Selective Recognition of Sulfate Anions by a Cyclopeptide-Derived Receptor in Aqueous Phosphate Buffer

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• 作者：Astrid Schaly ; Raquel Belda ; Enrique Garc铆a-Espa帽a ; Stefan Kubik
• 刊名：Organic Letters
• 出版年：2013
• 出版时间：December 20, 2013
• 年：2013
• 卷：15
• 期：24
• 页码：6238-6241
• 全文大小：214K
• 年卷期：v.15,no.24(December 20, 2013)
• ISSN：1523-7052

文摘

A cyclopeptide-based anion receptor containing alternating 6-aminopicolinic acid and substituted (4R)-4-aminoproline subunits with appended 尾-alanine residues binds sulfate anions in water. Importantly, appreciable sulfate binding is even observed in phosphate buffer, hence in the presence of anions of similar structure but with a different degree of protonation. The cause for the high selectivity of this receptor is related to the mode of action of the sulfate-binding protein.