%0 Journal Article %J Science %D 2005 %T High-resolution NMR spectroscopy with a portable single-sided sensor %A Perlo, J. %A Demas, V. %A Casanova, F. %A Meriles, C. A. %A Reimer, J. %A Pines, A. %A Blumich, B. %K fields %B Science %V 308 %P 1279-1279 %8 May 27 %@ 0036-8075 %G English %U ://WOS:000229482300037 %N 5726 %M WOS:000229482300037 %! High-resolution NMR spectroscopy with a portable single-sided sensor %R Doi 10.1126/Science.1108944 %0 Journal Article %J Journal of Magnetic Resonance %D 2004 %T High-resolution NMR of static samples by rotation of the magnetic field %A Meriles, C. A. %A Sakellariou, D. %A Moule, A. %A Goldman, M. %A Budinger, T. F. %A Pines, A. %K hz %X

Mechanical rotation of a sample at 54.7degrees with respect to the static magnetic field, so-called magic-angle spinning (MAS), is currently a routine procedure in nuclear magnetic resonance (NMR). The technique enhances the spectral resolution by averaging away anisotropic spin interactions thereby producing isotropic-like spectra with resolved chemical shifts and scalar Couplings. It should be possible to induce similar effects in a static sample if the direction of the magnetic field is varied, e.g., magic-angle rotation of the B-0 field (B-0-MAS). Here, this principle is experimentally demonstrated in a static sample of solid hyperpolarized xenon at similar to3.4mT. By extension to moderately high fields, it is possible to foresee interesting applications in situations where physical manipulation of the sample is inconvenient or impossible. Such situations are expected to arise in many cases from materials to biomedicine and are particularly relevant to the novel approach of ex situ NMR spectroscopy and imaging. (C) 2004 Elsevier Inc. All rights reserved.

%B Journal of Magnetic Resonance %V 169 %P 13-18 %8 Jul %@ 1090-7807 %G English %U ://WOS:000222161900002 %N 1 %M WOS:000222161900002 %! High-resolution NMR of static samples by rotation of the magnetic field %R Doi 10.1016/J.Jmr.2004.03.023 %0 Journal Article %J Journal of the American Chemical Society %D 2003 %T High-resolution NMR correlation spectra of disordered solids %A Sakellariou, D. %A Brown, S. P. %A Lesage, A. %A Hediger, S. %A Bardet, M. %A Meriles, C. A. %A Pines, A. %A Emsley, L. %K SPECTROSCOPY %X

We show how high-resolution NMR spectra can be obtained for solids for which the spectra are normally broadened due to structural disorder. The method relies on correlations in the chemical shifts between pairs of coupled spins. It is found experimentally that there are strong correlations in the chemical shifts between neighboring spins in both phosphorus-31 and carbon-13 spectra. These correlations can be exploited not only to provide resolution in two-dimensional spectra, but also to yield "chains" of correlated chemical shifts, constituting a valuable new source of structural information for disordered materials.

%B Journal of the American Chemical Society %V 125 %P 4376-4380 %8 Apr 9 %@ 0002-7863 %G English %U ://WOS:000182003500067 %N 14 %M WOS:000182003500067 %! High-resolution NMR correlation spectra of disordered solids %R Doi 10.1021/Ja0292389 %0 Journal Article %J Chemical Physics Letters %D 2003 %T High-resolution NMR of anisotropic samples with spinning away from the magic angle %A Sakellariou, D. %A Meriles, C. A. %A Martin, R. W. %A Pines, A. %K axis %X

High-resolution NMR of anisotropic samples is typically performed by spinning the sample around an axis at the magic angle of 54.7degrees with the static magnetic field. Geometric and engineering constraints often prevent spinning at this specific angle. Implementations of magic angle field rotation are extremely demanding due to power requirements or an inaccessible geometry. We present a methodology for taking the magic out of MAS while still obtaining both isotropic and anisotropic spectral information during sample spinning or field rotation at arbitrary angles. Using projected-MAS, we obtained resolved scaled isotropic chemical shifts in inhomogeneously broadened spinning samples. Published by Elsevier B.V.

%B Chemical Physics Letters %V 377 %P 333-339 %8 Aug 15 %@ 0009-2614 %G English %U ://WOS:000184895200012 %N 3-4 %M WOS:000184895200012 %! High-resolution NMR of anisotropic samples with spinning away from the magic angle %R Doi 10.1016/S0009-2614(03)01149-7