Banana-shaped molecules with 4,6-dichlorinated central core: effect of lateral substituents and terminal chains on the formation of antiferroelectric smectic mesophases
SCIE
SCOPUS
- Title
- Banana-shaped molecules with 4,6-dichlorinated central core: effect of lateral substituents and terminal chains on the formation of antiferroelectric smectic mesophases
- Authors
- Kwon, SS; Kim, TS; Lee, CK; Choi, H; Shin, ST; Park, JK; Zin, WC; Chien, LC; Choi, SS; Choi, EJ
- Date Issued
- 2006-09
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- Six banana-shaped compounds with a central core based on a 4,6-dichloro-1,3-phenylene group were synthesized by varying the terminal chains (R=OC10H21 or OC11H21) and the lateral substituents (X=H, F or Cl). Their mesophases were characterized by a combination of differential scanning calorimetry, polarizing optical microscopy, triangular wave method, and X-ray diffractometry. Mesomorphic properties of the banana-shaped mesogens with an olefinic group (R=OC11H21) as a terminal chain are sensitive to lateral halogen substituents as much as those of the analogues with a saturated group (R=OC10H21). The compounds with X=F showed an antiferroelectric switchable smectic phase, which has been designated a B-2 phase. The compounds without a lateral halogen substituent only formed a nematic phase, while the compounds with X=Cl did not exhibit a mesophase in the melt.
- Keywords
- ACHIRAL MOLECULES; LIQUID-CRYSTALS; MESOGENS; BEHAVIOR; FIELD; PHASES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29580
- DOI
- 10.1080/026782906009
- ISSN
- 0267-8292
- Article Type
- Article
- Citation
- LIQUID CRYSTALS, vol. 33, no. 9, page. 1005 - 1014, 2006-09
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