LIQUID CRYSTAL COMPOUND HAVING XANTHENE SKELETON AND EXHIBITING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:JNC CORPORATION
公开号:US20160068754A1
公开(公告)日:2016-03-10
A liquid crystal compound satisfies at least one of physical properties such as a high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a suitable elastic constant and an excellent compatibility with other liquid crystal compounds.
The compound is represented by formula (1).
In the formula, for example, R
1
and R
2
are alkyl having 1 to 15 carbons; ring A
1
and ring A
2
are 1,4-cyclohexylene or 1,4-phenylene, Z
1
and Z
2
are a single bond, —(CH
2
)
2
—, —CH═CH—, —C≡C—, —COO—, —OCO—, —CH
2
O—, —OCH
2
—, —CF
2
O—, —OCF
2
— or —CF═CF—, a and b are 0, 1 or 2, and a sum of a and b is 1 or 2.