Dresden 2011 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: Organic Semiconductors
CPP 8.20: Poster
Monday, March 14, 2011, 17:30–19:30, P2
Structural investigations of liquid crystalline Perylene-di-ester benzimidazole — •Gaurav Gupta1, Mathis Muth2, Peter Kohn1, Thomas Thurn Albrecht1, and Mukundan Thelakkat2 — 1Institute für Physik Martin Luther Universität Halle — 2Applied Functional Polymer University of Bayreuth
Discotic liquid crystals typically comprise a rigid aromatic core and flexible peripheral chains where the structure of the core determines the optical and intramolecular electronic properties, while the flexible side chains are decisive for self assembly and processibility from solution. As part of a side chain polymer the electro-optical properties of the discotic can be combined with the mechanical, film forming properties of a polymer. We here present the structural and optical characterization of a new liquid crystal model compound Perylene-di-ester benzimidazole(PDBI) and its polymer (PPDBI) based on XRD, DSC ,UV/Vis spectroscopy. In comparison to a common Perylene Bisimide and its side chain polymer, PDBI shows an extended absorption spectrum and a less ordered, columnar liquid crystalline phase.