https://doi.org/10.1007/s100530070024
Direct evidence of a magnetization transfer between laser-polarized xenon and protons of a cage-molecule in water*
1
Service de Chimie Moléculaire,
CEA/Saclay,
91191 Gif-sur-Yvette Cedex, France
2
Service de Physique de l'État Condensé,
CEA/Saclay,
91191 Gif-sur-Yvette Cedex, France
Received:
16
March
2000
Revised:
22
May
2000
Published online: 15 November 2000
In a dedicated experimental setup, we directly prepare liquid-state NMR samples containing laser-polarized xenon with nuclear polarization larger than 5% at pressures up to 4 bars. Coating of the NMR tube surface allows us to increase the self-relaxation time of xenon in the gaseous phase to approximately 4.5 hours. Using a modified SPINOE pulse sequence, we present the first direct detection of a regioselective proton signal enhancement of a molecule -cyclodextrin) dissolved in water resulting from cross-polarization between laser-polarized xenon and protons.
PACS: 76.60.-k – Nuclear magnetic resonance and relaxation / 32.80.Bx – Level crossing and optical pumping / 87.15.-v – Biomolecules: structure and physical properties
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000