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Novel salicylaldehyde derivatives as fluorescence turn-on sensors for cyanide ion

Authors
Journal
Journal of Hazardous Materials
0304-3894
Publisher
Elsevier
Identifiers
DOI: 10.1016/j.jhazmat.2014.08.028
Keywords
  • Cyanide
  • Fluorescence
  • Nucleophilic Addition
  • Sensor
  • Water Analysis

Abstract

Abstract A novel series of fluorescent probes containing diphenylacetylene as fluorogenic units and salicylaldehyde as a CN− receptor were successfully synthesized by using sonogashira coupling. In the presence of Triton-X 100 non-ionic surfactant, the fluorophores exhibited fluorescence “turn-on” in response to CN− in aqueous media with the detection limit of 1.6μM. The turn-on signal is the result of the conversion of the aldehyde to cyanohydrin via the internal acid catalyzed addition of cyanide. Using paper sensor strips, a naked eye detection of cyanide is possible down to 5nmol.

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