Polymerizable mesogenic tolans

摘要

A polymerizable mesogenic tolan is provided of formula I wherein P, Sp, X, n, A1, A2, Z1, Z2, m1, m2, L1, L2, rand R have the meaning given below. There are also provided polymerizable liquid crystal compositions comprising at least one compound of formula I; linear or crosslinked liquid crystal polymers obtainable from these compounds and compositions; and the use of such compounds, polymerizable compositions and polymers in optical elements such as polarizers, retardation and compensation films, alignment layers, colour filters or holographic elements, in liquid crystal displays such as PDLC, polymer gel or polymer stabilized cholesteric texture (PSCT) displays, in adhesives, synthetic resins with anisotropic mechanical properties, cosmetics, diagnostics or liquid crystal pigments, for decorative and security applications, and for nonlinear optics or optical information storage.