Ferrocene-containing liquid crystals

The review concerns liquid-crystalline mono- and disubstituted ferrocenes, systems based on ferrocenophane, heteronuclear complexes with ferrocene-containing ligands, ferrocene-based polymers and dendrimers, as well as mixed systems based on ferrocene derivatives. It is shown that liquid-crystalline ferrocene exhibits unique physical properties. The state of the art in the title field and prospects for the development of research on such liquid crystals are outlined and the present and possible fields of their application are discussed. The bibliography includes 131 references.