期刊
TETRAHEDRON LETTERS
卷 51, 期 36, 页码 4712-4716出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2010.07.002
关键词
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资金
- Korean Government (MOEHRD) [KRF-2008-331-C00171]
- Ministry of Education, Science and Technology [2009-0093817]
- Korean Ministry of Education Science AMP
- Technology (MEST) [2008-00656]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [2008-00656] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A colorimetric sensing ensemble was prepared by mixing readily prepared adenosine triphosphate (ATP)stabilized AuNPs with Cu2+-phenanthroline complexes. The sensing mechanism of the ensemble was examined by UV-vis spectrometry and transmission electron microscopy. The studies showed that the Cu2+-phenanthroline complex was converted to free phenanthroline when exposed to cyanide anions and the free phenanthroline caused the ATP-stabilized AuNPs to aggregate, which in turn, resulted in a visible color change in the AuNP solution. The ensemble could detect cyanide ions in aqueous solution at physiological pH, either spectrophotometrically or visually, with high selectivity toward cyanide anions over a range of mono- and di-anions commonly found in biological and environmental systems. This sensing ensemble also allows a quantitative assay of the analyte in a neutral aqueous solution, down to a concentration of 10(-5) M. (C) 2010 Elsevier Ltd. All rights reserved.
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