Microwave dielectric properties of fluorine substituted phenylacetylene liquid crystal compounds

Shi-yan LI; Chan WANG; Jin-tao GUAN; Zhi-yong ZHANG; Xiang-ru WANG; Shi-han GAO

doi:10.37188/CJLCD.2021-0025

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Microwave dielectric properties of fluorine substituted phenylacetylene liquid crystal compounds

Material Physics | 更新时间：2021-07-13

- Microwave dielectric properties of fluorine substituted phenylacetylene liquid crystal compounds
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 7, Pages: 913-920(2021)
- 作者机构：
  
  1.武汉轻工大学化学与环境工程学院, 湖北武汉 430023
  2.电子科技大学光电科学与工程学院, 四川成都 611730
  3.广州海格通信集团股份有限公司, 广东广州 510663
- 作者简介：
- 基金信息：
  
  Supported by National Equipment Development Department Pre-research Fund Project of China(61409230701)
- DOI：10.37188/CJLCD.2021-0025
  CLC： O69;O621.2
- Received：03 March 2021，
  
  Revised：14 March 2021，
  
  Published：2021-07
- 稿件说明：
移动端阅览
Shi-yan LI, Chan WANG, Jin-tao GUAN, et al. Microwave dielectric properties of fluorine substituted phenylacetylene liquid crystal compounds[J]. Chinese journal of liquid crystals and displays, 2021, 36(7): 913-920.
DOI：

Shi-yan LI, Chan WANG, Jin-tao GUAN, et al. Microwave dielectric properties of fluorine substituted phenylacetylene liquid crystal compounds[J]. Chinese journal of liquid crystals and displays, 2021, 36(7): 913-920. DOI： 10.37188/CJLCD.2021-0025.

摘要

近年来基于液晶材料的微波通信器件研究发展迅速，液晶材料的介电损耗成为制约微波器件发展的瓶颈，然而目前对微波用液晶材料性能报道较少。本文以低熔点高双折射侧位含氟苯乙炔类液晶作为研究对象，将其按一定比例掺杂到母体液晶MA中，采用矩形谐振腔微扰法测试所选液晶化合物在微波频段(10~30 GHz)下的介电性能，探讨分子结构对微波频段液晶介电性能的影响作用。实验结果表明：在高频时的液晶介电各向异性与分子极性和双折射率相关，侧位含氟苯乙炔类和端基异硫氰基苯乙炔类液晶化合物均具有较大的介电各向异性(Δ

0.85)；对于具有较高双折射率的对称含氟三苯二炔类和三苯乙炔异硫氰基类液晶化合物表现出较低的介电损耗(tan

δε

r⊥

8.0×10

-3

，18 GHz)，而异硫氰基的含氟二苯乙炔类和不对称含氟三苯二炔类液晶化合物则表现出较高的介电损耗(tan

δε

r⊥

8.0×10

-3

，18 GHz)。

Abstract

In recent years

the research of liquid crystal microwave communication devices has developed rapidly. The high dielectric loss of liquid crystal materials has become a bottleneck restricting the development of microwave devices. There are few reports on the properties of liquid crystal materials at microwaves. Therefore

we take the fluorine substituted tolane-type compounds with low melting point and high birefringence as the research object

doping them into the liquid crystal matrix MA in a certain proportion respectively

and testing them at microwave k-band (10~30 GHz) through the rectangular cavity perturbation method. And then

the influence of molecular structure on the dielectric properties of liquid crystals at microwave frequency is discussed.The experimental results show that dielectric anisotropy at high-frequency is related to the polarity of liquid crystal molecules and birefringence. The lateral fluorophenyl phenylacetylene and terminal isothiocyano phenylacetylene liquid crystal compounds exhibit high dielectric anisotropy(Δ

0.85). Triphenyl diacetylenes substituted by F-atom symmetrically and triphenyl acetylene liquid crystal compounds with terminal isothiocyanate exhibit lower dielectric loss(tan

δε

r⊥

0.008

18 GHz) due to higher birefringence. Fluorinated diphenylacetylenes with terminal isothiocyanates and triphenyldiyne substituted with fluorine asymmetrically liquid crystal compounds show higher dielectric loss(tan

δε

r⊥

0.008

18 GHz).

关键词

Keywords

references

J GRINBERG , W P BLEHA , A D JACOBSON , 等 . Photoactivated birefringent liquid-crystal light valve for color symbology display . IEEE Transactions on Electron Devices , 1975 . 22 ( 9 ): 775 - 783 . DOI: 10.1109/T-ED.1975.18218 http://doi.org/10.1109/T-ED.1975.18218 .

T AJITO , T OBI , M YAMAGUCHI , 等 . Multiprimary color display for liquid crystal display projectors using diffraction grating . Optical Engineering , 1999 . 38 ( 11 ): 1883 - 1888 . DOI: 10.1117/1.602276 http://doi.org/10.1117/1.602276 .

LIJIMA A, HAIDA M, ISHIKAWA N, et al . Head mounted goggle system with liquid crystal display for evaluation of eye tracking functions on neurological disease patients[C] // Proceedings of the 25 th Annual International Conference of the IEEE Engineering in Medicine and Biology Society . Cancun, Mexico: IEEE, 2003.

Z B GE , S T WU , S H LEE . Wide-view and sunlight readable transflective liquid-crystal display for mobile applications . Optics Letters , 2008 . 33 ( 22 ): 2623 - 2625 . DOI: 10.1364/OL.33.002623 http://doi.org/10.1364/OL.33.002623 .

GOTODAH . A multilayer liquid crystal display for autostereoscopic 3D viewing . Proceedings of the SPIE , 2010 . 7524 75240P DOI: 10.1117/12.840286 http://doi.org/10.1117/12.840286 .

C Y YU , E LI , Z Y ZHANG , 等 . Broadband complex permittivity measurements of nematic liquid crystals based on cavity perturbation method . Liquid Crystals , 2020 . 47 ( 1 ): 89 - 98 . DOI: 10.1080/02678292.2019.1630488 http://doi.org/10.1080/02678292.2019.1630488 .

CAMLEYR , Z CELINSKI , Y GARBOVSKIY , 等 . Liquid crystals for signal processing applications in the microwave and millimeter wave frequency ranges . Liquid Crystals Reviews , 2018 . 6 ( 1 ): 17 - 52 . DOI: 10.1080/21680396.2018.1509385 http://doi.org/10.1080/21680396.2018.1509385 .

F ALIHOSSEINI , V AHMADI , A MIR . Design and analysis of a tunable liquid crystal switch/filter with metallic nano-slits . Liquid Crystals , 2015 . 42 ( 11 ): 1638 - 1642 . http://www.tandfonline.com/doi/full/10.1080/02678292.2015.1082650 http://www.tandfonline.com/doi/full/10.1080/02678292.2015.1082650 .

LAPANIK A. Liquid Crystal Systems for Microwave Applications [M]. 2010: 5-13.

A LAPANIK , F GÖLDEN , S MULLER , 等 . Highly birefringent nematic mixtures at room temperature for microwave applications . Optical Engineering , 2011 . 50 ( 8 ): 081208 DOI: 10.1117/1.3564878 http://doi.org/10.1117/1.3564878 .

J HERMAN , J DZIADUSZEK , R DBROWSKI , 等 . Novel high birefringent isothiocyanates based on quaterphenyl and phenylethynyltolane molecular cores . Liquid Crystals , 2013 . 40 ( 9 ): 1174 - 1182 . DOI: 10.1080/02678292.2013.808768 http://doi.org/10.1080/02678292.2013.808768 .

J HERMAN , P KULA . Design of new super-high birefringent isothiocyanato bistolanes-synthesis and properties . Liquid Crystals , 2017 . 44 ( 9 ): 1462 - 1467 . DOI: 10.1080/02678292.2017.1282548 http://doi.org/10.1080/02678292.2017.1282548 .

R KOWERDZIEJ , M OLIFIERCZUK , J PARKA . Thermally induced tunability of a terahertz metamaterial by using a specially designed nematic liquid crystal mixture . Optics Express , 2018 . 26 ( 3 ): 2443 - 2452 . DOI: 10.1364/OE.26.002443 http://doi.org/10.1364/OE.26.002443 .

MICHAEL W, DAGMAR K. Liquid-crystalline medium, compounds, and high-frequency components: US, 20180105748A1[P]. 2018-04-19.

陈婷. 微波移相器用液晶材料研制[D]. 武汉: 武汉轻工大学, 2019.

CHEN T. Study of liquid crystal materials for microwave phase shifters[D]. Wuhan: Wuhan Polytechnic University, 2019. (in Chinese)

刘可庆. 超高双折射率液晶合成及其性能研究[D]. 武汉: 武汉轻工大学, 2014.

LIU K Q. Synthesis and properties of liquid crystals with high birefringence[D]. Wuhan: Wuhan Polytechnic University, 2014. (in Chinese)

章思汗 , 刘可庆 , 张智勇 , 等 . 含氟三苯二炔类液晶化合物合成及其性质研究 . 液晶与显示 , 2015 . 30 ( 5 ): 769 - 776 . http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20153005.0769&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20153005.0769&graphicAbstract=0 .

S H ZHANG , K Q LIU , Z Y ZHANG , 等 . Synthesis and properties of fluorinated Phenylethynyltolane compounds . Chinese Journal of Liquid Crystals and Displays , 2015 . 30 ( 5 ): 769 - 776 . http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20153005.0769&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20153005.0769&graphicAbstract=0 .

孙亮 , 张智勇 , 游红军 , 等 . 含氟联苯乙炔液晶化合物的合成及其低温性能 . 液晶与显示 , 2010 . 25 ( 6 ): 784 - 791 . DOI: 10.3969/j.issn.1007-2780.2010.06.004 http://doi.org/10.3969/j.issn.1007-2780.2010.06.004 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1688947&Fpath=&graphicAbstract=0&index=-1 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1688947&Fpath=&graphicAbstract=0&index=-1 .

L SUN , Z Y ZHANG , H J YOU , 等 . Synthesis and low-temperature properties of lateral difluoro-diphenyltolane compounds . Chinese Journal of Liquid Crystals and Displays , 2010 . 25 ( 6 ): 784 - 791 . DOI: 10.3969/j.issn.1007-2780.2010.06.004 http://doi.org/10.3969/j.issn.1007-2780.2010.06.004 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1688947&Fpath=&graphicAbstract=0&index=-1 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1688947&Fpath=&graphicAbstract=0&index=-1 .

黄江涛. 高双折射率含氟液晶的合成与性能研究[D]. 武汉: 武汉轻工大学, 2013.

HUANG J T. Study on synthesis and performance of fluorinated liquid crystal with high birefringence[D]. Wuhan: Wuhan Polytechnic University, 2013. (in Chinese)

王国华. 含氟异硫氰酸酯高双折射率液晶的合成研究[D]. 武汉: 武汉轻工大学, 2013.

WANG G H. Synthesis of fluoride isothiocyanate liquid crystals with high birefringence[D]. Wuhan: Wuhan Polytechnic University, 2013. (in Chinese)

杨学军 , 张旺财 , 张严伟 , 等 . 多卤代联苯类化合物及其制备的液晶单体 . 液晶与显示 , 2019 . 34 ( 12 ): 1143 - 1147 . http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20193412.1143&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20193412.1143&graphicAbstract=0 .

X J YANG , W C ZHANG , Y W ZHANG , 等 . Polyhalogenated biphenyl compound and its liquid crystal monomer . Chinese Journal of Liquid Crystals and Displays , 2019 . 34 ( 12 ): 1143 - 1147 . http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20193412.1143&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.3788/YJYXS20193412.1143&graphicAbstract=0 .

李建 , 车昭毅 , 莫玲 , 等 . 5, 6-二氟苯并呋喃: 新的核结构用于液晶分子设计 . 液晶与显示 , 2020 . 35 ( 10 ): 1000 - 1005 . DOI: 10.37188/YJYXS20203510.1000 http://doi.org/10.37188/YJYXS20203510.1000 http://cjlcd.lightpublishing.cn/thesisDetails#10.37188/YJYXS20203510.1000&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.37188/YJYXS20203510.1000&graphicAbstract=0 .

J LI , Z Y CHE , L MO , 等 . 5, 6-difluoro-benzofuran: a new core structure for the design of liquid crystal compound . Chinese Journal of Liquid Crystals and Displays , 2020 . 35 ( 10 ): 1000 - 1005 . DOI: 10.37188/YJYXS20203510.1000 http://doi.org/10.37188/YJYXS20203510.1000 http://cjlcd.lightpublishing.cn/thesisDetails#10.37188/YJYXS20203510.1000&graphicAbstract=0 http://cjlcd.lightpublishing.cn/thesisDetails#10.37188/YJYXS20203510.1000&graphicAbstract=0 .

任占冬, 张智勇, 朱玉婵, 等. 一种提纯液晶材料的方法: 中国, 101760203A[P]. 2010-06-30.

REN Z D, ZHANG Z Y, ZHU Y C, et al . Method for purifying liquid crystal material: CN, 101760203A[P]. 2010-06-30. (in Chinese)

张然 , 彭增辉 , 刘永刚 , 等 . 高Δ n 低粘度液晶的合成及性能研究 . 液晶与显示 , 2009 . 24 ( 6 ): 789 - 793 . DOI: 10.3969/j.issn.1007-2780.2009.06.003 http://doi.org/10.3969/j.issn.1007-2780.2009.06.003 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1687717&Fpath=&graphicAbstract=0&index=-1 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1687717&Fpath=&graphicAbstract=0&index=-1 .

R ZHANG , Z H PENG , Y G LIU , 等 . Synthesis and properties of high birefringence and low viscosity liquid crystal . Chinese Journal of Liquid Crystals and Displays , 2009 . 24 ( 6 ): 789 - 793 . DOI: 10.3969/j.issn.1007-2780.2009.06.003 http://doi.org/10.3969/j.issn.1007-2780.2009.06.003 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1687717&Fpath=&graphicAbstract=0&index=-1 http://cjlcd.lightpublishing.cn/thesisDetails?columnId=1687717&Fpath=&graphicAbstract=0&index=-1 .

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