본문 바로가기
[학술저널]

  • 학술저널

J. K. Cha(고려대학교) K. W. Lee(고려대학교) I. H. Oh(고려대학교) J. H. Han(고려대학교) Cheol Eui Lee(고려대학교) J-I. Jin(고려대학교) J. Y. Choi(고려대학교)

UCI(KEPA) : I410-ECN-0101-2010-428-002418523

초록

We used ¹H nuclear magnetic resonance (NMR) to study the phase transitions and molecular dynamics in a characteristic ferroelectric liquid crystal with a carbon number n = 7, S-2-methylbutyl 4-n-heptyloxybiphenyl-4'-carboxylate (C7). The results were compared with those of our recent work on S-2-methylbutyl 4-n-octanoyloxybiphenyl-4'-carboxylate (C8), with a carbon number n = 8. While the recrystallization and isotropic phase transitions exhibited a first-order nature in the ¹H NMR spin-lattice and spin-spin relaxation measurements, a second-order nature was shown at the Sm-A - Sm-C* liquid crystalline phase transition. A soft-mode anomaly arising from the tilt angle amplitude fluctuation of the director, of which only a hint had been noticed in the C8 system, was manifested in the C7 system at this transition.

목차

1. Introduction
2. Experiment
3. Results and Discussion
Acknowledgements
References

리뷰(0)

도움이 되었어요.0

도움이 안되었어요.0

첫 리뷰를 남겨주세요.
DBpia에서 서비스 중인 논문에 한하여 피인용 수가 반영됩니다.
인용된 논문이 DBpia에서 서비스 중이라면, 아래 [참고문헌 신청]을 통해서 등록해보세요.
Insert title here