Handbook of Liquid Crystals

Chiral liquid‐crystalline 3,6‐disubstituted cyclohex‐2‐enones and their derivatives and the FLC compositions based upon them

“…The efficiency of the cyclic fragment incorporated into the molecular core of the four-ring compounds can be expressed by the following orders of increasing of the spon- taneous polarization P s and the switching angle Θ of the structure (4). It should be noted that the introduction of an additional benzene ring also leads to the increasing of the spontaneous polarization P s and the switching angle Θ.…”

“…However, hysterisis free/transmission voltage curves and Vshaped or thresholdless switching are observed for them and for their FLC mixtures with one another over wide temperature ranges and at different frequencies (see Figs. [3][4][5].…”

“…It has been shown that even small structural changes of the molecules forming mesophases lead to the considerable changes of their physico-chemical properties and the electro-optical parameters of the compositions based upon them. [1][2][3][4][5] One of the useful methods for the creation of new liquid-crystalline structures with the desirable characteristics is the lateral substitution of the molecular core by halogen, alkyl, alkoxy and other groups. [6][7][8][9] It has been reported that 3,6-disubstituted cyclohex-2-enones are promising intermediates for the preparation of liquid-crystalline compounds.…”

Control of the Folding Dynamics of Self‐Reconfiguring Magnetic Microbots Using Liquid Crystallinity

“…Within the LC, molecules exhibit long-range orientational order, indicated by the director n ( Figure 1), leading to anisotropic elasticity and viscosity. [18,19] We investigated how the LC controls the dynamics of an emergent class of reconfigurable materials that we refer to as "microbots," which are formed by the directed assembly of patchy magnetic microcubes (Figure 1a). [20] When individually dispersed patchy microcubes are exposed to a uniform magnetic field (H ⇀ ¼ 70 G) in the plane of an optical cell that contains them, the cobalt films (black surface in Figure 1a) along one side of each microcube attain a permanent magnetic dipole that guides their assembly into chains with an angle δ between their dipoles (arms) of 180 (red arrows in Figure 1b).…”

A broadband circularly polarized film

“…Developing LCDs is a fascinating and multidisciplinary approach. 3,4 Consequently, merely offering a thin, lightweight, and inexpensive model is no longer of interest to consumers and its survivability in the marketplace. Considerable improvements have been made in recent years, including enhanced brightness, a wider viewing angle, a high-speed response, and higher-precision colors.…”