Martin Luther University Halle-Wittenberg


Institute of Physics - NMR group

phone: +49 (0) 345 55 28551

Betty-Heimann-Str. 7
06120 Halle (Saale)

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Current Projects and Collaborations

Prof. Dr. Kay Saalwächter

see also: Forschungsportal Sachsen-Anhalt

Current projects:

Dr. Alexey Krushelnitsky

  • Rocking motion in solid proteins as studied by solid-state NMR techniques (KR3033/1-1), DFG project.

Dr. Tiago Ferreira

  • Crystallization of polymer chains under anisotropic confinement in liquid crystals, project B16 of the CRC TRR 102 "Polymers under multiple constraints".
  • NMR methods for order-parameter determination in lipid membranes
  • NMRlipids projekt: Open Collaboration to understand lipid systems in atomistic resolution, managed by O. H. Samuli Ollila (Inst. of Biotechnology, U Helsinki) and Markus S. Miettinen (MPI of Colloids and Interfaces, Germany)

Prof. Dr. Detlef Reichert

Dr. Günter Hempel

  • Segmental orientation in cold-drawn glassy polymers, unfunded collaboration with Dr. Paul Sotta (INSA-IMP, Lyon). This will be a part of the project "Physics of strain hardening in glassy polymers" of Prof. Kay Saalwächter.
  • Simplification of calculations of MAS-NMR signals. A set of polynomials were derived by which sideband intensities and time-domain signals can be calculated very simply in comparison to formerly-known numerical algorithms. FID and spectra of related experiments can be predicted by modifications of this approach.
  • Mathematical aspects of time evolution of NMR signals under MAS. Corresponding to the Liouville-von Neumann equation, the time evolution of the density matrix is described by systems of linear differential equations with non-constant coefficients. Analytical solutions cannot be obtained in the general case. Numerical procedures are known which however in some cases do not give accurate results, for example close to the so-called recoupling condition. Aim of this work is to improve the appoximations or - if possible for a particular case - obtain an analytical solution.