Patent ID: 7083832

Claim:
A liquid crystal composition comprising a compound of the formula: wherein: x is 0 or 1; R is C n F 2n+1 C m H 2m , where m is an integer greater than 3and less than or equal 10; and n is an integer from 1 to 10 and m+n is less than or equal to 20; d is 0 or 1; each of A 1 , A 2 , A 3 , A 4 , B 1 , B 2 , B 3 , B 4 , C 1 , C 2 , C 3 , and C 4 is independently CH, N, or CF, provided no more than 2 of A 1 , A 2 , A 3 , and A 4 is N, no more than 2 of B 1 , B 2 , B 3 , and B 4 is N, and no more than 2 of C 1 , C 2 , C 3 , and C 4 is N; D is —C(═O)O—, —OC(═O)—, —CH 2 —CH 2 —, —CH═CH— or —C≡C—; Y is an alkyl or fluorinated alkyl group having from one to six carbon atoms; and R 1 is a straight chain C 2-12 alkyl, C 2-12 alkenyl or C 2-12 alkynyl containing at least one Si atom, where one or more non-neighboring CH 2 groups can be replaced with —O—, —S—, —Si(R′) 2 —, —Si(R′) 2 —(CH 2 ) p —Si(R′) 2 —, where p is an integer ranging from 1 to 6, —Si(R′) 2 —O—, or —Si(R′) 2 —O—Si(R′) 2 —O—, wherein each R′ is independently alkyl or fluorinated alkyl.