Transverse magnetization transfer under planar mixing conditions in spin systems consisting of three coupled spins 1/2

Burkhard Luy, Steffen J. Glaser

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Polarization transfer under planar mixing conditions is a widely used tool in modern NMR-experiments. In the case of two coupled spins 1/2 or a chain of three or more spins 1/2 with only nearest neighbor couplings, it is only possible to transfer a single magnetization component (longitudinal magnetization in the principle axis system of the planar coupling tensors). However, if all couplings in a three-spin system are non-zero, it turns out that all magnetization components can be efficiently transferred even under strictly planar mixing conditions. In this article a detailed theoretical analysis is presented based on analytical transverse coherence transfer functions and on the underlying commutator algebra. In addition, transverse magnetization transfer is demonstrated experimentally. The results show that in highly coupled spin systems, as for example in the case of partially aligned samples with many residual dipolar couplings, special care has to be taken to avoid phase distortions if planar mixing steps are used.

Original languageEnglish
Pages (from-to)304-309
Number of pages6
JournalJournal of Magnetic Resonance
Volume164
Issue number2
DOIs
StatePublished - Oct 2003

Keywords

  • Analytical transfer functions
  • Hartmann-Hahn transfer
  • Planar mixing
  • Residual dipolar couplings

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