Colorimetric and Fluorescent Signaling of Au3+ by Desulfurization of Thiocoumarin

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• 作者：Ji Eun Park ; Myung Gil Choi ; Suk-Kyu Chang
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：March 5, 2012
• 年：2012
• 卷：51
• 期：5
• 页码：2880-2884
• 全文大小：328K
• 年卷期：v.51,no.5(March 5, 2012)
• ISSN：1520-510X

文摘

We investigated the chemosignaling of Au³⁺ by the selective desulfurization of thiocoumarin. In the presence of a heavy metal ion chelator N,N,N鈥?N鈥?tetrakis-(2-pyridylmethyl)ethylenediamine, thiocoumarin was selectively converted to its oxo analogue by reaction with Au³⁺, resulting in a pronounced chromogenic and fluorescent signaling. Selective signaling of Au³⁺ was possible in the presence of common alkali, alkaline earth, and transition metal ions, as well as Au⁺ in a mixed aqueous environment. The colorimetric determination of Au³⁺ was possible by the color change from pink to yellowish green of the designed probe. The detection limit for the determination of Au³⁺ in 50% aqueous acetonitrile was 1.1 脳 10^鈥? M.