The locally polar smectic A phase in V-shaped molecules
- Authors
- Choi, E-Joon; Kim, Eun-Chol; Park, Sang-Byung; Zin, Wang-Cheol; Lee, You-Jin; Kim, Jae-Hoon
- Issue Date
- Oct-2012
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, v.22, no.47, pp.24930 - 24935
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY
- Volume
- 22
- Number
- 47
- Start Page
- 24930
- End Page
- 24935
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164524
- DOI
- 10.1039/c2jm35530b
- ISSN
- 0959-9428
- Abstract
- For focusing on the polar smectic A phase derived from the V-shaped molecules, bent-core molecules with an acute-angled central core (Ar = 1,2-phenylene or 2,3-naphthylene) and a lateral halogen substituent (X = F or Cl) were synthesized. Their mesomorphic properties were investigated by DSC, polarizing microscopy, X-ray and electro-optical measurements. We found that a compound with Ar/X = 2,3-naphthylene/Cl forms the conventional smectic A phase, whereas three compounds with Ar/X = 1,2-phenylene/F, 1,2-phenylene/Cl and 2,3-naphthylene/F form the locally polar smectic A phase (SmAP(R)). According to our knowledge this is the first obvious experimental evidence that V-shaped molecules with an acute-subtended angled central core, in cooperation with a lateral halogen substituent, can form the SmAP(R).
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