Physical Review Letters
Liquid Crystal Phases, Achiral Molecules, Shaped Molecules, Polarization, Transitions, Mixtures, Fluid, Order, Field
A biaxial nematic phase had been predicted with D2h symmetry, wherein the mesogen’s long and short transverse axes are simultaneously aligned along the two orthogonal, primary and secondary directors, n and m, respectively. The unique low-angle x-ray diffraction patterns in the nematic phases exhibited by three rigid bent-core mesogens clearly reveal their biaxiality. The results of x-ray diffraction can be readily reproduced by ab initio calculations that explicitly include the bent-core shape in the form factor and assume short-range positional correlations.
Acharya, Bharat R.; Primak, Andrew; and Kumar, Satyendra (2004). Biaxial Nematic Phase in Bent-Core Thermotropic Mesogens. Physical Review Letters 92(14). doi: 10.1103/PhysRevLett.92.145506 Retrieved from http://digitalcommons.kent.edu/phypubs/10