title: Optimizing STMAS.
abstract: The 2D satellite transition magic angle spinning (STMAS) experiment generates efficiently high-resolution isotropic NMR spectra of half-integer quadrupolar nuclei. The experiment involves excitation and coherence transfer of satellite transitions into the central transition. It requires efficient refocusing of satellite transitions and sample spinning at a very accurate magic angle to cancel the first-order quadrupolar interaction effect. A review of all parameters relevant to optimizing the STMAS experiment is presented, including pulse sequence calibration, regulating spinning speed, magic angle adjustment, optimization of satellite transition excitation, and coherence transfer for both I = 3/2 and I > or =5/2 nuclei.
authors.affiliation: RMN et Chimie du Solide, FRE 2423 Tectonique Moléculaire du Solide ULP-CNRS, University Louis Pasteur, 4 Rue Blaise Pascal, 67070 Strasbourg Cedex, France.
authors.forename: Clarisse
authors.initials: C
authors.lastname: Huguenard
authors.forename: Francis
authors.initials: F
authors.lastname: Taulelle
authors.forename: Benno
authors.initials: B
authors.lastname: Knott
authors.forename: Zhehong
authors.initials: Z
authors.lastname: Gan
mesh_terms: D002138:Calibration; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013431:Sulfates / Q000737:chemistry*
chemical_list: D013431:Sulfates; C012036:sodium sulfate