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Heteronuclear dipolar recoupling in liquid crystals and solids by PISEMA-type pulse sequences
Sergey V Dvinskikh1, Herbert Zimmermann, Arnold Maliniak
1Division of Physical Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden. sergey@physc.su.se
Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|August 23, 2003
Abstract:
A pulse sequence is described for the recoupling of heteronuclear dipolar interactions under MAS. The method is similar to the PISEMA experiment, but employs a well-defined amplitude modulation of one of the two radio-frequency fields. The technique is used for measurements of 1H-13C dipolar couplings in unoriented solid and liquid-crystalline samples.