Ferroelectric liquid crystals from banana-shaped achiral molecules with vinyl end groups
- Authors
- Lee, CK; Kwon, SS; Shin, ST; Choi, EJ; Lee, S; Chien, LC
- Issue Date
- Aug-2002
- Publisher
- TAYLOR & FRANCIS LTD
- Citation
- LIQUID CRYSTALS, v.29, no.8, pp 1007 - 1013
- Pages
- 7
- Journal Title
- LIQUID CRYSTALS
- Volume
- 29
- Number
- 8
- Start Page
- 1007
- End Page
- 1013
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27037
- DOI
- 10.1080/02678290210149540
- ISSN
- 0267-8292
1366-5855
- Abstract
- Banana-shaped achiral compounds, the 1,3-phenylene bis[4-( alkenyloxyphenyliminomethyl)benzoate] s, were synthesized with varying length of the alkenyl group; their ferroelectric properties are described. The smectic mesophases, including a switchable chiral smectic C (SmC*) phase, were characterized by differential scanning calorimetry, polarizing optical microscopy and the triangular wave method. The presence of vinyl groups at the ends of the linear side-wings in the banana-shaped achiral molecules, containing a Schiff's base mesogen, induced a decrease in melting temperature and formation of the switchable SmC* phase in the melt. The compound having the octenyloxy group exhibited a spontaneous polarization of 120 nC cm(-2) on reversal of an applied electric field.
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