SUN Liang, ZHANG Zhi-yong, YOU Hong-jun, DAI Zhi-qun, WEI Ben-mei, XUAN Li, PENG Zeng-hui. Synthesis and Low-Temperature Properties of Lateral Difluoro-Diphenyltolane Compounds[J]. , 2010,25(6): 784-791
SUN Liang, ZHANG Zhi-yong, YOU Hong-jun, DAI Zhi-qun, WEI Ben-mei, XUAN Li, PENG Zeng-hui. Synthesis and Low-Temperature Properties of Lateral Difluoro-Diphenyltolane Compounds[J]. , 2010,25(6): 784-791DOI:
The lateral difluoro-diphenyltolane compounds (Ⅵ) with low viscosity
high birefringence were synthesized. Their structures were determined by IR
1
H-NMR
13
C-NMR
19
F-NMR and MS. The transition temperature of liquid crystal phase and phase states were measured by DSC and POM. Their birefringence and viscosities at different temperature were also tested and analyzed. Experimental results show that the compounds synthesized exhibit high birefringence (
n
0.32)
have lower viscosities and smaller temperature dependence at low temperature
comparing with the other relative structure of tolane compounds. These compounds are particularly attractive for reducing the viscosity of liquid crystal materials and achieving fast response times in LCD.
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references
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