Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 3: Organic Electronics and Photovoltaics - Layer Morphology and Molecular Aggregation
CPP 3.7: Vortrag
Montag, 12. März 2018, 11:30–11:45, C 243
Orientation and Order Bottle Brush Copolymers — •Arthur Markus Anton1, Christian David Heinrich2, Mukundan Thelakkat2, and Friedrich Kremer1 — 1Peter Debye Institut for Soft Matter Physics, Leipzig University — 2Macromolecular Chemistry I, University of Bayreuth
Compared to linear polymers bottle brush copolymers provide advantages, such as higher chain mobility or increased persistence length.
Concerning this, a protocol on the preparation of brush copolymers containing electronically active poly(3-hexylthiophene) (P3HT) segments in their side chains has recently been published [1]. With rising side chains length highly crystalline materials are obtained; lamellar crystals have been observed for the first time in the case of brush copolymers. Moreover, the charge carrier mobility in brushes is comparable to linear P3HT, whereas the brushes’ excellent thermal stability gives rise to further applications [1].
To analyze the molecular organization in the P3HT bottle brush films infrared transition moment orientational analysis (IR-TMOA) is employed [2,3]. The spectral absorption is recorded depending on the polarization and in addition on the inclination of the sample film relative to the incident light. This enables to determine
the spatial orientation and order of particular molecule segments.
While linear P3HT exhibits a distinct face on orientation,
no macroscopic order is evident in the brush copolymer.
C. D. Heinrich and M. Thelakkat, J. Chem. Phys. C 4 (2016) 5370
A. M. Anton, F. Kremer et al., J. Am. Chem. Soc. 137 (2015) 6034
A. M. Anton, F. Kremer et al., Macromolecules 49 (2016) 1798