The locally polar smectic A phase in V-shaped molecules
- Title
- The locally polar smectic A phase in V-shaped molecules
- Author
- 김재훈
- Keywords
- BENT-CORE MOLECULES; LIQUID-CRYSTALS; MESOMORPHIC BEHAVIOR; A PHASE; HOMOLOGOUS SERIES; ACHIRAL MOLECULES; MESOGENS; 1,2-PHENYLENE
- Issue Date
- 2012-12
- Publisher
- Royal Society of Chemistry
- Citation
- Journal of materials chemistry, 2012, 22(47), P.24930-24935
- 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).
- URI
- http://pubs.rsc.org/-/content/articlelanding/2012/jm/c2jm35530b/unauth#!divAbstracthttp://hdl.handle.net/20.500.11754/48431
- ISSN
- 0959-9428
- DOI
- 10.1039/c2jm35530b
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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