NMR Detection Using Laser-Polarized Xenon as a DipolarSensor

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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 ... continued below

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Granwehr, Josef; Urban, Jeffry T.; Trabesinger, Andreas H. & Pines, Alexander February 28, 2005.

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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.

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  • Journal Name: Journal of Magnetic Resonance; Journal Volume: 176; Related Information: Journal Publication Date: 2005

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  • Report No.: LBNL--57164
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 878689
  • Archival Resource Key: ark:/67531/metadc877421

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  • February 28, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 29, 2016, 3:40 p.m.

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Granwehr, Josef; Urban, Jeffry T.; Trabesinger, Andreas H. & Pines, Alexander. NMR Detection Using Laser-Polarized Xenon as a DipolarSensor, article, February 28, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc877421/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.