Bis(crown ethers) derived from biphenyl: extraction and electrochemical properties

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• 作者：Costero ; Ana M. ; Sanchis ; Joaquin ; Peransi ; Sergio ; Gil ; Salvador ; Sanz ; Vicente ; Domenech ; Antonio
• 关键词：Transport ; Extraction ; Complexation ; Azacrown ligands ; Electrochemistry
• 刊名：Tetrahedron
• 出版年：2004
• 期刊代码：107_00404020
• 类别：ch
• 出版时间：May 17, 2004
• 卷：60
• 期：21
• 页码：4683-4691
• 文件大小：579 K

摘要

Ligands derived from 4,4′-dinitrobiphenyl containing azacrown cavities in the 2,2′ position have been used in extraction and transport experiments. Control experiments with a system containing only one complexing cavity have demonstrated that the capability of forming a sandwich-type complex in the aforementioned ligand not only increases extraction but also the transport across a liquid membrane. Extraction studies have also shown that the complex present in the membrane has a 1:1 stoichiometry with regard to both ligands. Electrochemical studies have also been carried out. The ligand containing two complexing cavities is capable of giving rise to a 2:1 complex under electrochemical conditions.