Biphenyl esters and liquid crystal materials and devices...

Details Biphenyl esters and liquid crystal materials and devices... Biphenyl esters and liquid crystal materials and devices...

C - Chemistry, Metallurgy

07

C

31/105, 260/474,

C07C 69/78 (2006.01) C07C 69/96 (2006.01) C09K 19/20 (2006.01) C09K 19/30 (2006.01) C09K 19/42 (2006.01) C09K 19/46 (2006.01)

Patent

CA 1338988

Biphenyl esters are provided of the formula: Image wherein Image represents Image or Image , R1 represents C3 - C12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy, j is 0 or 1, R2 represents C3 - C12 alkyl or alkoxy, one of Q1 or Q2 is fluorine and the other is hydrogen, provided that when j is 0 and Image is Image and both R1 and R2 are n-alkyl, then the total number of carbon atoms in R1 and R2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase, and a number of such mixtures are described.

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