Liquid crystal molecules comprising hydroazulene structures

Details Liquid crystal molecules comprising hydroazulene structures Liquid crystal molecules comprising hydroazulene structures

C - Chemistry, Metallurgy

09

K

C09K 19/32 (2006.01)

Patent

CA 2610939

Liquid Crystal Molecules Comprising Hydroazulene Structures Compounds of formula (I); R1 i - A1 i - (Z2 i - A2 i )m - (Z3 i - A3 i )n- (Z4 i-A4 i)o- R2 i (i) wherein at least one of the divalent groups Ai is derived from at least partially hydrogenated azulene, R1 i and R2 i being hydrogen, an optionally substituted alkyl or alkylene residue, R2 i also standing for -CN, -N=C=S, -F, -Cl, -SF5, -CF3, -CHF2, CH2F-O-CF3,-O-CHF2, -O-CH2F, -O-CF2-CF2H, or -O-C2F5, A1 i, A2 i, A3 i and A4 i being partially or completely hydrogenated 2,6- azulene, trans-l,4-cyclohexylene, 1,4-cydohexenylene, 1,4-phenylene, 2-fluoro- 1,4-phenylene, 3-fluoro-1,4-phenylene, 2,3- and 2,6- difluoro-1,4-phenylene, and 3,5-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, and 1,4-dioxane-2,5-diyl, Z1 i, Z2 i, Z3 i and Z4 i being a single bond, -CH2-CH2-,-CF2-CF2-, an ester bond -CO-O-, trans -CH=CH-, -C.ident.C-, and -CF2-O-, m, n and 0 being independently 0, 1, or 2, liquid crystal media comprising these compounds and liquid crystal displays made with mixtures comprising the novel compounds.

Molécules de cristaux liquides comprenant des composés ayant des structures d'hydroazulènes de formule (I) : R1 i - A1 i - (Z2 i - A2 i )m - (Z3 i - A3 i )n- (Z4 i-A4 i)o- R2 i (I) où au moins l'un des groupes divalents Ai est dérivé d'un azulène au moins partiellement hydrogéné, R1 i et R2 i étant un hydrogène, un résidu d'alkyle ou d'alkylène facultativement substitué, R2 i représentant également -CN, -N=C=S, -F, -Cl, -SF5, -CF3, -CHF2, CH2F-O-CF3,-O-CHF2, -O-CH2F, -O-CF2-CF2H ou -O-C2F5, A1 i, A2 i, A3 i et A4 i étant un 2,6-azulène, trans-1,4-cyclohexylène, 1,4-cyclohexénylène, 1,4-phénylène, 2-fluoro-1,4-phénylène, 3-fluoro-1,4-phénylène, 2,3- et 2,6-difluoro-1,4-phénylène et 3,5-difluoro-1,4-phénylène, partiellement ou complètement hydrogéné, un pyrimidine-2,5-diyle et un 1,4-dioxane-2,5-diyle, Z1 i, Z2 i, Z3 i et Z4 i étant une simple liaison, -CH2-CH2-,-CF2-CF2-, une liaison ester -CO-O-, trans-CH=CH-, -C.ident.C- et -CF2-O-, m, n et o étant indépendamment 0, 1 ou 2 ; milieux à cristaux liquides comprenant ces composés et afficheurs à cristaux liquides fabriqués avec des mélanges comprenant les nouveaux composés.

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