A multifunctional bimetallic molecular device for ultrasensitive detection, naked-eye recognition, and elimination of cyanide ions

Cheuk Fai Stephen CHOW, Pui-Yu HO, Wing Leung WONG, Cheng-Bin GONG

Research output: Contribution to journalArticle

10 Citations (Scopus)

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. Copyright © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)12984-12990
JournalChemistry - A European Journal
Volume21
Issue number37
Early online dateJul 2015
DOIs
Publication statusPublished - Sep 2015

Fingerprint

Cyanides
Ions
Metals
Cyanates
Signal transduction
Water
Poisons
Signal detection
Catalysis
Assays
Catalysts
Kinetics
Sensors

Bibliographical note

Chow, C.-F., Ho, P.-Y., Wong, W.-L., Gong, C.-B. (2015). A multifunctional bimetallic molecular device for ultrasensitive detection, naked-eye recognition, and elimination of cyanide ions. Chemistry - A European Journal, 21(37), 12984-12990.

Keywords

  • Anions
  • Heterometallic complexes
  • Cyanides
  • Displacement assay
  • Multifunctional devices
  • Sensors