Supramolecular chemosensor for selective detection of iron in aqueous medium |
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Authors: | Said Nadeem Burhan Khan Numan Hoda Önder Topel |
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Affiliation: | 1. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan;2. Department of Chemistry, Akdeniz University, 07058, Antalya, Turkey;3. Department of Chemistry, Akdeniz University, 07058, Antalya, Turkey |
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Abstract: | We have successfully developed a ‘turn-on’ colorimetric chemosensor for Fe3+ based on 1,10-phenanthroline. An amide derivative of 1,10-phenanthroline 4 was developed for the selective recognition of Fe3+ over Co2+, Cr3+, Cu2+, Mn2+, Ni2+, Ag+ and Zn2+ and could measure Fe3+ concentration in the range of 15–210 μM by UV–vis spectroscopy. Moreover, the addition of Fe3+ to a colourless solution of 4 turned its colour to light pink, indicating that 4 is capable of detecting Fe3+ by the naked eye. Compound 4 exhibits a major absorption band centred at 268 which shifted to 278 nm after addition of Fe3+, and a shoulder band around 514 nm was also observed. The complexation of Fe3+ with 4 was analysed at a different pH and favourable binding was observed at pH 6.2. |
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Keywords: | chemosensor 1,10-phenanthroline Fe3+ complex |
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