Cubic and tetragonal liquid crystal phases composed of non-chiral molecules: Chirality and macroscopic properties.

摘要: We discuss the symmetry properties as well macroscopic behavior of cubic liquid crystal phases showing large chiral domains either hand in some non-chiral compounds reported recently group Tschierske. These are tricontinuous. While they have O or I432 each domain, overall is $ I m \bar{3} m$ there no net chirality for composed molecules. It turns out that a rather similar type phase has also been triblock copolymers. Here we analyze detail static and dynamic such predict, among other results, show analog dissipative Lehmann-type effects their domains. A description crystalline Th symmetry, which not yet found experimentally, included. Suggestions experiments outlined to identify phase. In addition, tetragonal D4h D4 (I422) last year experimentally connection Q