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  • Title: Colorimetric detection of cyanide with a chromogenic oxazine.
    Author: Tomasulo M, Raymo FM.
    Journal: Org Lett; 2005 Oct 13; 7(21):4633-6. PubMed ID: 16209497.
    Abstract:
    [reaction: see text] We have designed a chromogenic oxazine for the colorimetric detection of cyanide. Indeed, the [1,3]oxazine ring of our compound opens to form a 4-nitrophenylazophenolate chromophore in response to cyanide. This quantitative chromogenic transformation permits the detection of micromolar concentrations of cyanide in water. Furthermore, our chromogenic oxazine is insensitive to the presence of large concentrations of fluoride, chloride, bromide, or iodide anions, which are generally the principal interferents in the colorimetric detection of cyanide.
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