Solid-state NMR spectroscopy can provide valuable information
about molecular and supra-molecular structures, packing
arrangements, as well as molecular dynamics. In order to exploit
this rich potential, the development of advanced techniques and
their application is of great importance. The solid-state NMR
group therefore devotes considerable efforts to the development
and application of new methods. In the solid state, anisotropic
spin interactions such as the chemical shift anisotropy or
dipolar couplings contain unique spatial and dynamic
information. However, these interactions lead to broad and
overlapping spectral lines, which obscure the familiar isotropic
chemical information known from solution-state NMR spectroscopy.
In order to obtain high-resolution, it is necessary to remove
the broadening due to this anisotropic interactions. The most
convenient way to achieve this goal is rapid sample rotation at
the so-called “magic” angle (MAS) relative to the static
magnetic field, and at spinning speeds up