The Synthesis and Properties of Fluoroterphenyls for High Dielectric Biaxiality Ferroelectric Liquid Crystal Mixtures

Banana‐shaped and other bent‐core liquid crystals

“…During the late 1980s and early 1990s, much research was conducted in the area of generating materials for ferroelectric applications, and one of the largest programmes involved the synthesis of ferroelectric host materials and chiral dopants to generate ferroelectric mixtures of high dielectric biaxiality [49][50][51][52][53][54][55][56]. In order to achieve this goal host materials of very high negative dielectric anisotropy were required, and this was best achieved by the use of materials with two lateral fluoro substituents inherently fixed on one side of the molecule (e.g., compound 47) [49].…”

Synthesis and physical properties of difluoroterphenyl ferroelectric liquid crystal with mixed alkenyloxy‐ester terminal ends

“…In a 500 ml previously dry-flamed three necked flask, 25 g (0.1244 mol) of compound 1 and 150 ml dried THF were mixed and stirred thoroughly. The system was then continuously purged with N 2 and placed in a dry-ice/ acetone bath, 278uC [23]. Into this flask 65 ml of 2.5 M BuLi (0.1625 mol) was added immediately but slowly through a dropping funnel.…”

Mesomorphic properties of liquid crystalline compounds with chalconyl central linkage in two phenyl rings

“…The chalconyl derivatives, due to their geometrical shapes, may exhibit LC properties with lower thermometric transitions and bioactivity. The aims and objectives of this article are to study the effect of the molecular structure on the LC properties and behaviours [2][3][4][5][6] as a result of molecular flexibility, keeping the molecular rigidity unaltered throughout a series and changing their flexibility from series to series for the same homologue at constant rigidity. LC substances have proven their ability for LC devices to be operated at room temperature [7][8][9][10][11][12].…”