Synthesis and Low-temperature Properties of New Difluoroozymethylene-bridged Liquid Crystal Compounds with Three Rings
In this paper, twelve kinds of difluorooxymethylene-bridged liquid crystals were designed and synthesized, that nine of them are new compounds(II). The molecular structure of these compounds were tested with IR, 1H NMR, 13C NMR, 19F NMR, MS and DSC. We also tested and analyzed the viscosities of such compounds at different temperature. It is found that they had lower viscosity and smaller temperature dependence at low temperature. End-group structures has a great influence on the viscosity in the correlative compounds. Such as the compounds with 3,4,5-trifluorophenoxyl group exhibit the lowest viscosity. The low-temperature viscosities of this type of three-ring structure compounds were lower than that of two-ring ester liquid crystal compounds. It is one kind of ideal liquid crystal compounds with great potential to enhance the twise nematic phase and to reduce response time of LCD.
difluoroozymethylene-bridged LC compounds synthesis low-temperature viscosity temperature dependence
Meng-Meng Deng Zhi-Yong Zhang Zhiqun Dai Li Xuan Ran Zhang
Department of Chemistry and Environmental Engineering, Wuhan Polytechnic University,Wuhan, 430023, C Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science Changchun, 130
国际会议
The 11th Asian Symposium on Information Display(ASID09)(第11届亚洲信息显示会议)
广州
英文
195-200
2009-10-07（万方平台首次上网日期，不代表论文的发表时间）