| 摘要 |
<p>The invention relates to thermochromic liquid crystalline phases with at least two components, characterized in that at least one component is an optically active compound of formula (I) wherein R?1 and R2¿ are each independently a chiral residue, importing to the phase a tight helical twist. α denotes a 1,4-phenylene group optionally substituted by fluorine, X?1 and X2¿ are each independently O or NH, n is 1, 2 or 3 and m is 0 or 1, which can be used in electro-optic devices, in temperature indicating devices or for colour-changing cosmetics.</p> |
