Selective Sensing of Sulfate in Aqueous Solution Using a Fluorescent Bis(cyclopeptide)

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• 作者：Carsten Reyheller ; Stefan Kubik
• 刊名：Organic Letters
• 出版年：2007
• 出版时间：December 6, 2007
• 年：2007
• 卷：9
• 期：25
• 页码：5271 - 5274
• 全文大小：100K
• 年卷期：v.9,no.25(December 6, 2007)
• ISSN：1523-7052

文摘

ABLE>Fluorescence of a bis(cyclopeptide) in which two cyclohexapeptide moieties with alternating L-proline and 6-aminopicolinic acid subunits areattached to a 4,4'-bis(dimethylamino)biphenyl linker is quenched in 1:1 (v/v) water/methanol in the presence of sulfate. Of eight other anionstested, none produced a similar effect. This bis(cyclopeptide) allows the qualitative and quantitative detection of sulfate even in the presenceof an excess of chloride anions. Calculations provided insight into the causes of fluorescence quenching and anion selectivity.