| 摘要 |
The invention is to provide a liquid crystal compound having a large dielectric anisotropy, a high voltage holding ratio and stability to heat, light and so forth, maintaining a nematic phase in a wide temperature range, having a suitable optical anisotropy and an excellent compatibility with other liquid crystal compounds, particularly, to provide a liquid crystal compound having a large dielectric anisotropy. The invention provides compound (1):
In the formula, for example, R 1 is alkyl and having 1 to 20 carbons; ring A 1 , ring A 2 , ring A 3 , ring A 4 , ring A 5 and ring A 6 are independently 1,4-cyclohexylene or 1,4-phenylene; Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 and Z 7 are independently a single bond, - (CH 2 ) 2 -, -COO-, -OCO-, CF 2 O-, -OCF 2 - or -CH=CH-; X 1 is fluorine, -CF 3 or -OCF 3 ; and Y 1 and Y 2 are independently hydrogen or fluorine. |
