Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Poster: Colloids and Complex Liquids

CPP 16.12: Poster

Dienstag, 27. März 2012, 18:15–20:45, Poster A

Triphenylene-based discotic liquid crystals in bulk and confined to alumina oxide membranes — •Christina Krause, Huajie Yin, and Andreas Schönhals — BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin

Discotic liquid crystals consist of a stiff aromatic core surrounded by flexible aliphatic side chains. As the disc-shaped molecules of the core self-organize into hexagonal columnar arrays, the alkyl chains fill the space between the columns yielding a nanophase separated state. A series of triphenylene-based discotic liquid crystals (2,3,6,7,10,11-Hexakis[n-oxy]triphenylene (HATn, n=5,6,8,10) is investigated by means of Dielectric Relaxation Spectroscopy, Differential Scanning and Differential Alternating Current Chip Calorimetry. Nanoporous alumina membranes with different pores sizes are filled with the triphenylene derivatives to study the influence of confinement on the dynamics in these discotic liquid crystals by means of Dielectric Relaxation Spectroscopy.