A ferroelectric liquid crystal, S -2-methylbutyl 4- n -octanoyloxybiphenyl- 4′ -carboxylate, undergoing a characteristic polarization inversion, has been studied by H1 nuclear magnetic resonance (NMR). In addition to the discontinuities at the first-order isotropic and recrystallization phase transitions, the nuclear magnetic relaxation revealed a weak anomaly attributed to the soft mode at the Sm-A-Sm-C*liquid crystalline phase transition. Besides, the polarization inversion in the Sm-C*phase was manifested in the nuclear magnetic relaxation as well as in the NMR lineshape and in the temperature-dependent relative peak positions of the NMR line components, indicating that the polarization inversion is associated with a conformational transition.
Bibliographical noteFunding Information:
This work was supported by the Korea Ministry of Education, Science and Technology (NRL Program No. R0A-2008-000-20066-0, User Program of Proton Engineering Frontier Project and Project No. 20090082672). The Korean Basic Science Institute (KBSI) is gratefully acknowledged for the measurements.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)