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New aspects of spin diffusion and cross relaxation in solid-state NMR

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Müller,  Andreas
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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Zimmermann,  Herbert
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;

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Haeberlen,  Ulrich
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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Citation

Müller, A., Zimmermann, H., & Haeberlen, U. (1997). New aspects of spin diffusion and cross relaxation in solid-state NMR. Journal of Magnetic Resonance, 126(1), 66-78. doi:10.1006/jmre.1997.1132.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-21D1-1
Abstract
Theoretical models for motionally driven spin diffusion are compared and applied to spinsS= 12 andS= 1. Their predictions are quantitatively corroborated by experiments on a single crystal of deuterated biphenyl. In this system, a molecular flip process drives spin diffusion and makes it strongly temperature dependent. In the second part, it is shown how spin diffusion of quadrupolar order degenerates into cross relaxation. A single crystal of partially deuterated durene provides a clear-cut example of cross relaxation in a dipolar coupled pair of spinsS= 1. This observation explains why, in solids, the relaxation time of quadrupolar order,T1Q, is often much shorter thanT1.