Heteronuclear dipolar recoupling in liquid crystals and solids by PISEMA-type pulse sequences.
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.
Dvinskikh
Sergey V
SV
Division of Physical Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden. sergey@physc.su.se
Zimmermann
Herbert
H
Maliniak
Arnold
A
Sandström
Dick
D
D000409:Alanine / Q000737:chemistry; D000465:Algorithms; D016880:Anisotropy; D000880:Anthraquinones / Q000737:chemistry; D002247:Carbon Isotopes; D003198:Computer Simulation; D003461:Crystallography / Q000379:methods*; D005998:Glycine / Q000737:chemistry; D008958:Models, Molecular; D009587:Nitrogen Isotopes; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D012996:Solutions / Q000737:chemistry
D000880:Anthraquinones; D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D012996:Solutions; C103273:rufigallol; D000409:Alanine; D005998:Glycine