A Calix[4]imidazolium[2]pyridine as an Anion Receptor

Abstract

An effective macrocyclic ionophore for F− ions that contains an array of positively charged imidazolium units has been prepared. The calix[4]imidazolium[2]pyridine cation formed a complex with F− ions in a 1:1 stoichiometry, as shown by binding studies using 1H NMR spectroscopic analysis, X-ray crystallographic determination (see structure), and density functional calculations. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2005/z500119_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.