Physical Review Letters
achiral molecules, behavior
The first theoretical description of the experimentally often-observed isotropic-polar smectic phase transitions of symmetric and asymmetric bent-shape molecules is presented. The isotropic-tilted polar smectic phase transition requires a coupling among three types of ordering processes: polar packing, director tilt, and layer ordering. For explaining the unusual triclinic-monoclinic phase transition with the lower symmetry phase at higher temperature, observed in fluoro-containing compounds recently, a mechanism is proposed in which the layer ordering triggers the simultaneous onset of the tilt and polar order.
Jakli, Antal and Toledano, P. (2002). Unusual Sequences of Tilted Smectic Phases in Liquid Crystals of Bent-Shape Molecules. Physical Review Letters 89(27). doi: 10.1103/PhysRevLett.89.275504 Retrieved from http://digitalcommons.kent.edu/cpippubs/183