Synthesis,characterization and applications of schiff base chemosensor for determination of Cu2+ ions |
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Institution: | 1. Department of Chemistry, University of Malakand, Khyber Pakhtunkhwa, Pakistan;2. Department of Chemistry, University College in Al-Jamoum, Umm Al-Qura University, 21955 Makkah, Saudi Arabia;3. Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia;4. Department of Chemistry, College of Sciences & Arts, King Abdulaziz University, Rabigh, Saudi Arabia |
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Abstract: | A novel thiazole-based Schiffbase chemosensor SB1 with N- and O- donor atoms was synthesized and characterized by different techniques (UV–vis, 13C NMR, 1H NMR, and FT-IR analysis). The chemosensor SB1 was used for the determination of Cu2+ ions in various samples. The significant spectral changes in absorption spectra of chemosensor SB1 at 220 and 416 nm and the color change from light yellow to yellowish-brown indicate high selectivity and sensitivity towards Cu2+ ions as compared to other cations (Na+, K+, Ag+, Zn2+, Ni2+, Pb2+, Mn2+, Mg2+, Co2+, Cd2+, Sn2+, Hg2+, Cr3+, Fe3+, and Al3+). The sensing mechanism of SB1 was investigated through various techniques such as FT-IR, UV–vis and 1H NMR titration experiment and further confirmed by DFT computational studies. The 2:1 binding mode between SB1 and Cu2+ ions was confirmed by Job‘s plot using UV–vis spectrophotometry. The limit of detection (LOD) and limit of quantification (LOQ) were found to be 0.015 and 0.0471 µg mL?1, respectively. The percent recovery of Cu2+ from various environmental samples was found to be 95.00–103.33% at various levels. These obtained results demonstrate that chemosensor SB1 is a cost-effective, facile, selective, sensitive, and colorimetric sensing platform to detect trace amounts of Cu2+ ions in variousenvironmental and agricultural samples. |
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Keywords: | Chemosensor UV–Visible spectroscopy Limit of detection Colorimetric Cost-effective |
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