ZHANG Si-han, LIU Ke-qing, ZHANG Zhi-yong, ZHANG Kai-cheng, DAI Zhi-qun, XUAN Li. Synthesis and properties of fluorinated Phenylethynyltolane compounds[J]. , 2015,30(5): 769-776
ZHANG Si-han, LIU Ke-qing, ZHANG Zhi-yong, ZHANG Kai-cheng, DAI Zhi-qun, XUAN Li. Synthesis and properties of fluorinated Phenylethynyltolane compounds[J]. , 2015,30(5): 769-776 DOI: 10.3788/YJYXS20153005.0769.
Synthesis and properties of fluorinated Phenylethynyltolane compounds
More and more application requires faster response speed for nematic liquid crystal materials at present. There is a direct relationship between response speed and birefringence. The fluorinated phenylethynyltolane compounds(Ⅳ)with high birefringence
low melting point were synthesized. Their structures were determined by IR
1
H NMR
13
C NMR. The liquid crystalline properties were tested by DSC and POM. It shows that these compounds synthesized exhibit low melting point and broad temperature range of nematic phase(with the range about 100℃). These compounds exhibit high birefringence(
n
>
0.47) after being tested birefringence. These characters are particularly attractive for increasing response speed of liquid crystal materials and improve the optical properties of liquid crystal.
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references
高鸿锦,董友梅.液晶与平板显示技术[M].北京:北京邮电大学出版社,2007. Gao H J, Dong Y M. Liquid Crystals and Flat Panel Display Technology[M]. Beijing:Beijing University of Post and Telecommunications Press, 2007.(in Chinese)[2] Demus D,Goodbye J W,Gray G W,et al. Handbook of Liquid Crystals[M]. Weinhein:Wiley-VCH, 1998, 2B:835.[3] 杨傅子.近期液晶研究中的几个新方向-液晶非显示应用基础研究中的进展[J].物理学进展,2008,28(2):107-129. Yang F Z. New directions in recent liquid crystal studies--the progress in foundational research of non-display application of liquid crystal[J]. Progress in Physics,2008,28(2):107-129. (in Chinese)[4] 连佳.一维液晶光子晶体滤波器的研究[D].哈尔滨:哈尔滨工程大学,2009. Lian J. Research of the one-dimensional photonic crystal filter[D]. Harbin:Habin Engineering University,2009. (in Chinese)[5] 王新久.液晶光学与液晶显示[M].北京:科学出版社,2006. Wang X J, Liquid Crystal Optics and Liquid Crystal Display[M]. Beijing:Science Press, 2006. (in Chinese)[6] 彭增辉,刘永刚,姚丽双,等.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, 2011, 26(4):427-431. Peng Z H, Liu Y G, Yao L S, et al. Synthesis and liquid crystal properties of isothiocyanate tolane compounds[J]. Chinese Journal of Liquid Crystals and Displays, 2011, 26(4):427-431. (in Chinese)[7] 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[J].液晶与显示,2010,25(6):784-791. Sun L, Zhang Z Y, You H J, et al. Synthesis and low-temperature properties of lateral difluoro-diphenyltolane compounds[J]. Chinese Journal of Liquid Crystals and Displays, 2010, 25(6):784-791. (in Chinese)[8] Chizu S, Kazunori I, Naoto K, et al. Synthesis and properties of some novel high birefringence phenylacetylene liquid crystal materials with lateral substitutes[J]. Liquid Crystals, 2001, 28(8):1375-1387.[9] Gauza S, Parish A, Wu S T, et al. Physical properties of laterally fluorinated isothiocyanato phenyl-tolane single liquid crystals components and mixtures[J]. Mol Cryst Liq Cryst, 2008, 489:135-147.[10] Peer K.Fluorine in liquid crystal design for display applications[J].Journal of Fluorine Chemistry, 2015,177:29-36. [11] 徐海彬,赵冬冬,圣磊,等.液晶组合物及其应用:中国,CN103320143A[P].2013. Xu H B,Zhang D D,Sheng L,et al. Liquid crystal composition and its application:Chinese,CN103320143A[P] ,2013. (in Chinese)[12] Schoenberg A,Bartoletti I, Heck R F. Palladium-catalyzed carbonalkoxyation of aryl,benzyl and vinylic halides[J]. Journal Organic Chemistry, 1974,39(23):3318-3326.[13] 金志龙,曾育南,郑功龙,等.高双折射率液晶化合物及其组合物:中国,CN1927856A[P].2007. Jin Z L,Zeng Y N,Zheng G L,et al. Liquid crystal compounds and mixtures with high birefringence:Chinese,CN1927856A[P].2007. (in Chinese)[14] Li J H, Liang Y, Xie Y X. Efficient palladium-catalyzed homo-coupling reaction and sonogashira cross-coupling reaction of terminal alkynes under aerobic conditions[J]. J. Org. Chem.,2005,70:4393-4396.[15] Li Z H,Wong M S. Synthesis and functional properties of enddendromizedo-ligo(9,9-dipheryl)fluorenes[J]. Organic Letters,2006,8(7):1499-1502.[16] Leroux F R,Simon R,Nicod N. A highly efficient low temperature modification of the classical ullmann reaction[J]. Letters in Organic Chemistry,2006,10(3):948-954.[17] Takashi M,Yoshiaki S. Palladium-catalyzed sonogashira and hiyama reaction using phosphine-free hydrazone ligands[J]. J. Org.Chem.,2006,71:9499-9502.[18] Dunmur D, Fukuda A, Luckhurst G. Physical Properties of Liquid Crystals:Nematics[M]. London:the Institution of Electrical Engineers, 2001:515-517.