Coherent Reduction of Dipolar Interactions in Molecules Dissolved in Anisotropic Media Using a New Multiple-Pulse Sequence in a COSY Experiment

A new multipulse sequence, named Flip-Flop 16, which acts coherently on the spin Hamiltonian, is described. To avoid some of the technical difficulties encountered in multipulse experiments synchronized to the sampling of the magnetization, the sequence is applied during the t 1 period of a COSY exp...

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Bibliographic Details
Published in:Journal of magnetic resonance. Series A 1994-04, Vol.107 (2), p.141-150
Main Authors: Lesot, P., Ouvrard, J.M., Ouvrard, B.N., Courtieu, J.
Format: Article
Language:English
Subjects:
Analytical chemistry
Atomic and molecular physics
Atomic, molecular and charged-particle sources and detectors
Chemical Sciences
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Molecular properties and interactions with photons
Nuclear resonance and relaxation
Physics
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Description
Summary:A new multipulse sequence, named Flip-Flop 16, which acts coherently on the spin Hamiltonian, is described. To avoid some of the technical difficulties encountered in multipulse experiments synchronized to the sampling of the magnetization, the sequence is applied during the t 1 period of a COSY experiment. A scaled spectrum thus appears in the ν 1 dimension. An experimental study is presented using a simple A 2 spin system dissolved in a nematic liquid crystal. It is then demonstrated that the technique can be used to turn an AB deceptively simple or A 3B second-order spectrum into an AX or A 3X first-order spectrum, respectively.
ISSN:1064-1858
1096-0864
DOI:10.1006/jmra.1994.1061