title: Protons as the triggers to regulate hydrogen-bonding receptors.
abstract: [reaction: see text] The protonation of alkylamines in two novel receptors results in intramolecular host-guest associations between the resulting ammonium ions and crown ether macrocycles. These interactions result in conformational changes of the receptors and prevent them from acting as hydrogen bond complements for uracil and carboxylate guest species.
authors.affiliation: Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2.
authors.forename: Mohammad H
authors.initials: MH
authors.lastname: Al-Sayah
authors.forename: Neil R
authors.initials: NR
authors.lastname: Branda