International Journal of Environmental Analytical Chemistry
International Journal of Environmental Analytical Chemistry
3 years ago

N'-(4-(diethylamino)-2-hydroxybenzylidene) isonicotinohydrazide based chemosensor for nanomolar detection of Ni(II) ion

Nilima Patil, R. B. Dhake, Umesh Fegade, Kannan Gokulakrishnan, Chennan Ramalingan, Inamuddin, Tariq Altalhi, Suvardhan Kanchi
A novel Schiff base, N'-(4-(diethylamino)-2-hydroxybenzylidene) isonicotinohydrazide (S1) was synthesised by the condensation reaction between isonicotinohydrazide and 4-(diethylamino)-2-hydroxybenzaldehyde. The chemo-sensing behaviour of S1 towards Ni2+ was investigated and confirmed that the S1 exhibited fair selectivity and sensitivity. Furthermore, it was noted that there was no significant effect of co-existing cations and anions on the detection of Ni2+. The complexation ratio of S1 and Ni2+ was confirmed as 1:1 with Jobs continuous variation method and two isosbestic points on absorption titration further supported by DFT calculations. The binding constant (Kb) for S1+Ni2+ was calculated as 22,769 M−1 and 22,134 M−1. Moreover, the obtained limit of detection (LOD) for Ni2+ was found to be 375 nM. Finally, chemosensing applications of S1 as a paper test strip kit in the environmental monitoring assessment laboratory for the recovery of Ni2+ from real water samples were successfully designed and evaluated.

Publisher URL: https://www.tandfonline.com/doi/full/10.1080/03067319.2021.1967339

DOI: 10.1080/03067319.2021.1967339

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