Design, synthesis and mesomorphic properties of chiral benzoates and fluorobenzoates with direct SmC_A*-Iso phase transition

Molecular Dynamics and Kinetics of Isothermal Cold Crystallization in the Chiral Smectogenic 3F7FPhH6 Glassformer

“…Chiral liquid crystalline substances with three aromatic rings in a molecular core and partially fluorinated alkoxy chain [1][2][3][4][5][6][7][8] are desired materials in liquid crystal display (LCD) technology as they often exhibit a smectic C * A (SmC * A ) phase, showing antiferroelectric properties in the surface-stabilized geometry [9]. Moreover, the tilt angle in these compounds often approaches 45 • , which leads to the optical uniaxiality and, consequently, far better quality of the dark state compared to the SmC * A phase with the smaller tilt angle [10,11].…”

“…A phase and kinetics of the isothermal cold crystallization on subsequent heating for (S)-4 -(1-methylheptylcarbonyl)biphenyl-4-yl 4-[7-(2,2,3,3,4,4,4-heptafluorobutoxy)heptyl-1-oxy]benzoate, denoted in short as 3F7HPhH6. This compound belongs to a family of 3FmX 1 PhX 2 r compounds [4][5][6], with a general formula presented in Figure 1a. Differences in the molecular structure within the 3FmX 1 PhX 2 r family exist in the length of the alkoxy chain (m = 0, 2-7) and chiral alkyl chain (r = 4-9), as well as the fluoro substitution of the benzene ring (X 1 , X 2 = {H, F}).…”

Vibrational Dynamics of a Chiral Smectic Liquid Crystal Undergoing Vitrification and Cold Crystallization

“…3F7HPhH7 was obtained in the Institute of Chemistry, Military University of Technology, Warsaw, Poland [29]. The purity of the sample was higher than 99.4% (using the ASTM E928 Standard Test Method for Determining Purity by Differential Scanning Calorimetry with the use of DSC TA 2500) and additionally confirmed by high performance liquid chromatography-photo diode array-mass spectrometry (HPLC-PDA-MS) analysis (APCI-ESI-dual source) Shimadzu Prominence HPLC-LCMS 2010EV equipped with a polychromatic UV-VIS detector and MS (ESI/APCI) analyzer using a Kinetex C18 and PFP column.…”

Design and Self-Assembling Behaviour of Calamitic Reactive Mesogens with Lateral Methyl and Methoxy Substituents and Vinyl Terminal Group

“…However, each part of the reactive mesogen molecule, namely the molecular core, type and position of the lateral substitution, linkage groups, length and type of the flexible chains, etc., can significantly change the resulting self-assembling behaviour of the designed material. The methyl [ 10 , 22 , 38 , 39 ] and methoxy [ 39 , 40 , 41 ] groups and halogen atoms [ 38 , 42 ], namely fluorine [ 42 , 43 , 44 , 45 , 46 , 47 ], chlorine [ 38 , 41 , 42 , 46 , 48 , 49 ], bromine [ 38 , 43 ] and iodine [ 50 ], are the most widely used and successful types of lateral substituents utilised for the effective tuning of the self-assembling behaviour, especially for the non-chiral and chiral calamitic LC materials. The type and position of the lateral substituents on the molecular core always drastically change the liquid crystalline behaviour of the resulting LC material when compared with its non-substituted analogue [ 38 , 39 ].…”