Liquid crystal compound having lactone ring, liquid crystal composition, and liquid crystal display device
申请人:Goto Mayumi
公开号:US20070108410A1
公开(公告)日:2007-05-17
A nematic liquid crystal compound represented by any one of formulas (a-1) to (a-6):
in formulas (a-1) to (a-6), Ra and Rb are each independently hydrogen or alkyl having 1 to 10 carbons, provided that in the alkyl, —CH2- may be replaced by —O—, —(CH2)2- may be replaced by —CH═CH—, and hydrogen may be replaced by a halogen; ring A1 and ring A2 are each independently trans-1,4-cyclohexylene or 1,4-phenylene, provided that in these rings hydrogen may be replaced by a halogen, and in the case where the ring is trans-1,4-cyclohexylene, —CH2- may be replaced by —O—, and —CH2CH— may be replaced by —CH═C—; and Z1 and Z2 are each independently a single bond, —COO—, —OCO—, —OCH2-, —CH2O— or —CH2CH2-, provided that in formula (a-3), in the case where ring A2 is trans-1,4-cyclohexylene, Z2 is a single bond, —COO—, —OCO—, —OCH2- or —CH2O—, in the case where Ra is —C3H7, Rb is —OC2H5, and Z2 is a single bond, ring A2 is trans-1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 2-fluoro-3-chloro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene or 2,3-dichloro-1,4-phenylene, and in formula (a-4), in the case where ring A1 is trans-1,4-cyclohexylene, Z1 is a single bond, —COO—, —OCO—, —OCH2O—.
任何一个式子(a-1)到(a-6)所代表的向列相液晶化合物:
在式子(a-1)到(a-6)中,Ra和Rb各自独立地代表氢或有1到10个碳的烷基,其中在烷基中,-CH2-可以被- O-代替,-(CH2)2-可以被-CH═CH-代替,氢可以被卤素代替;环A1和环A2各自独立地代表反式1,4-环己烷基或1,4-苯基,其中在这些环中,氢可以被卤素代替,在环为反式1,4-环己烷基的情况下,-CH2-可以被-O-代替,而-CH2CH-可以被-CH═C-代替;Z1和Z2各自独立地代表单键,-COO-,-OCO-,-OCH2-,-CH2O-或-CH2CH2-,其中在式子(a-3)中,在环A2为反式1,4-环己烷基的情况下,Z2为单键,-COO-,-OCO-,-OCH2-或-CH2O-,在Ra为-C3H7,Rb为-OC2H5,且Z2为单键的情况下,环A2为反式1,4-环己烷基,1,3-二氧六环基,2-氟-1,4-苯基,3-氟-1,4-苯基,2-氟-3-氯-1,4-苯基,2-氯-3-氟-1,4-苯基或2,3-二氯-1,4-苯基,在式子(a-4)中,在环A1为反式1,4-环己烷基的情况下,Z1为单键,-COO-,-OCO-,-OCH2O-。