Dielectric Modes in Antiferroelectric and Ferroelectric Liquid Crystals in a Pure Enantiomeric Version and a Racemic Mixture.

ABSTRACT: The dielectric properties of synclinic (ferroelectric SmC*) and anticlinic (antiferroelectric SmC_A*) smectic liquid crystals composed of molecules of one chiral version (S) are presented and compared with properties of racemic mixture (R, S), showing SmC and SmC_A phases. The racemic mixture completely loses its ferroelectric and antiferroelectric properties. Surprisingly, only one dielectric mode observed in the antiferroelectric SmC_A* phase disappeared in the dielectric response of the racemic SmC_A phase. Additionally, we observed that in the SmC phase, seen in the racemic mixture, the weak dielectric mode (named the X mode) is detected, which seems to be the continuation of the P_L mode existing in the racemic SmC_A. Moreove

SUBMITTER: Perkowski P 

PROVIDER: S-EPMC11243658 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature