| 摘要 |
Siloxane compounds having a smectic liquid crystal phase and the general formula <IMAGE> I wherein each R=alkyl, alkenyl or aryl, Q represents a monovalent group, for example alkyl, -(CH2)nOM', a chiral organic group, a dye group, a non-linear optic group or the group -(CH2)nL, in which L represents a siloxane group, M and M' each represent <IMAGE> wherein A is carboxyl, T is CN, F or Cl and p=0 or 1, provided that when T is F or Cl x has a value of at least 2.
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