| 摘要 |
Fluorine-containing aromatic compounds of the formula I <IMAGE> I in which R1 is alkyl having up to 12 C atoms or alkenyl having 2 to 12 C atoms, Q1 and Q2 are each, independently of one another, -O- or a single bond, and one of the radicals Q1 and Q2 is alternatively trans-1,4-cyclohexylene, T1 is <IMAGE> T2 is <IMAGE> R2 is F, Cl, -CF3, -OCF3, -OCHF2 or one of the meanings of R1, and L1, L2, L3 and L4 are each H or F, are suitable as components of liquid-crystalline phases for IR shutters.
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