn-on' fluorometric detection of Zn2+ ion.

ABSTRACT: 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 1H-NMR, IR spectroscopy, ESI-MS spectrometry and theoretical studies. The receptor showed appreciable colorimetric λmax shift for both Ni2+ and Zn2+ ions and fluorometric "turn on" response in presence of only Zn2+ ion. The Jobs plot analysis revealed that receptor forms 2 : 1 complex with both the ions Ni2+ and Zn2+, further confirmed by ESI-MS analysis. The single crystal structure of L-Ni2+ complex (1) has also been determined. The colorimetric detection limits were calculated to 7.9 nM and 7.5 nM respectively for Ni2+ and Zn2+ 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.

SUBMITTER: Sharma V 

PROVIDER: S-EPMC9709804 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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A quinazolin-based Schiff-base chemosensor for colorimetric detection of Ni<sup>2+</sup> and Zn<sup>2+</sup> ions and '<i>turn-on</i>' fluorometric detection of Zn<sup>2+</sup> ion.

Sharma Vanshika V   Sahu Meman M   Manna Amit Kumar AK   De Dinesh D   Patra Goutam Kumar GK  

RSC advances 20221130 53

Herein, we have reported a novel quinazolin-based Schiff base chemosensor (<i>E</i>)-2-benzamido-<i>N</i>'-(1-(pyridin-2-yl)ethylidene)benzohydrazide (L). L has been designed, synthesised and characterised by <sup>1</sup>H-NMR, IR spectroscopy, ESI-MS spectrometry and theoretical studies. The receptor showed appreciable colorimetric <i>λ</i> <sub>max</sub> shift for both Ni<sup>2+</sup> and Zn<sup>2+</sup> ions and fluorometric "<i>turn on</i>" response in presence of only Zn<sup>2+</sup> ion. T  ...[more]

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