Probing Molecular Cavities in α-Cyclodextrin Solutions by Xenon NMR

Autor: Bartik, Kristin, Luhmer, Michel, Heyes, Stephen J., Ottinger, Robert, Reisse, Jacques
Zdroj: Journal of Magnetic Resonance - Series B; November 1995, Vol. 109 Issue: 2 p164-168, 5p
Abstrakt: 129Xe NMR has been used to investigate intermolecular interactions between xenon and α-cyclodextrin in H2O and in DMSO. Nuclear Overhauser enhancement effects confirmed the formation of a xenon–cyclodextrin complex. Chemical shifts were measured in solutions containing different concentrations of α-cyclodextrin and in solutions containing linear oligosaccharides. The experimental data are interpreted on the basis of a three-site model for xenon. The binding characteristics of the xenon–cyclodextrin system, including the129Xe NMR chemical shift in the cavity and the equilibrium constants, were determined and are discussed.
Databáze: Supplemental Index