The first experimental evidence for triclinic symmetry of bulk smectic liquid-crystal samples of achiral banana-shaped molecules is presented. This phase corresponds to the so-called Sm-C-G phase consisting of biaxial molecules and characterized by two tilt directions with respect to the layer normal: tilt of the molecular plane (clinic) and tilt of the molecular kink direction (leaning). Each smectic layer has a polarization component normal to the smectic layers (C-1 symmetry). The observations suggest that the phase tentatively labeled as B-7 is identical with the Sm-C-G phase.
Physical Review Letters
Copyright 2001 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.86.5715
Jakli, Antal; Kruerke, D.; Sawade, Hans; Heppke, G. (2001). Evidence for Triclinic Symmetry in Smectic Liquid Crystals of Bent-Shape Molecules. Physical Review Letters 86(25) 5715-5718. doi: 10.1103/PhysRevLett.86.5715. Retrieved from https://oaks.kent.edu/cpippubs/178