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Freiburger Materialforschungszentrum
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You are here: Home Events Anton Kiriy "Chain-growth polycondensation - advanced tool for preparation of semiconductive polymers"

Anton Kiriy "Chain-growth polycondensation - advanced tool for preparation of semiconductive polymers"

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Leibniz-Institute for Polymer Research, Dresden

What
  • Seminar
When Jul 03, 2013
from 02:15 PM to 03:00 PM
Where Hörsaal Makromolekulare Chemie, Stefan-Meier-Str. 31, Freiburg
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(Semi)conductive/conjugated polymers attract considerable attention as promising materials for solar cells, field effect transistors, light-emitting diodes, etc. However, the properties of existing conjugated polymers that are prepared predominantly by conventional step-growth polycondensations are still far from optimal. For industrial-scale applications, conjugated polymers with controllable molecular weight, molecular weight distribution, chain-end functionality, minimum amounts of defects, and as a result, controlled and reproducible optoelectronic properties are required. In addition, new architectures of conjugated polymers are needed that predictably self-assemble into desirable nanomorphologies. Nowadays, chain-growth Kumada catalyst transfer polycondensations has become a powerful tool for the synthesis of well-defined conjugated block copolymers, conjugated polymer brushes, endfunctionalized conjugated polymers which are promising materials which might allow a higher degree of morphology control in heterojunction devices. This contribution highlights our recent progress in the development of controlled synthesis of donor-acceptor alternate copolymers. Particularly, chain-growth polymerization of a highly unusual anion-radical monomer prepared from 2,6-bis(2-bromothien-5-yl)naphthalene-1,4,5,8-tetracarboxylic-N,N’-bis(2-octyldodecyl) diimide (Br-TNDIT-Br) and activated Zn powder, will be presented. Mechanism of this polymerization and preliminary assessment of optoelectronic properties of resulting copolymers will be presented. I will further focus on extension of this method to prepare other donor-acceptor polymers - containing isoindigo, diketopyrrolopyrole and perylenebisamide units.
 

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