A multi-channel sensor based on 8-hydroxyquinoline ferrocenoate for probing Hg(II) ion |
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| Authors: | Shi Lei Song Wei Li Yang Li Da-Wei Swanick Kalen N Ding Zhifeng Long Yi-Tao |
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| Institution: | a Shanghai Key Laboratory of Functional Materials Chemistry & Department of Chemistry, East China University of Science and Technology, 200237, Shanghai, PR China
b Department of Chemistry, The University of Western Ontario, London, ON, Canada N6A 5B7 |
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| Abstract: | A new sensing molecule 8-hydroxyquinoline ferrocenoate (Fc-Q) which combines ferrocene and 8-hydroxyquinoline moieties was synthesized and applied as a multi-channel sensor for the detection of Hg2+ ion. Fc-Q can coordinate with Hg2+ to give colorimetric, fluorescent and electrochemical responses. Upon complexation with Hg2+ ion, the characteristic absorption peak is red-shifted (Δλ = 45 nm), the fluorescent intensity is quenched at 303 nm, and the oxidation peak is cathodic shifted (ΔE1/2 = −149 mV). Quantitatively analyzed Hg2+ ions at the range of ppb level could be achieved by electrochemical response. For the practical application of sensing Hg2+ in real world water, Fc-Q modified screen-printed carbon electrodes were obtained for facile, sensitive, and on-site analysis of Hg2+. |
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| Keywords: | Multi-channel sensor Ferrocene 8-Hydroxyqinoline Screen-printed carbon electrode |
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