C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 331/28 (2006.01) C07C 255/49 (2006.01) C07C 255/52 (2006.01) C07C 255/54 (2006.01) C07C 323/62 (2006.01) C07C 323/63 (2006.01) C07C 331/08 (2006.01) C07D 213/30 (2006.01) C07D 239/26 (2006.01) C07D 333/20 (2006.01) C07D 333/24 (2006.01) C09K 19/32 (2006.01) C09K 19/34 (2006.01)
Patent
CA 2082798
2082798 9216500 PCTABS00016 Liquid crystal compounds of formula (I) are described, where formula (I) is given as R1 -A-(X)m-(B)n-R2 where A is selected from nathyl, fluorinated naphthyl, brominated naphthyl, B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R1 and R2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, X is selected from C=C, COO and C=C, m is 0 or 1, n is 0 or 1 where m is 1 and n is 0 where m is 0; provided that where A is naphthyl, n is 1 and m is 0 then B is selected from methylated phenyl, brominated phenyl, thiophene, pyrimidine and pyridine; and further provided that where A is naphthyl, X is C=C, m is 1 and n is 1, then B is selected from thiophene, pyrimidine and pyridine. Also described are liquid crystal compounds suitable for inclusion in devices utilising pretransitional characteristics of liquid crystalline materials in the isotropic phase and described by formula (II): R3-J-(Y)p-(Z)q-R4, where J is selected from nathyl, fluorinated naphthyl, brominated naphthyl, Z is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R1 and R2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, Y is selected from C=C, COO and C=C, p is 0 or 1, q is 0 or 1 where p is 1 and q is 0 where p is 0.
Day Sally Elizabeth
Goodby John William
Gray George William
Harrison Kenneth John
Hird Michael
Fetherstonhaugh & Co.
The Secretary Of State For Defence In Her Britannic Majesty's Go
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