Patent ID: 7427693

Claim:
A liquid crystal having the formula: CpCOCH 2 [A] n Z 1 [B] m Z 2 PhX 1 X 2 Y where CpCOCH 2 is the structure: A and B are independently in each instance selected from the group consisting of 1,4-cyclohexane, 1,4-phenyl, 1,3-dioxan-5,2-diyl; pyridine-5,2-diyl; and pyrimidin-5,2-diyl; Ph can be optionally independently substituted with one or two halogens in addition to the X 1 , X 2 and Y substituents; n and m are independently in each instance 0, 1 or 2; Z 1 and Z 2 are independently in each instance a single bond, —(CH 2 ) 2 —, CF 2 O, OCF 2 , CH 2 O, OCH 2 , —C≡C—, COO and OOC; Y is selected from the group consisting of: F, Cl, CN, OCH 2 F, CHF 2 , OCF 3 , and CF 3 ; and X 1 and X 2 are each independently H or F.