Synthesis of Multifluorotolane Negative Dielectric Ansotropy Liquid Crystals

SHANG Hong-yong; ZHANG Jian-li; LIU Xin-qin; HAN Yao-hua; LIANG Xiao

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Synthesis of Multifluorotolane Negative Dielectric Ansotropy Liquid Crystals

Material Physics & Chemistry | 更新时间：2020-08-12

- Synthesis of Multifluorotolane Negative Dielectric Ansotropy Liquid Crystals
- Chinese Journal of Liquid Crystals and Displays Vol. 24, Issue 5, Pages: 650-655(2009)
- 作者机构：
  
  1. 清华大学化学系北京,100084
  2. 石家庄永生华清液晶有限公司, 河北石家庄 050091,E-mail:hyshang07@gmail.com
- 作者简介：
- 基金信息：
- DOI：
  CLC： O753.2
- Received：25 March 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 October 2009，
  
  Published：30 October 2009
- 稿件说明：
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尚洪勇;张建立;刘鑫勤;韩耀华;梁晓;. 多氟二苯乙炔类负性液晶化合物的合成[J]. 液晶与显示, 2009,24(5): 650-655

SHANG Hong-yong;ZHANG Jian-li;LIU Xin-qin;HAN Yao-hua;LIANG Xiao;. Synthesis of Multifluorotolane Negative Dielectric Ansotropy Liquid Crystals[J]. 液晶与显示, 2009,24(5): 650-655
尚洪勇;张建立;刘鑫勤;韩耀华;梁晓;. 多氟二苯乙炔类负性液晶化合物的合成[J]. 液晶与显示, 2009,24(5): 650-655 DOI：

SHANG Hong-yong;ZHANG Jian-li;LIU Xin-qin;HAN Yao-hua;LIANG Xiao;. Synthesis of Multifluorotolane Negative Dielectric Ansotropy Liquid Crystals[J]. 液晶与显示, 2009,24(5): 650-655 DOI：

摘要

以烷基环己基酮、1

2-二氟苯为起始原料(或以2

3-二氟烷基苯为起始原料)

采用正丁基锂低温下制得金属锂化试剂

再经过系列反应制得4-烷基环己基-2

3-二氟碘苯(或4-烷基-2

3-二氟碘苯)

其与4-乙氧基-2

3-二氟苯乙炔发生Sonogashira偶联反应

合成出了3种2

3'-四氟二苯乙炔类液晶化合物。进行了产品的结构标定以及参数测定

确定该类化合物有较大的光学各向异性(Δ

)和负值较大的介电各向异性(Δ

)

并且具有较宽的相变温度范围

可以用于改善液晶材料的响应速度和驱动电压。

Abstract

This article reported three derivatives of 2

3' -terafluotolanes

which are prepared with 1-ethoxy-4-ethynyl-2

3-difluorobenzene and 1-alkylcyclohexyl-2

3-difluoro-4-iodobenzene (or 1-alkyl-2

3-difluoro-4-iodobenzene) by Sonogashira reactions.And the iodides are prepared with metal lithium reagents in low temperature from

-BuLi

alkylcyclohexanone and 1

2-difluorobenzene(or 1-alkyl-2

3-difluobenzene ) by a series of reactions. These compounds not only have large optical anisotropy(Δ

) and large negative dielectric ansotropy(Δ

)

but also have wider nematic phase temperature rang by a series photoelectricity test and DSC analysis. These materials can improve the respond time and drive voltage in LCD.

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Keywords

references

. 冉利,吴咏梅,周春阳.含氟液晶的研究 [J]. 四川师范学院学报(自然科学版), 2001,22(3):250-254.

. Feuerstein Marie, Doucet Henri, Santelli Maurice. Sonogashira reaction of heteroaryl halides with alkynes catalysed by a palladium-tetraphosphine complex [J]. J. Molecular Catalysis A:Chemical, 2006,256(1-2):75-84.

. Kim Jong-Ho, Lee Dong-Ho,Jun Bong-Hyun, et al. Copper-free Sonogashira cross-coupling reaction catalyzed by polymer-supported N-heterocyclic carbene palladium complex [J]. Tetrahedron Lett., 2007,48(40):7079-7084.

. Vasilevsky S F,Krivenko O L,Gorelik V R, et al. Synthetic and mechanistic aspects of cross-coupling of nitroxyl radicals of 3-imidazoline series with terminalalkynes [J]. Tetrahedron,2008, 64(37):8807-8814.

. Brandsma L,Vasilevsly S F,Verkruijsse H D. Application of Transition Metal Catalysts in Organic Synthesis [M]. Berlin, Germany:Springer-Verlage BerLin Heidellberg, 1998:220.

. Sonogashira Kenkichi. Development of Pd-Cu catalyzed cross-coupling of terminal acetylenes with sp2-carbon halides [J]. J. Organometallic Chem., 2002,653(1-2):46-49.

. Raju S, Batchu V R,Swamy N K,et al.Palladium-mediated synthesis of 5-substituted 4-alkynylthieno pyran-7-ones [J]. Tetrahedron Lett., 2006,47(1):83-88.

. Vasilevsky S F,Krivenko O L,Gorelik V R,et al.Synthetic and mechanistic aspects of cross-coupling of nitroxylradicals of 3-imidazoline series with terminalalkynes [J]. Tetrahedron, 2008,64(37):8807-8814.

. Feuerstein Marie,Doucet Henri,Santelli Maurice. Sonogashira reaction of heteroaryl halides with alkynes catalysed by apalladium-tetraphosphine complex [J]. J. Molecular Catalysis A:Chemical, 2006,256(1):75-84.

. 罗秀军,杜增家.含氟二苯乙炔类液晶材料合成与性能研究 [J]. 液晶与显示, 1999,14(2):90-93.

. 胡明刚,安忠维,杜渭松,等.二苯乙炔类液晶化合物:CN,192395A .2007-03-07.

. 刘鑫勤,韩耀华,吕文海,等. 2,3,2',3'-四氟二苯乙炔衍生物、其组合物、其制备方法及其用途:CN,1911888A .2007-02-14.

. Greenfield S,Coates D,Goulding M,et al.Nematogenic laterally fluorinated biphenyls with polar terminal groups [J]. Liquid Crystal,1995,18(4):665-672.

. Kirsch Peer, Bremer Matthias.Nematic liquid crystals for active matrix displays:molecular design and synthesis [J].Angew. Chem. Int. Ed.,2000,39(23):4216-4235.

. 李建,安忠维,杨毅,等.TFT-LCD用液晶显示材料进展 [J]. 液晶与显示,2002,17(2):104-113.

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