Selective colorimetric assay of cyanide ions using a thioamide-based probe containing phenol and pyridyl groups
- 주제(키워드) Colorimetric sensor , Cyanide ion , Phenol , Pyridyl , Deprotonation
- 등재 SCIE, SCOPUS
- 발행기관 PERGAMON-ELSEVIER SCIENCE LTD
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000114354
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.tetlet.2014.09.049
초록/요약
The selective assay of cyanide ions with a thioamide compound (HNPTU) containing phenol and pyridine as a chemosensor is reported using absorbance changes in a buffered aqueous solution (50 mM HEPES, pH 7.4) containing ethanol. Upon treatment with cyanide ions, the colorless solution of HNPTU turned yellow. No significant changes were observed with other comparable anions, such as F-, CI-, Br-, I-, and CH3COO-. The color change of HNPTU upon treatment with CN- was maintained even in the presence of the comparable monovalent anions. The complex stability constant (K-a = 2.6 x 10(3)) for the stoichiometric 1:1 complexation of HNPTU with cyanide ions was obtained based on absorbance titrations. The interaction of HNPTU with cyanide ions was proposed to be deprotonation, as shown by NMR and Cu(II) treatment experiments. (C) 2014 Elsevier Ltd. All rights reserved.
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