Magic-angle turning with double acquisition.
The double-acquisition scheme for efficient data collection of hypercomplex data (the States method) of a two-dimensional experiment is adopted to magic-angle hopping (MAH) and magic-angle turning (MAT) experiments, which are powerful methods to measure the principal values of the chemical shift anisotropy (CSA) in a powder sample. It is shown that the double acquisition MAT (DAMAT) sequence realizes the S/N ratio comparable to or better than those of other variants of the MAH/MAT sequences. In addition, we show that DAMAT has preferable features that there are no spinning sidebands in the indirect dimension, and no spectral shearing is necessary.
Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan.
Tatsuya
T
Matsunaga
Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan. Electronic address: takeyan@kuchem.kyoto-u.ac.jp.
K
K
Takegoshi
Double acquisition; High resolution solid state NMR; Magic-Angle Turning (MAT)