A Calix[5]arene‐Based Heterotetratopic Host for Molecular Recognition of Long‐Chain, Ion‐Paired α,ω‐Alkanediyldiammonium Salts

Abstract

The anions went in two by two: Separate ion-pair binding of nano-sized α,ω-alkanediyldiammonium dichloride salts is achieved in organic media with high efficiency and selectivity by a heterotetratopic receptor that comprises two converging calix[5]arene units to tightly encapsulate the linear dication, as well as two ureido side functions to simultaneously bind the chloride counteranions through hydrogen bonding (see picture). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2005/z500985_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.