Antiferroelectric liquid crystal from bent-core molecule with vinyl end group
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- Title
- Antiferroelectric liquid crystal from bent-core molecule with vinyl end group
- Authors
- Lee, CK; Kwon, SS; Kim, TS; Shin, ST; Chow, H; Choi, EJ; Kim, SY; Zin, WC; Kim, DC; Chien, LC
- Date Issued
- 2004-08-20
- Publisher
- KOREAN CHEMICAL SOC
- Abstract
- Three banana-shaped achiral compounds, 4-chloro-1,3-phenylene bis [4-{4-(undecenyloxy)phenyl imino-methyl}benzoate] derivatives, were synthesized with variation of a substituent (x=H, F, Cl); their antiferroelectric properties are described. The smectic mesophases, including a switchable chiral smectic C(Sm C*) phase, were characterized by differential scanning calorimetry, polarizing optical microscopy, triangular wave method, and X-ray diffractometry. The presence of vinyl groups at the terminals of linear side wings in the banana-shaped achiral molecules induced a decrease in melting temperature and formation of the switchable Sm C* phase in the melt. The smectic phase having a lateral fluorine-substituent at 3-position of the Schiff's base moiety showed antiferroelctric switching, and the value of spontaneous polarization on reversal of an applied electric field was 250 nC/cm(2).
- Keywords
- banana-shaped liquid crystal; switchable smectic C; spontaneous polarization; antiferroelectric properties; bent-core molecule; CHIRAL-SYMMETRY-BREAKING; SHAPED ACHIRAL MOLECULES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29673
- DOI
- 10.5012/bkcs.2004.25.8.1171
- ISSN
- 0253-2964
- Article Type
- Article
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, vol. 25, no. 8, page. 1171 - 1176, 2004-08-20
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