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  • Title: A simple colorimetric chemosensor bearing a carboxylic acid group with high selectivity for CN-.
    Author: Park GJ, Choi YW, Lee D, Kim C.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2014 Nov 11; 132():771-5. PubMed ID: 24971717.
    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.
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