Investigations of metal–organic frameworks are presented. This substance class is of interest for applications in gas storage (hydrogen, methane), separation, catalysis, and sensor technology. The properties of the material depend on the mobility of alkyl or alkyloxy side chains. We have determined that the side-chain methylene groups move highly anisotropically with a relatively short correlation time. Furthermore, we could improve the analysis procedure for the experiment used here.

R-proton-detected local-field NMR is a powerful method to obtain structural information from biological membrane models. However, the conventional analysis of experiments, by using a Fourier transform in the indirect time-domain and reading-off splittings, is unsuitable to investigate complex systems. One then needs to model the experimental data. Fitting the experimental data with simulations that account for radiofrequency field inhomogeneity enables accurate modeling of R-PDLF data.

We develop an exact analytical description of spinning sideband intensities in magic-angle spinning NMR, e.g., for 13C CSA. This can be used in spectral fitting to obtain tensor parameters and plays out its advantage in the analysis of orientation effects in non-isotropic samples. We present an improved approach to process data obtained with the simple syncMAS experiment, which is powerful but not very popular due to the as yet not very transparent and difficult data analysis.