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1. 上海大学材料科学与工程学院高分子材料系 上海,200444
2. 友邦(江苏)聚氨酯新材料有限公司, 江苏江阴,214446
收稿日期:2015-11-19,
修回日期:2015-12-17,
纸质出版日期:2016-04-05
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苏新艳, 范程士, 李继响等. 含亚甲氧基桥键负性单体液晶的制备及性能研究[J]. 液晶与显示, 2016,31(4): 353-357
SU Xin-yan, FAN Cheng-shi, LI Ji-xiang etc. Preparation and properties of oxymethylene-bridged negative liquid crystal[J]. , 2016,31(4): 353-357
苏新艳, 范程士, 李继响等. 含亚甲氧基桥键负性单体液晶的制备及性能研究[J]. 液晶与显示, 2016,31(4): 353-357 DOI: 10.3788/YJYXS20163104.0353.
SU Xin-yan, FAN Cheng-shi, LI Ji-xiang etc. Preparation and properties of oxymethylene-bridged negative liquid crystal[J]. , 2016,31(4): 353-357 DOI: 10.3788/YJYXS20163104.0353.
含亚甲氧基桥键负性单体液晶由于具有较大的负介电各向异性
较低的旋转粘度、良好的相溶性而被广泛应用于VA-TFT配方中
但其合成步骤长
合成及提纯难度大。本文讨论了含亚甲氧基桥键及苯环侧向氟取代的负介电各向异性单体液晶的合成方法
该方法主要采用2
3-二氟-4-乙氧基苯酚与含不同长度烷基链的苯磺酸酯反应引入亚甲氧基桥键
避免了常用醚化方法中卤代物的使用和卤素离子对单体液晶性能的影响。使用
1
H NMR对目标单体液晶的结构进行了表征;采用DSC、热台偏光显微镜、LCR测试仪等对目标单体液晶的相变温度、光学各向异性、介电各向异性等一系列液晶性能参数进行了测试。
Oxymethylene-bridged negative liquid crystal has been widely used in VA-TFT mixtures owing to its relatively large negative dielectric anisotropy
low viscosity and good phase solubility with other liquid crystals. However
the long synthetic route and difficulty in purification have been obstacles in application. In this paper
three oxymethylene-bridged negative liquid crystal compounds were synthesized via the etherification reaction of 4-ethoxy-2
3-difluorophenol with different alkylbenzene sulfonate. The method effectively avoids impurity resulting from the introduction of halogen ions in conventional method. All key compounds were characterized by
1
H NMR spectroscopy. The liquid crystal properties
such as phase transition temperature
optical anisotropy and dielectric anisotropy were measured by DSC
TPOM and LCR testing analyzer.
胡明刚, 李建, 安忠维.V A-TFT用负介电各向异性液晶材料研究进展[J]. 化工新型材料, 2007, 35(5):5-6, 12. HU M G, LI J, AN Z W. Progress of liquid crystal materials for VA-TFT[J]. New Chemical Materials, 2007, 35(5):5-6, 12. (in Chinese)
CHEN Y, PENG F L, YAMAGUCHI T, et al. High performance negative dielectric anisotropy liquid crystals for display applications[J]. Crystals, 2013, 3(3):483-503.
YUN H J, JO M H, JANG I W, et al. Achieving high light efficiency and fast response time in fringe field switching mode using a liquid crystal with negative dielectric anisotropy[J]. Liquid Crystals, 2012, 39(9):1141-1148.
GAUZA S, JIAO M Z, WU S T, et al. High birefringence and low viscosity negative dielectric anisotropy liquid crystals[J]. Liquid Crystals, 2008, 35(12):1401-1408.
HIRD M. Fluorinated liquid crystals-properties and applications[J]. Chemical Society Reviews, 2007, 36(12):2070-2095.
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 of fluoride bis-diphenyl acetylene liquid crystal and the liquid crystal property[J]. Chemical Production and Technology, 2014, 21(1):1-6, 24. (in Chinese)
樊能廷. 有机合成事典[M].北京:北京理工大学出版社, 1992:270-270. FAN N T. Handbook of Organic Synthesis[M]. Beijing:Beijing Institute of Technology Press, 1992:270-270. (in Chinese)
王勇丽, 杜琼, 王国华, 等. 亚甲氧基桥键弯曲型液晶合成与性能研究[J]. 有机化学, 2013, 33(9):2010-2015. WANG Y L, DU Q, WANG G H, et al. Synthesis and property of oxymethylene-bridged bent-core liquid crystals[J]. Chinese Journal of Organic Chemistry, 2013, 33(9):2010-2015. (in Chinese)
吕文海, 孟劲松, 髙红茹, 等. 一类多氟负介电液晶单体的合成及性能研究[J]. 液晶与显示, 2015, 30(1):39-46. LV W H, MENG J S, GAO H R, et al. Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds[J]. Chinese Journal of Liquid Crystals and Displays, 2015, 30(1):39-46. (in Chinese)
GOHAIN M, DU P M, VAN TONDER J H, et al. Preparation of phenolic compounds through catalyst-free ipso-hydroxylation of arylboronic acids[J]. Tetrahedron Letters, 2014, 55(13):2082-2084.
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