Strong and Selective Anion Binding within the Central Cavity of Molecular Knots and Links

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• 作者：Jean-Fran莽ois Ayme ; Jonathon E. Beves ; Christopher J. Campbell ; Guzm谩n Gil-Ram铆rez ; David A. Leigh ; Alexander J. Stephens
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：August 12, 2015
• 年：2015
• 卷：137
• 期：31
• 页码：9812-9815
• 全文大小：405K
• ISSN：1520-5126

文摘

A molecular pentafoil knot and doubly and triply entwined [2]catenanes based on circular Fe(II) double helicate scaffolds bind halide anions in their central cavities through electrostatic and CH路路路X^{鈥?/sup> hydrogen-bonding interactions. The binding is up to (3.6 卤 0.2) 脳 1010 M鈥? in acetonitrile (for pentafoil knot [2路Cl](PF₆)₉), making these topologically complex host molecules some of the strongest synthetic noncovalent binders of halide anions measured to date, comparable in chloride ion affinity to silver salts.}