| abstract |
The present invention relates to cyclohexane derivatives cross-linked by CF 2 O, in particular, formula (I), R 1 -(-A 1 -Z 1- ) k1 -Q-CF 2 O-A 2 -(-Z 3 -A 3 —) K3 —R 2 , wherein Q represents a group (a), W 1 and W 2 independently represent —CH 2 — and / or —O—, and X 1 and X 2 , X 3 and X 4 are, independently of one another, H, F, —CH 3 — when at least one of the substituents X 1 , X 2 , X 3 and / or X 4 does not represent H. CH 2 F—CH 2 F and / or —CF 3 , Z 2 represents a single bond, —CH 2 —CH 2 — or —CF 2 —CF 2 —, m represents 0 or 1, R 1 , R 2 , A 1 , A 2 , A 3 , Z 1 , Z 3 , k1 and k3 have the meanings cited in the description. For the compounds represented. The invention further relates to liquid crystal materials, such as optical and electro-optical display elements. |