A longitudinal ferroelectric smectic phase lacks a reflection or mirror symmetry, which may be achieved with appropriate chemical design of molecules. Using x-ray diffraction, we have examined three candidate systems: a fraternal-twin triester, a mixture of polyphilic compounds, and a cyclic siloxane co-oligomer. These systems have been reported to exhibit properties indicative of longitudinal ferroelectric phases. A comparative structural analysis of these materials is presented.
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Shi, Yushan; Mang, Joseph T.; Kumar, Satyendra; Samulski, Edward T. (1997). A Comparative Structural Study of Three Prospective Longitudinal Ferroelectric Smectic Liquid Crystals. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 302(1) 47-55. doi: 10.1080/10587259708041808. Retrieved from https://oaks.kent.edu/article/comparative-structural-study-three-prospective-longitudinal-ferroelectric-smectic-liquid