Dr. Ulrich Scheler

• From self-diffusion measurements the hydrodynamic radius of macromolecules and complexes is derived.
• For the investigation of polyelectrolytes an electric field is introduced as an additional experimental variable.
• The design of experiment permits the separation of incoherent motion (diffusion) and coherent motion (electrophoresis).
• The effective charge, that is available for the interaction with other charged species, is directly determined.
• Binding of counterions and ligands is studied, binding mechanisms are investigated.

• Ute Böhme
• Brigitte Hänel

• BRUKER Avance 500
• BRUKER Avance 300
• Electrophoresis-NMR system
  (in-house built, +/- 1000 V)

• U. Böhme, C. Vogel, J. Meier-Haack, U.. Scheler
  Determination of Charge and Molecular Weight of Rigid-Rod Polyelectrolytes
  J. Phys. Chem. B 111 (2007), 8344 - 8347
• U. Böhme, U. Scheler
  Effective charge of polyelectrolytes as a function of the dielectric constant of a solution
  Journal of Colloid and Interface Science 309 (2007), 231 - 235
• U. Böhme, U. Scheler
  Effective charge of bovine serum albumin determined by electrophoresis
  NMRChemical Physics Letters 435 (2007), 342 - 345
• U. Scheler
  Effective Size and Charge of Polyelectrolytes in Solution
  H.S. Nalva (ed.) Handbook of Polyelectrolytes and their applications, American Scientific Publishers (2002)

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