A cycloheptane derivative as represented by formula (I), and preparation method and use thereof; the compound has photostability and thermostability, wide nematic phase and liquid crystalline state temperature range, and good low-temperature intersolubility, and particularly has low rotary viscosity γ
1
and good dielectric anisotropy (Δ∈>0).
一种由式(I)表示的
环庚烷衍
生物,其制备方法和用途;该化合物具有光稳定性和热稳定性,宽的向列相和
液晶状态温度范围,良好的低温相容性,特别是具有低旋转粘度γ1和良好的介电各向异性(Δ∈>0)。