Overview

An asymmetric bent-core liquid crystal mesogen with only one tail was studied by optical polarizing microscopy, differential scanning calorimetry (DSC), x-ray diffraction, electro-optic investigation, freeze fracture transmission electron microscopy, and freely suspended film method. This mesogen shows two novel biaxial smectic phases: a low-temperature high-polarization SmAP F and a high-temperature low-polarization SmAPF'. The SmAPF' phase is very similar to SmAPF, except that molecular dipoles are not as well aligned as in the SmAPF phase resulting in a lower polarization. The smectic layers exhibit layer undulations due to the polarization splay. Despite the similarities between the SmAP F' and SmAPF phase, the SmAPF' shows bistable switching while the SmAPF' shows V-shaped switching.

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9781244042551

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