We have studied the phase sequence and physical properties of an asymmetric bent-core material with a chiral rigid cholesteryl moiety, and a flexible achiral alkyl side chain at the other end. The combination of the achiral bent core with the chiral cholesteryl unit results in properties different from those of both the usual calamitic and bent-core materials. We find that the presence of the bent core unit induces a wide-temperature-range optically isotropic (probably BPIII) mesophase between the isotropic and cholesteric (chiral nematic) phases. Below the cholesteric phase a ferroelectric smectic-C-* structure occurs in which the bent-core units do not seem to form a polar close packing.
Physical Review E
Copyright 2006 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.73.051701.
Liao, Guangxun; Shashikala, Indudhara Swami; Yelamaggad, Channabasaveshwar V.; Shankar Rao, Doddamane S.; Prasad, Subbarao Krishna; Jakli, Antal (2006). Ferroelectricity of a Bent-Core Material with Cholesteryl Terminal Chain. Physical Review E 73(5) Retrieved from https://oaks.kent.edu/cpippubs/59