Anisotropic organic compounds

Details Anisotropic organic compounds Anisotropic organic compounds

C - Chemistry, Metallurgy

07

C

C07C 331/28 (2006.01) C07C 255/49 (2006.01) C07C 255/50 (2006.01) C07C 255/55 (2006.01) C07C 323/62 (2006.01) C07C 323/63 (2006.01) C07C 331/08 (2006.01) C07D 333/20 (2006.01) C07D 333/24 (2006.01) C07D 333/36 (2006.01) C09K 19/12 (2006.01) C09K 19/18 (2006.01) C09K 19/20 (2006.01) C09K 19/34 (2006.01)

Patent

CA 2082800

2082800 9216519 PCTABS00016 The invention describes liquid crystalline compounds of formula (I), where A, D and G are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, B and E are independently selected from a single bond C=C, C=C, C00, azoxy and diazo, k and m are independently selected from 1 and 0, such that m+n is 1 or 2, and R1 and R2 are independently selected from R, R0, alkynyl, thioalkyl, hydrogen, CN, NCS and SCN; provided that at least one of R1 and R2 is selected from CN, NCS and SCN and that at least one of A, D and G is phenyl; and excluding where at least one of R1 and R2 is independently selected as CN and one of A, D or G is not thiophene, and where m is 0, A, and D are phenyl, B is a single bond and only one of R1 or R2 is NCS. Also described are compounds suitable for inclusion in a device utilising pretransitional characteristics of liquid crystalline materials in the isotropic phase, of general formula (II) where J and Y are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, X is selected from C=C, C=C, COO, azoxy and diazo, k is 1 or 0 and R3 and R4 are independently selected from R, RO, alkynyl, thioalkyl, hydrogen, CN, NCS and SCN; provided that at least one of R3 and R4 is selected from CN, NCS and SCN and that at least one of J and Y is phenyl.

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