申请人:Kobayashi Masahide
公开号:US08435422B2
公开(公告)日:2013-05-07
The subject is to provide a liquid crystal that has a high stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further has a large negative dielectric anisotropy and an excellent compatibility with any other liquid crystal compound. The invention provides the compound (1):
wherein, for example, R1 and R2 are hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons or alkenyloxy having 2 to 9 carbons; when one of the ring A1, the ring A2 and the ring A3 is 1,4-phenylene or 2,3-difluoro-1,4-phenylene, the other two are 1,4-cyclohexylene or 1,4-cyclohexenylene; and Z1 is a single bond, —(CH2)2—, —CH2O—, —OCH2—, —COO— or —OCO—.
本发明旨在提供一种液晶,该液晶具有对热、光等的高稳定性,具有宽的向列相温度范围,粘度较小,光学各向异性较大且适当的弹性常数K33,并且具有较大的负介电各向异性和与任何其他液晶化合物的良好相容性。本发明提供化合物(1):例如,其中R1和R2为氢,具有1至10个碳的烷基,具有2至10个碳的烯基,具有1至9个碳的烷氧基,具有2至9个碳的烷氧基烷基或具有2至9个碳的烯氧基;当环A1、环A2和环A3中的一个为1,4-苯撑或2,3-二氟-1,4-苯撑时,另外两个为1,4-环己撑或1,4-环己烯撑;且Z1为单键,—(CH2)2—,—CH2O—,—OCH2—,—COO—或—OCO—。