Elucidating the molecular and nano-scale of stimuli-responsive (bio)polymers with radicals

Dariush Hinderberger
Max-Planck-Institut für Polymerforschung
Thursday, April 12, 2012
Duke University, 115 Teer | 4:15pm

Magnetic resonance methods such as nuclear magnetic resonance (NMR) or electron paramagnetic resonance (EPR) can give valuable insights into materials that show long range disorder and some short range or intermediate range order, e.g. synthetic and biological soft matter. Here, it will be shown that methods of EPR spectroscopy on small radicals as probe molecules can help illuminating – on the molecular scale - the large and diverse variety of structure, dynamics and finally function of responsive (bio)polymers. This will be highlighted through examples that range from thermoresponsive synthetic block copolymers, via dendronized polymers to elastin-like polypeptides. Finally, the implications of the molecular and nano-scale insights will be discussed in light of the intended use of thermoresponsive polymeric systems, e.g. in the fast growing field of drug delivery.