Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δ<italic style="font-style: italic">n</italic> value

Tan LI; Zhen WANG; Guo-hua WANG; Zhi-yong ZHANG; jin-tao GUAN; zhi-qun DAI

doi:10.3788/YJYXS20173211.0861

您当前的位置：

首页 >

文章列表页 >

Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value

Material Science | 更新时间：2020-08-12

- Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value
- Chinese Journal of Liquid Crystals and Displays Vol. 32, Issue 11, Pages: 861-867(2017)
- 作者机构：
  
  武汉轻工大学化学与环境工程学院, 湖北武汉 430023
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20173211.0861
  CLC： O621.3
- Received：30 March 2017，
  
  Accepted：30 May 2017，
  
  Published：05 November 2017
- 稿件说明：
移动端阅览
Tan LI, Zhen WANG, Guo-hua WANG, et al. Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value[J]. Chinese journal of liquid crystals and displays, 2017, 32(11): 861-867.
DOI：

Tan LI, Zhen WANG, Guo-hua WANG, et al. Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value[J]. Chinese journal of liquid crystals and displays, 2017, 32(11): 861-867. DOI： 10.3788/YJYXS20173211.0861.

摘要

为了获得低熔点、折射率各向异性（Δ

）大的快速响应向列相液晶材料，高Δ

值的液晶混合体系中需要加入熔点在50℃以下、Δ

大于0.35的双环类液晶组分，以使快速响应向列相液晶材料满足室温工作的要求。本文合成了异硫氰基含氟二苯乙炔类液晶化合物；一方面由于在分子苯环侧位引入F原子，减小分子间作用力，使化合物的熔点下降；另一方面在两个苯环间引入三键、分子末端接入异硫氰基极性基团，增加了分子的共轭性，提高了目标化合物的Δ

值。获得了熔点分别为31℃和50℃、Δ

为0.39和0.40，这两种低熔点化合物与目前已具有的毫秒级快速响应向列相液晶化合物混合，可使其熔点低至10℃以下。

Abstract

In order to develop liquid crystal materials with low melting point

high birefringence (Δ

) and fast response

we need to join in double ring type LC compounds with the low melting point under 50℃ and the Δ

value with more than 0.35 in high Δ

values of the liquid crystal mixture system

which can make fast response nematic phase liquid crystal materials meet the requirements of working at room temperature. The liquid crystal compounds of isothiocyanate diphenylacetylene were designed and synthesized in this paper. By adding the isothiocyanate group at the molecular terminal

the birefringence of the liquid crystal increased. At the same time

F atom is introduced at the benzene ring side to reduce the viscosity of the liquid crystals. The results showed that the two target compounds' Δ

value were 0.39 and 0.4

and the melting points were 31℃ and 50℃

respectively

which would decrease the melting point of the present liquid crystals with a few milliseconds in response time as low as 10℃.

关键词

Keywords

references

ARIAS J, BARDAJÍ M, ESPINET P, et al. Azo isocyanide gold(Ⅰ) liquid crystals, highly birefringent and photosensitive in the mesophase[J]. Inorganic Chemistry, 2009, 48(13):6205-6210.

ZHONG H, WANG J Y, Li L Y, et al. The copper-free Sonogashira cross-coupling reaction promoted by palladium complexes of nitrogen-containing chelating ligands in neat water at room temperature[J]. Dalton Transactions, 2014, 43(5):2098-2103.

范程士, 罗忠林, 刘克刚, 等.含氟双二苯乙炔液晶的合成及液晶性[J].化工生产与技术, 2014, 21(1):1-6, 24.

FAN C S, LUO Z L, LIU K G, et al. Synthesis and Properties of monofluoro substituted double phenyl-tolane liquid crystals[J]. Chemical Production and Technology, 2014, 21(1):1-6, 24. (in Chinese)

CAO Z L, XUAN L, HA L F, et al. Effects of the space-bandwidth product on the liquid-crystal kinoform[J]. Optics Express, 2005, 13(14):5186-5191.

闵林, 姚丽双, 王玉坤, 等.单氟取代苯基二苯乙炔基异硫氰酸酯的合成与液晶性质研究[J].液晶与显示, 2015, 30(1):32-38.

MIN L, YAO L S, WANG Y K, et al. Synthesis and Properties of monofluoro substituted isothiocyanate phenyl-tolane liquid crystals[J]. Chinese Journal of Liquid Crystals and Displays, 2015, 30(1):32-38. (in Chinese)

CHEN Q, HIRD M. Synthesis, mesomorphic behaviour and optical anisotropy of some novel liquid crystals with lateral and terminal fluoro substituents and a 2, 6-disubstituted naphthalene core[J]. Liquid Crystals, 2015, 42(5/6):877-886.

LI J, YANG X Z, GAN N, et al. The effect of lateral fluorination on the properties of phenyl-tolane liquid crystals[J]. Liquid Crystals, 2015, 42(3):397-403.

高嫒嫒, 郑远洋, 杜渭松, 等.含氟液晶的性能、应用与合成进展[J].液晶与显示, 2014, 29(2):159-171.

GAO Y Y, ZHENG Y Y, DU W S, et al. Fluorinated liquid crystal properties, application and synthetic progress[J]. Chinese Journal of Liquid Crystals and Displays, 2014, 29(2):159-171. (in Chinese)

HIRD M, TOYNE K J, GOODBY J W, et al. Synthesis, mesomorphic behaviour and optical anisotropy of some novel materials for nematic mixtures of high birefringence[J]. Journal of Materials Chemistry, 2004, 14(11):1731-1743.

CATANESCU C O, WU S T, CHIEN L C. Tailoring the physical properties of some high birefringence isothiocyanato-based liquid crystals[J]. Liquid Crystals, 2004, 31(4):541-555.

SCHOENBERG A, BARTOLETTI I, HECK R F. Palladium-catalyzed carboalkoxylation of aryl, benzyl, and vinylic halides[J]. J. Org. Chem., 1974, 39(23):3318-3326.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value

Stability of phenyl-isothiocyanate liquid crystal materials

Synthesis and high frequency dielectric properties of low melting point triphenyl dialkyne liquid crystals

Synthesis and properties of fluorinated Phenylethynyltolane compounds

Molecular Design and Simulation of Nematic Liquid Crystal of Fast Response and High Birefringence

Related Author

DAI Zhi-qun

GUAN jin-tao

ZHANG Zhi-yong

WANG Guo-hua

WANG Zhen

LI Tan

MU Quanquan

PENG Zenghui

Related Institution

Department of Chemistry and Environmental Engineering, Wuhan Polytechnic University

Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences

Department of Chemistry and Environmental Engineering， Wuhan Polytechnic University

School of Electronic Science and Engineering， University of Electronic Science and Technology

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China 130033 Postal code：130033
Tel：0431-86176059 Email：yjxs@ciomp.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰

Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value

DOI：10.3788/YJYXS20173211.0861

摘要

Abstract

关键词

Keywords

references