Highly sensitive detection of mercury (II) in aqueous media by tetraphenylporphyrin with a metal ion receptor |
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| Authors: | Qianni Guo Qingbin Zeng Xiaoxiao Zhang |
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| Institution: | Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P.R. China |
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| Abstract: | We provide a highly sensitive and selective assay to detect Hg2+ in aqueous solutions using a novel β-functionalised porphyrin-based chemosensor 5 at room temperature. The binding properties of the chemosensor 5 for cations were examined by UV–vis spectroscopy and 1H NMR. The results indicate that a 1:1 stoichiometric complex is formed between chemosensor 5 and mercury (II) ion. The recognition mechanism between chemosensor 5 and metal ion was discussed based on their absorbance changes and the chemical shift changes when they interact with each other. Control experiments revealed that chemosensor 5 has a selective response to mercury (II) ion compared with other metal ions. |
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| Keywords: | porphyrin chemosensor mercury relaxivity |
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