Polyfunctional intermediates for the preparation of liquid-crystalline and anisotropic materials

Abstract

This paper describes the polyfunctional intermediates for the preparation of various anisotropic and liquidcrystalline 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.

Three in one: Mesogenic aromatic acid as a liquid crystal matrix, a chiral dopant in liquid crystals and a stabilizer for nanoparticles

“…The choice of that compound is dictated by the following reason: several chiral lactic acid derivatives have been studied before [25,26] and their liquid crystal structure was proven. We have reported in [25] on the synthesis of derivatives of natural chiral Llactic acid namely by the interaction of the corresponding substituted hydroxybiphenyls, hydroxyterphenyls and hydroxyquaterphenyls with (-) ethyl L-lactate.…”

“…R-MPA(1)) was prepared from the corresponding 3,6-disubstituted cyclohex-2-enone (4) according to published methods [24][25][26] . The schema of the synthesis of mesogeniclike R-MPA is given in Figure 1.…”

“…With the goal of placing chiral carboxylic acid ligands R-MPA on the surface of CdSe NPs via postsynthetic ligand exchange, we synthesized CdSe NPs with carboxylate bound oleic acid fragment as described in [25].…”

Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals

“…PDLC films based on the nematic LC 4-pentyl-4'-cyanobiphenyl (5CB) (Merck), the polymer polyvinyl alcohol (PVA) (Mowiol 28-99, Aldrich) plasticized with a glycerin, the cationic surfactant CTAB (Sigma) and the anionic surfactant 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA, see Fig. 1) have been produced and studied [28].…”

Anisotropic Derivatives of (–)-L-lactic Acid and Nanocomposites on their Basis

“…В процессе дальнейших исследований также было установлено, что 3,6-дизамещенные цикло-гекс-2-еноны (Iа, б) под действием различных реа-гентов, претерпевая ароматизацию, могут превра-щаться в разнообразные производные дифенила, терфенила и кватерфенила (VIII-XI) [11][12][13] (рис. 2).…”