| abstract |
The invention discloses a cycloheptane derivative, a preparation method and application thereof. The general structural formula of the compound is shown in Formula I. The compound is stable to light and heat, has a wide nematic phase, a wide liquid crystal temperature range, good low-temperature mutual solubility, and good compatibility with other compounds, especially this compound has low rotational viscosity γ 1 and large medium Characteristics of electrical anisotropy (△ε>0). The synthesis of such compounds is of great significance for the development of monomeric liquid crystal compounds with low rotational viscosity γ1 and high dielectric anisotropy Δε. The liquid crystal mixture containing formula I has a wide temperature range of liquid crystal phase, low viscosity, suitable refractive index anisotropy and low starting voltage, which can improve the performance of liquid crystal composition materials and displays, and can achieve lower Threshold voltage and low rotational viscosity γ 1 are of great significance to realize the fast response of the display. |