NMR Detection Using Laser-Polarized Xenon as a DipolarSensor
Hyperpolarized Xe-129 can be used as a sensor to indirectly detect NMR spectra of heteronuclei that are neither covalently bound nor necessarily in direct contact with the Xe atoms, but coupled through long-range intermolecular dipolar couplings. In order to reintroduce long-range dipolar couplings the sample symmetry has to be broken. This can be done either by an asymmetric sample arrangement, or by breaking the symmetry of the spin magnetization with field gradient pulses. Experiments are performed where only a small fraction of the available Xe-129 magnetization is used for each point, so that a single batch of xenon suffices for the point-by-point acquisition of a heteronuclear NMR spectrum. Examples with H-1 as analyte nucleus show that these methods have the potential to obtain spectra with a resolution that is high enough to determine homonuclear J couplings. The applicability of this technique with remote detection is discussed.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic EnergySciences. Materials Science and Engineering Division; Swiss NationalScience Foundation
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 878689
- Report Number(s):
- LBNL-57164; JMARF3; R&D Project: 508601; BnR: KC0203010; TRN: US200611%%396
- Journal Information:
- Journal of Magnetic Resonance, Vol. 176; Related Information: Journal Publication Date: 2005; ISSN 1090-7807
- Country of Publication:
- United States
- Language:
- English
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