High-resolution NMR of anisotropic samples with spinning away from the magic angle

Journal Article · Mon Mar 31 04:00:00 EST 2003 · Chemical Physics Letters

DOI:https://doi.org/10.1016/S0009-2614(03)01149-7· OSTI ID:823204

Sakellariou, Dimitris ^[1]; Meriles, Carlos A; Martin, Rachel W; Pines, Alexander

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1. LBNL Library

High-resolution NMR of samples in the solid state is typically performed under mechanical sample spinning around an axis that makes an angle, called the magic angle, of 54.7 degrees with the static magnetic field. There are many cases in which geometrical and engineering constraints prevent spinning at this specific angle. Implementations of in-situ and ex-situ magic angle field spinning might be extremely demanding because of the power requirements or an inconvenient sample size or geometry. Here we present a methodology based on switched angle spinning between two angles, none of which is the magic angle, which provide both isotropic and anisotropic information. Using this method, named Projected Magic Angle Spinning, we were able to obtain resolved isotropic chemical shifts in spinning samples where the broadening is mostly inhomogeneous.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Basic Energy Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 823204
• Report Number(s): LBNL--52416
• Journal Information: Chemical Physics Letters, Journal Name: Chemical Physics Letters Journal Issue: 3-4 Vol. 377; ISSN CHPLBC; ISSN 0009-2614
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL SHIFT
GEOMETRY
MAGNETIC FIELDS
NMR PROJECTED MAGIC ANGLE SPINNING