Effect of high pressure on relaxation dynamics and crystallization kinetics of chiral liquid crystal in its smectic phase

Abstract

The impact of high pressure on relaxation dynamics and the crystallization process in the smectic phase with antiferroelectric properties ( phase) of novel liquid crystal was studied.

On relaxation and vibrational dynamics in the thermodynamic states of a chiral smectogenic glass-former

“…This compound belongs to a family of 3F mX 1 Ph X 2 r compounds (where ‘3F’ is the C 3 F 7 – group, ‘ m ’ is the number of methylene groups in the non-chiral terminal chain, m = 2–7, ‘ X 1 ’ and ‘ X 2 ’ are hydrogen H or fluorine F atoms in the phenyl ring, and ‘ r ’ is the length of alkyl chain connected with the asymmetric carbon atom, r = 4–9), which have been extensively investigated. 2–8 The characteristic features of these compounds are the presence of the phase at the broad temperature range and the value of the tilt angle of approx. 45°, which leads to the optical uniaxiality, and consequently, much better quality of the dark state compared to the phase with the smaller tilt angle.…”

Insight into cold- and melt crystallization phenomena of a smectogenic liquid crystal

“…Additionally, the obtained results will be compared with those already reported for other compounds of the 3F m X 1 PhX 2 r family, e.g. for the 3F7HPhH7 compound (with a longer non-chiral alkyl chain), 21,31–33 for the 3F5HPhH6 compound (with a shorter chiral alkyl chain), 34 and for the 3F5HPhF4 compound (abbreviated as 3F5BFBiHex, with a fluoro-substituted phenyl ring) 24,35 in order to discuss the influence of molecular structure on crystallization kinetics.…”

Investigation of Chiral Smectic Phases and Conformationally Disordered Crystal Phases of the Liquid Crystalline 3F5FPhH6 Compound Partially Fluorinated at the Terminal Chain and Rigid Core

“…The experimental points near the kink are not situated exactly between the calculated lines, as was obtained for similar compounds. 13 , 60 However, the deviations for 3F5FPhH6 are not significant, as they are of ca. 0.1 on the Y axis for the P L -process and of ca.…”