Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 39: POSTERS Colloids and Liquids

CPP 39.24: Poster

Donnerstag, 26. März 2009, 17:00–19:30, P3

Quadratic electroclinic effect in bent-core liquid crystals — •Stephan Stern, Alexey Eremin, and Ralf Stannarius — Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, D-39106 Magdeburg

We report an electric-field induced SmA-SmC transition in a liquid crystal formed by achiral bent molecules. The steric moment of such molecules is too small to spontaneously induce the phases characteristic to the bent-core mesogens. On the other hand, its contribution to the thermodynamical properties of the mesophases make it possible to induce tilt and polar order by the action of the external electric field. This effect is unique for bent mesogens and its physical nature differs from an electroclinic effect observed in the SmA* phase of chiral liquid crystals.