A simple colorimetric chemosensor bearing a carboxylic acid group with high selectivity for CN-

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Abstract

A new simple 'naked eye' chemosensor 1 (sodium (E)-2-((2-(3-hydroxy-2- naphthoyl)hydrazono)methyl)benzoate) has been synthesized for detection of CN- in a mixture of DMF/H2O (9:1). The sensor 1 comprises of a naphthoic hydrazide as efficient hydrogen bonding donor group and a benzoic acid as the moiety with the water solubility. The receptor 1 showed high selectivity toward cyanide ions in a 1:1 stoichiometric manner, which induces a fast color change from colorless to yellow for CN- over other anions. Therefore, receptor 1 could be useful for cyanide detection in aqueous environment, displaying a high distinguishable selectivity from hydrogen bonded anions and being clearly visible to the naked eye.

Original languageEnglish
Pages (from-to)771-775
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume132
DOIs
StatePublished - 11 Nov 2014

Keywords

  • Carboxylic acid
  • Colorimetric
  • Cyanide
  • Deprotonation
  • Naphthoic hydrazide

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