Abstract
Here, we developed a novel isoniazid based fluorescent probe (E)-N’-(thiophen-2-ylmethylene)isonicotinohydrazide (TINH) through simple condensation reaction and employed for selective detection of Pd2+ ions with a low detection limit of 4.102 × 10–11 M. Among the many existing cations, TINH bound Pd2+ ions with an association affinity of 9.794 × 105 M−1. Adding Pd2+ ions to ligand solution increased the absorption intensity in UV–Visible and quenched the emission intensity in fluorescence spectroscopic experiments. More importantly, this TINH complexed to Pd2+ ions in 1:1 stoichiometric ratio. To evaluate the stability of complexed system, pH experiments has been performed. The binding insights among the ligand and Pd2+ ions has been confirmed by IR spectroscopic and MASS spectrometric methods. Additionally, TINH also applied to real water samples for the identification and measurement of Pd2+ ions. Hence, this system could be highly applicable for detection of Pd2+ ions in environmental and industrial samples with in low detection range.
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Acknowledgements
The authors are thankful to the Department of chemistry, Baba Mastnath University, Asthal Bohar, Rohtak and the Department of chemistry, Kurukshetra University, Kurukshetra (India), for providing spectral facilities, including NMR spectroscopy.
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Jasbir Singh: Conceptualization, Investigation, Experimental, Resources, Formal analysis; Shubham Saini: Experimental, Formal analysis & Editing; Ravish K. Chauhan: Resources, Formal analysis; Writing- Original draft preparation; Pallavi Bhardwaj: Conceptualization, Investigation, Resources, Formal analysis; Ashwani Kumar: Writing- Original draft preparation, Formal analysis; Virender: Experimental, Writing- Original draft preparation, Formal analysis.
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Singh, J., Saini, S., Chauhan, R.K. et al. An Isoniazid Based Schiff Base Sensor for Selective Detection of Pd2+ Ions. J Fluoresc (2023). https://doi.org/10.1007/s10895-023-03491-x
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DOI: https://doi.org/10.1007/s10895-023-03491-x