| 摘要 |
Compounds that are useful in compositions for flat panel displays, for example, are provided. The compounds provided are polar, and are useful in low threshold voltage mixtures. The compounds provided have the general structure: CpCOCH<SUB>2</SUB>[A]<SUB>n</SUB>Z<SUB>1</SUB>[B]<SUB>m</SUB>Z<SUB>2</SUB>PhX<SUB>1</SUB>X<SUB>2</SUB>Y, where CpCOCH2 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; n and m are independently in each instance 0, 1 or 2; Z<SUB>1 </SUB>and Z<SUB>2 </SUB>are independently a single bond, -(CH<SUB>2</SUB>)<SUB>2</SUB>-, CF<SUB>2</SUB>O, OCF<SUB>2</SUB>, CH<SUB>2</SUB>O, OCH<SUB>2</SUB>, -C≡C-, COO, OOC; and Y is selected from the group consisting of: F, Cl, CN, OCH<SUB>2</SUB>F, CHF<SUB>2</SUB>, OCF<SUB>3</SUB>, and CF<SUB>3</SUB>.
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