| abstract |
Two or three different nematic cpds. of the general formula (I) are mixed together in the molar ratio of 2 (lowest melting cpds) to 1 (higher melting cpds.) or 1:1:1. In formula (I), A beta an azo, azoxy, azomethine or ester gp. and R and R' are straight chain alkyl, alkoxy or acyloxy gps. with up to 10 C atoms, or CN-gps., The title mixtures are used as fluid anisotropic dielectrics for electronic applications or as solvents for investigating direction-dependent molecular properties. Advantage is that the mixtures remain nematic at very low temps and possess a very wide meso phase. |