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Liquid Crystals Volume 44, 2017 - Issue 11
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Article

New terphenyl liquid crystals terminated by 2-chloro-3,3,3-trifluoropropenyl group

Kuanguang SongState Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an, P. R. China;Optical and Electrical Material Center, Xi’an Modern Chemistry Research Institute, Xi’an, P. R. ChinaView further author information
,
Jian LiState Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an, P. R. China;Optical and Electrical Material Center, Xi’an Modern Chemistry Research Institute, Xi’an, P. R. ChinaView further author information
,
Juanli LiState Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an, P. R. China;Optical and Electrical Material Center, Xi’an Modern Chemistry Research Institute, Xi’an, P. R. ChinaView further author information
,
Minggang HuState Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an, P. R. China;Optical and Electrical Material Center, Xi’an Modern Chemistry Research Institute, Xi’an, P. R. ChinaView further author information
&
Zhongwei AnState Key Laboratory of Fluorine & Nitrogen Chemicals, Xi’an, P. R. China;Optical and Electrical Material Center, Xi’an Modern Chemistry Research Institute, Xi’an, P. R. China;School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, P. R. ChinaCorrespondence[email protected]
View further author information
Pages 1646-1652 | Received 25 Jan 2017, Accepted 10 Mar 2017, Published online: 22 Mar 2017
 
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ABSTRACT

New liquid crystal (LC) compounds composed of terphenyl as a core and 2-chloro-3,3,3-trifluoropropenyl terminal group were synthesised. Their structures were confirmed by nuclear magnetic resonance, mass spectra and infrared spectrometry. The mesomorphic and physical properties were evaluated. The results show that these compounds have a smectic phase, large dielectric anisotropy, high birefringence and suitable rotational viscosity. The lateral fluorine substitutions lead to a large perpendicular component of the dielectric constant, and a small value of Δε/ε⊥. These characteristics are significant for the fringe-field switching LC display mode.

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Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Defense Industrial Technology Development Program of China [grant number B1120132028] and by Administry of Education [joint Fund N. 6141A02022219].

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