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IRTG / Soft Matter Science
Freiburger Materialforschungszentrum
Stefan-Meier-Str. 21
79104 Freiburg, Germany

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You are here: Home Events Prof. Christopher Barner-Kowollik "Macromolecular Material Design via Modular Synthetic Strategies"

Prof. Christopher Barner-Kowollik "Macromolecular Material Design via Modular Synthetic Strategies"

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Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Germany

What
  • Seminar
When Oct 26, 2011
from 02:15 PM to 03:00 PM
Where “Hörsaal Makromolekulare Chemie”, Stefan-Meier-Str. 31, Freiburg
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The present lecture will describe how modular synthetic strategies in polymer chemistry can be employed to not only construct highly defined complex macromolecular architectures, yet also be used in applications ranging from bonding/debonding on demand networks to nano‐porous material design and switchable interfaces. The specific chemistries to be addressed include fast, quantitative and mild ligation via (hetero) Diels‐Alder chemistries, mechanistic switches from living radical protocols to ring opening polymerization, spin trap systems as well as the use of efficient photo‐chemistries to ligate variable enes and dienes (including biomarkers) in a spatially resolved fashion. It will be demonstrated how the reversibility of pericyclic reactions (‘dynamic covalent chemistry’) can be employed to periodically alter the physical characteristics of macromolecular materials with regard to intrinsic viscosity, color, configuration as well as micro‐ and nano‐structure. The modification of nano‐objects – including fullerenes and singlewalled carbon‐nanotubes – via pericyclic reactions will additionally be addressed. Moreover, the use of modular ligation for the build‐up of highly defined alpha,beta,gamma,omega‐mutually H‐orthogonaldonor/acceptor systems for single chain assembly emulating the folding behavior of biomacromolecules will be highlighted, showing a possible pathway for the construction of entirely synthetic protein‐mimicking entities. The synthetic efforts will be underpinned by the in‐depth characterization of the obtained macromolecules via hyphenated techniques including SEC‐ESI‐MS and LACCC‐SEC.

 

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