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Measurement of transverse relaxation in coupled spin systems by semi-selective refocusing: Evidence for interference of CSA and dipolar relaxation

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Abstract

A novel spin-echo experiment is proposed that uses semiselective Gaussian pulse cascades for refocusing in systems with homonuclear couplings. The experiment allows one to obtain evidence of differential T2 effects due to cross-correlation of proton chemical shift anisotropy and proton-proton dipolar interactions in a small aromatic compound at 9.4 T. The spin-echo experiment is also applied to measure transverse relaxation rates for selected multiplets of the cyclic undecapeptide cyclosporin. Possible extensions to multiple-quantum spin echo-spectroscopy are indicated.

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Author notes

  1. J. Kowalewski

    Present address: Division of Physical Chemistry, Arrhenius Laboratory, University of Stockholm, Stockholm, Sweden

Authors and Affiliations

  1. Section de Chimie, Université de Lausanne, Rue de la Barre 2, CH 1005, Lausanne, Switzerland

    L. Emsley, J. Kowalewski & G. Bodenhausen

Authors
  1. L. Emsley
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  2. J. Kowalewski
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  3. G. Bodenhausen
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Emsley, L., Kowalewski, J. & Bodenhausen, G. Measurement of transverse relaxation in coupled spin systems by semi-selective refocusing: Evidence for interference of CSA and dipolar relaxation. Appl Magn Reson 1, 139–147 (1990). https://doi.org/10.1007/BF03166151

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  • DOI: https://doi.org/10.1007/BF03166151

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