High tilted antiferroelectric liquid crystalline materials

Current Topics in Smectic Liquid Crystal Research

“…[103][104][105] Lately, the orthoconic effect has also been found in several other materials (some of them are depicted in Table 3), quite different from the initially used mixture (which will be discussed in more detail below): in bent-core mesogens, [106,107] in a bistereogenic AFLC (M7BBM7) structurally related to MHTAC, [90] in a "twin AFLC mesogen" compound (BMHBOP-8), [88] and recently also in a siloxane bimesogen (Br11-3-11Br). [94] Siloxane bimesogens are actually some of the best-studied, high-tilt AFLCs, which have been investigated repeatedly since 1997.…”

Comparative electrooptic study of new orthoconic liquid crystals with fluorinated alkoxy terminal chains

“…The main drawback of all measured materials for high−rate multiplexed schemes is their high switching voltage, more than 40 V. The new mixture W242 shows the best dynamic and static results among investi− gated OAFLCs mixtures. It also shows better electrooptical properties if compared with previously OAFLC mixture W193B [4,5]. This material has good electrooptical respon− se, the dynamic range of about DR (10-90) = 8 V and good relaxation time.…”

“…However, these exhibited a very short helical pitch at room temperature, usually less than 1 μm. In this case, surface stabilized struc− tures are only possible to achieve if the material is confined into very thin cells (~0.8 μm) [4,5] where n = 1-7 and m = 2-7.…”

Effect of fluorination of molecular rigid core in liquid crystal biphenyl benzoate based homologous series

“…Among others, those compounds having a molecular rigid core and build up from biphenyl benzoates exhibit low temper− ature, wide range, near orthoconic antiferroelectric smectic phase even they are having very different aliphatic chains at− tached at terminal positions [3]. A homologous series with protonated and perfluorinated aliphatic chain have been syn− thesized and investigated [4].…”