Recent  

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.

Deuterium Metabolic Imaging (DMI) is a novel method to obtain images of dynamic metabolism in the living human brain. While DMI is generally simple and robust, small signals from deuterated skull lipids can distort the metabolic information within the brain. Here we use MRI-based information on brain and skull locations to remove lipid signals from DMI data. With an average 90 % lipid removal, DMI is used to generate distinct and artifact-free metabolic maps on patients with brain tumors.

In nuclear magnetic resonance, the magnetization of abundantly present nuclei contributes to the overall field felt by the same nuclei through intermolecular dipolar interactions. This has led to many surprising discoveries, such as multiple spin echoes and intermolecular cross-peaks in 2D spectroscopy. In this work, the effect of the dipolar field under continuous irradiation is investigated. Various methods to obtain intermolecular transfer of phase coherences are presented.

We recently freed the solid effect of dynamic nuclear polarization (DNP) from its classical, perturbative treatment by describing the relevant spin dynamics in time domain. This allows us to easily account for dynamical processes that modulate the spin interactions in liquids. Here we model the slow rotational diffusion of the polarizing agent, in addition to the translational diffusion of the spins described previously, and analyze DNP data from nitroxide spin-labels in lipid bilayers at 9.4 T.