Mesomorphic properties of achiral halogen-substituted banana-shaped compounds
- Authors
- Lee, CK; Kwon, SS; Zin, WC; Kim, DC; Shin, ST; Song, JH; Choi, EJ; Chien, LC
- Issue Date
- Apr-2003
- Publisher
- TAYLOR & FRANCIS LTD
- Citation
- LIQUID CRYSTALS, v.30, no.4, pp 415 - 421
- Pages
- 7
- Journal Title
- LIQUID CRYSTALS
- Volume
- 30
- Number
- 4
- Start Page
- 415
- End Page
- 421
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27029
- DOI
- 10.1080/0267829031000083759
- ISSN
- 0267-8292
1366-5855
- Abstract
- Three banana-shaped achiral compounds, derivatives of 4,6-dichloro-1,3-phenylene bis[4-(4-n-oetyloxyphenyliminomethyl)benzoate], were synthesized by varying the substituent (X = H, F and Cl). Their mesomorphic properties were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ray analysis. The compound with X = H exhibited an enantiomeric nematic phase. The compounds with X = F and Cl formed a nematic phase on heating, while on cooling they formed a nematic phase at high temperature and a smectic A phase at a lower temperature (monotropic). A schematic representation of the mesophase structures for the compound with X = F is also illustrated.
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