Studies on inclusion complexes of calix[4]arenes capped by diamide bridges with small organic molecules

✍ Scribed by Barbara Balázs; Alajos Grün; István Bitter; Gábor Tóth

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 278 KB
• Volume: 46
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.2233

✦ Synopsis

Abstract

The inclusion of small neutral organic guests (acetonitrile, toluene, pyrazine, butylamine, nitromethane) by cyclic calix[4]arene diamide receptors was studied by ^1^H NMR spectroscopy. The binding constants determined by ^1^H NMR titration, and the results obtained by T~1~ relaxation measurements and DOSY confirm the importance of the acidity of the CH bond of the guests and highlight the role of steric interactions including conformational properties of the receptors in the recognition process. Copyright © 2008 John Wiley & Sons, Ltd.