Thirty-eight non-substituted and laterally fluoro-substituted 4-nitro-, 4-isothiocyanato-, 4-fluoro-, 4-trifluoromethyl- and 4-trifluoromethoxyphenyl 4-(5-alkyl-1,3,2-dioxaborin-2-yl) benzoates have been synthesized and their phase transition temperatures and enthalpies of transition measured. The influences of both terminal and lateral substituents in both benzene rings (in the acidic and phenolic moieties) on the phase transition temperatures in general and on the stability of the smectic A phase in particular are compared. The clearing points of the compounds (a), the thermal stability of the smectic A phase (b) and the tendency to form a smectic A phase (c) decrease in the following way: Substitution of the central benzene ring by a fluorine atom effectively depresses the smectic A phase. The influence of 4-(5-alkyl-1,3,2-dioxaborin-2-yl)benzoates as components of nematic mixtures on their viscosity, optical and dielectric anisotropy and electro-optical properties is discussed.

This paper describes the polyfunctional intermediates for the preparation of various anisotropic and liquid-crystalline compounds with different combinations of cyclic, bridge, terminal fragments and lateral substituents. Both chiral and nonchiral nematic, smectic mesomorphic and anisotropic compounds can be prepared by the transformations of the corresponding 3,6-disubstituted cyclohex-2-enones, trans-2,5-disubstituted cyclohexanones, 3,5-disubstitiuted 2-isoxazolines, substituted cyclohex-2-enonyl 2-isoxazolines, 1,2-disubstitiuted cyclopropanols and substituted unsaturated epoxyketones.

(2018). Anisotropic derivatives of (-)-L-lactic acid and their nanocomposites. Liquid Crystals: Vol. 45, No. 8, pp. 1223-1233.

This paper describes the synthesis and mesomorphic properties of some new liquid crystalline quaterphenyl and cyclohexylterphenyl derivatives – the Ferroelectric liquid crystal (FLC) compositions based upon them. The FLC compositions containing the new quaterphenyl derivatives are characterised by a wide temperature range of the Sm-C* phase, a low operating voltage and a very good quality of orientation in the cells (thermal and the mechanical stable ‘shock-free’).

We describe the synthesis and physical-chemical properties of new anisotropic derivatives of terphenyl. They have been prepared by the modification of corresponding 3,6-disubstituted cyclohex-2-enone and the interaction with ethyl ester of 6-bromohexanoic acid. The synthesised compounds: 4ʹʹ-((1s, 4r)-4-butylcyclohexyl)-2ʹ-chloro-[1,1ʹʹ:4ʹ,1ʹʹ-terphenyl]-4-ol (TERPh-OH), 6-((4ʹʹ-((1s, 4r)-4-butylcyclohexyl)-2ʹ-chloro-[1,1ʹ:4ʹ,1ʹʹ-terphenyl]-4-yl)oxy)hexanoic acid (TERPh-COOH) and 8-((4ʹʹ-((1s, 4r)-4-butylcyclohexyl)-2ʹ-chloro-[1,1ʹ:4ʹ,1ʹʹ-terphenyl]-4-yl)oxy)oct-1-en-3-one (TERPh-VK) were used for the preparation of liquid crystals and their properties were studied. TERPh-COOH is capable of interacting with inorganic nanoparticles providing thus a tool for the creation new nanocomposite materials. TERPh-VK demonstrates the ability to polymerise with the formation of a LC polymer. Graphical Abstract