Line Narrowing by Multiple Pulse Techniques I. Objectives and Principles

  • U. Haeberlen
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 22)


The claim is that multiple pulse techniques are a method by which it is possible to selectively remove the effects of dipolar interactions, more specifically: homonuclear secular dipolar interactions
$${{H}_{D}}=\sum\limits_{i<k}{{{b}_{ik}}({{{\vec{I}}}^{i}}\cdot {{{\vec{I}}}^{k}}-3I_{z}^{i}I_{z}^{k})}$$
of the spins from nmr spectra of solids, while retaining the effects of other interactions, in particular chemical shifts including their anisotropic parts:
$${{H}_{C}}={{\omega }_{o}}\sum\limits_{i}{\sigma _{zz}^{(i)}}I_{z}^{i}$$
The major objectives of the experimenter are these:
  1. (1)

    Demonstration that the method works at all.

  2. (2)

    To make the experiment work better and better, that means: to strive to improve the spectral resolution, to understand what affects the resolution.

  3. (3)

    Actual measurement of chemical shift tensors.



Spin System Pulse Train Line Narrowing Multiple Pulse Anisotropic Part 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • U. Haeberlen
    • 1
  1. 1.Max Planck InstitutHeidelbergDeutschland

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