A Multifunctional Bimetallic Molecular Device for Ultrasensitive Detection,Naked‐Eye Recognition,and Elimination of Cyanide Ions |
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| Authors: | Dr Cheuk‐Fai Chow Dr Wing‐Leung Wong Dr Cheng‐Bin Gong |
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| Institution: | 1. Department of Science and Environmental Studies, Centre for Education in Environmental Sustainability, The Hong Kong Institute of Education, 10 Lo Ping Road, Tai Po Hong Kong SAR (P.R. China)These people contributed equally to this publication.;2. Department of Science and Environmental Studies, Centre for Education in Environmental Sustainability, The Hong Kong Institute of Education, 10 Lo Ping Road, Tai Po Hong Kong SAR (P.R. China);3. College of Chemistry and Chemical Engineering, Southwest University, Chong Qing (P.R. China) |
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| Abstract: | A new bimetallic FeII–CuII complex was synthesized, characterized, and applied as a selective and sensitive sensor for cyanide detection in water. This complex is the first multifunctional device that can simultaneously detect cyanide ions in real water samples, amplify the colorimetric signal upon detection for naked‐eye recognition at the parts‐per‐million (ppb) level, and convert the toxic cyanide ion into the much safer cyanate ion in situ. The mechanism of the bimetallic complex for high‐selectivity recognition and signaling toward cyanide ions was investigated through a series of binding kinetics of the complex with different analytes, including CN?, SO42?, HCO3?, HPO42?, N3?, CH3COO?, NCS?, NO3?, and Cl? ions. In addition, the use of the indicator/catalyst displacement assay (ICDA) is demonstrated in the present system in which one metal center acts as a receptor and inhibitor and is bridged to another metal center that is responsible for signal transduction and catalysis, thus showing a versatile approach to the design of new multifunctional devices. |
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| Keywords: | anions heterometallic complexes cyanides displacement assay multifunctional devices sensors |
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