Magnetic susceptibilities and the order parameters of some 4,4' -disubstituted biphenyl cyclohexanes

Abstract

The diamagnetic susceptibilities of some 4,4'-disubstituted biphenyl cyclohexanes are reported as a function of temperature. The order parameters of the uniaxial nematic, smectic A and smectic B phases are calculated. The effect of the terminal substituents and the central groups on the magnetic anisotropy and the order parameter is discussed

Halogenation in achiral liquid crystals: terminal and linking substitutions

“…[38]). It is interesting to note that the order parameter, depending on the terminal substituent for compounds In contrast to the results received for biphenyls and phenylcyclohexanes , the terminal halogenation of 11-1-11-3, 12-16, 12-17, grows as follows [42]: F < H < Cl < Br < CN. two -ring heterocyclic derivatives of pyridin -2,5 -diyl, pyrimidin-2,5-diyl and trans-1,3-dioxan-2,5-diy l has a…”

LC Vision: The Application to Magnetic Material Domains Investigations

“…[10]. For decreasing the period of exposition and increasing H-field sensitivity the new rare earth-containing liquid crystal with large magnetic anisotropy Dv have been synthesized [11].…”

Synthesis and Characterization of Novel All-Organic Liquid Crystalline Radicals

“…The former metallomesogens can have a large paramagnetic susceptibility anisotropy (Dv para ) which originates from the d-or f-metal ion and seems advantageous to the orientation control of LC molecules by magnetic fields [3][4][5][6]. On the other hand, the latter organic mesogens are appropriate for the LC spin probes to investigate the orientation of the diamagnetic organic LCs, due to their low viscosity and very small Dv para which does not disturb the Dv dia -controlled orientation of diamagnetic organic liquid crystals [7], if the spin source moiety is fixed in the mesogen core so as to avoid the free rotation inside the molecule.…”