@article {381,
	title = {NMR with a continuously circulating flow of laser-polarized Xe-129},
	journal = {Journal of Physical Chemistry B},
	volume = {103},
	year = {1999},
	note = {J Phys Chem B203HNTimes Cited:45Cited References Count:35},
	month = {Jun 3},
	pages = {4629-4637},
	abstract = {<p>In this paper we describe the construction of an apparatus for optical pumping of Xe-129 in a circulating gas system connected to a probe for static high-field NMR. The optimal working conditions for the optical pumping under flow are explored, yielding a continuous gas now with a steady-state spin-polarization of about 2\%. It is shown that on various types of high surface area materials a steady-state of adsorbed laser-polarized xenon can be;reached with polarizations of about 0.3\%. NMR spectroscopy of this layer is greatly facilitated due to the renewable magnetization under the continuous-flow conditions allowing unprecedented fast detection of two-dimensional NMR experiments with laser-polarized Xe. The steady-state spin-polarization of adsorbed Xe-129 gives rise to cross-relaxation to surface nuclei such as H-1 and Si-29. A direct spin-polarization-induced nuclear Overhauser effect (SPINOE) to heteronuclei is observed with an enhancement factor of about 20-30. A method is presented for simple modulation of the spin-polarization direction in the fringe field of the high-field magnet; this is exploited to obtain difference SPINOE spectra to highlight only the surface nuclei. Furthermore, a transfer via cross-polarization (CP) from adsorbed Xe to surface protons is demonstrated to select surface groups with reduced mobility compared to SPINOE detection.</p>
},
	keywords = {zeolites},
	isbn = {1089-5647},
	doi = {Doi 10.1021/Jp9821984},
	url = {<Go to ISI>://WOS:000080702600011},
	author = {Seydoux, R. and Pines, A. and Haake, M. and Reimer, J. A.}
}
@article {396,
	title = {NMR of supercritical laser-polarized xenon},
	journal = {Chemical Physics Letters},
	volume = {292},
	year = {1998},
	note = {Chem Phys Lett112EZTimes Cited:25Cited References Count:35},
	month = {Aug 14},
	pages = {686-690},
	abstract = {<p>The feasibility of producing supercritical laser-polarized xenon for nuclear magnetic resonance (NMR) investigations was studied. Using a high-pressure capillary tube, a supercritical xenon sample (52 degrees C, 65 atm) was produced with a Xe-129 polarization approximately 140 times the equilibrium value. The polarization was observed to last for hundreds of seconds, in agreement with previous studies. These preliminary results suggest that supercritical laser-polarized xenon may be used as a polarizing solvent for numerous NMR applications. (C) 1998 Published by Elsevier Science B.V. All rights reserved.</p>
},
	keywords = {gas},
	isbn = {0009-2614},
	doi = {Doi 10.1016/S0009-2614(98)00732-5},
	url = {<Go to ISI>://WOS:000075482300049},
	author = {Haake, M. and Goodson, B. M. and Laws, D. D. and Brunner, E. and Cyrier, M. C. and Havlin, R. H. and Pines, A.}
}
