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Two-Dimensional Solid State NMR and Separation of 7Li Quadrupolar Interactions in Paramagnetic Compounds

Ganapathy, S and Rajamohanan, PR and Ganguly, P (2000) Two-Dimensional Solid State NMR and Separation of 7Li Quadrupolar Interactions in Paramagnetic Compounds. In: Journal of Physical Chemistry A, 104 (10). pp. 2007-2012.

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Official URL: http://pubs.acs.org/doi/full/10.1021/jp9822384

Abstract

Ln layered paramagnetic compounds, such as La2Li0.5Ni0.5O4 with a perovskite structure, the Li-7 NMR spectrum is broadened by anisotropic quadrupolar as well as paramagnetic dipolar interactions. We have used a two-dimensional spin echo (SE) experiment to separate the quadrupolar interaction and obtain a clean quadrupolar spectrum along the wi dimension. This is demonstrated in La2Li0.5B0.5O4 (B = Cu, Ni), through 2D SE experiments conducted in static samples as well as those in spinning at the magic angle. A quadrupole coupling constant of 92 kHz is estimated from the Wi spectrum for paramagnetic La2Li0.5Ni0.5O4.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Sophisticated Instruments Facility
Date Deposited: 20 Nov 2009 06:59
Last Modified: 19 Sep 2010 05:01
URI: http://eprints.iisc.ernet.in/id/eprint/18313

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