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    • 20. 发明公开
    • 스틸벤 유도체, 액정 혼합물 및 전기광학 디스플레이
    • 苯乙烯衍生物,液晶混合物和电光显示器
    • KR1020080053895A
    • 2008-06-16
    • KR1020070127475
    • 2007-12-10
    • 메르크 파텐트 게엠베하
    • 클라센-멤머멜라니브레머마티아스마나베아츠타카
    • C07C15/52C07C15/42C09K19/00G02F1/13
    • C09K19/16C09K19/3048C09K19/42C09K2019/0407C09K2019/0459Y10T428/10
    • A stilbene derivative is provided to realize characteristics preferred to be used in a liquid crystal medium, particularly for a VA display device, including a low specific voltage, large absolute value of dielectric anisotropy and optical anisotropy corresponding to specific applications. A stilbene derivative is represented by the following formula I. In formula I, each of R11 and R12 represents H, halogen, -CN, -SCN, -SF5, -CF3, -CHF2, -CH2F, -OCF3, -OCHF2, or a C1-C15 alkyl group mono-substituted with CN or CF3 or mono-substituted with halogen, wherein at least one CH2 of the alkyl group is optionally substituted with -O-, -S-, -CH=CH-, -CF=CF-, -CF=CH-, -CH=CF-, -CO-, -CO-O-, -O-CO- or -O-CO-O- in such a manner that O or S atoms are not directly bonded to each other; each of ring A11 and ring A12 represents (a) trans-1,4-cyclohexylene radical, wherein one or two non-adjacent CH2 groups are optionally substituted with -O- and/or -S-, (b) 1,4-cyclohexenylene radical, (c) 1,4-phenylene radical, wherein one or two non-adjacent CH groups are optionally substituted with N, (d) a radical selected from naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or (e) a radical selected from 1,4-bicyclo[2.2.2]-octylene, 1,3-bicyclo[1.1.1]pentylene and spiro[3.3]-heptane-2,6-diyl, wherein at least one -CH2- group in (a) and (b) is optionally substituted with -CHF- or -CF2-, and at least one -CH= group in (c) and (d) is optionally substituted with a group selected from -C(F)=, -C(Cl)=, -C(Br)=, -C(CN)=, -C(CH3)=, -C(CH2F)=, -C(CHF2)=, -C(OCH3)=, -C(OCHF2)= and -C(OCF3)=; each of Z11 and Z12 represents a single bond, -CH2-CH2-, -CF2-CH2-, -CH2-CF2-, -CF2-CF2-, -CH=CH-, -CF=CF-, -CF=CH-, -CH=CF-, -C=C-, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O-, -OCF2- or a combination thereof, wherein two oxygen atoms are not directly bonded to each other; each of m and n is 0, 1 or 2, with the proviso that (m+n) is 0, 1 or 2.
    • 提供了一种1,2-二苯乙烯衍生物,以实现优选用于液晶介质,特别是用于VA显示装置的特性,包括低比电压,绝对值绝对值大,介电各向异性大,对应于具体应用的光学各向异性。 二苯乙烯衍生物由下式I表示。在式I中,R 11和R 12各自表示H,卤素,-CN,-SCN,-SF 5,-CF 3,-CHF 2,-CH 2 F,-OCF 3,-OCHF 2或 被CN或CF 3单取代或被卤素单取代的C1-C15烷基,其中烷基的至少一个CH2任选被-O - , - S - , - CH = CH-,-CF = CF-,-CF = CH-,-CH = CF-,-CO-,-CO-O-,-O-CO-或-O-CO-O-,使得O或S原子不直接 相互粘合; 环A11和环A12各自表示(a)反式-1,4-亚环己基,其中一个或两个不相邻的CH 2基团任选被-O-和/或-S-取代,(b) 亚环己烯基,(c)1,4-亚苯基,其中一个或两个不相邻的CH基任选被N取代,(d)选自萘-2,6-二基,十氢萘-2,6-二基 和1,2,3,4-四氢化萘-2,6-二基,或(e)选自1,4-二环[2.2.2] - 亚辛基,1,3-双环[1.1.1]亚戊基和 螺[3.3] - 庚烷-2,6-二基,其中(a)和(b)中的至少一个-CH 2 - 基团任选被-CHF-或-CF 2 - 取代,并且至少一个-CH =基团在 (C)和(d)任选地被选自-C(F)=,-C(Cl)=, - C(Br)=,-C(CN)=,-C(CH 3) -C(CH 2 F)=, - C(CHF 2)=, - C(OCH 3)=, - C(OCHF 2)=和-C(OCF 3) Z11和Z12各自表示单键,-CH2-CH2-,-CF2-CH2-,-CH2-CF2-,-CF2-CF2-,-CH = CH-,-CF = CF-,-CF = CH - , - CH = CF - , - C = C - , - COO - , - OCO - , - CH 2 O - , - OCH 2 - , - CF 2 O-,-OCF 2 - 或其组合,其中两个氧原子不直接键合 对彼此; m和n各自为0,1或2,条件是(m + n)为0,1或2。