Mesomorphic, morphologic and thermotropic properties of 4-hexyl-N-(4-hexadecyloxysalicylidene)aniline

Synthesis, mesomorphic and physical properties of two new analogs of Schiff’s base with an alkenic terminal chains

“…The crude product was purified by recrystallization from acetone/methanol. The chemical structure of the compounds 1a and 1b is similar, as it is presented in [6,[14][15][16][17][18]. The structure of the compounds 1a and 1b were confirmed by various spectroscopic methods.…”

“…Such behaviour of the optical transmission indicates that the thermic hysteresis take place also for the thermo-optical properties of the compounds 1a and 1b. In conclusion we would like to note that the thermic hysteresis for the first order phase transitions have been experimentally observed by various scientists for number physical parameters of liquid crystals in [18,[60][61][62][63][64][65][66][67][68].…”

Peculiarities of biphasic regions at phase transitions in oriented textures of 4-cyano-4′-n-pentylbiphenyl

“…Besides, as it is noted above, the nematic-isotropic liquid and isotropic liquid-nematic phase transitions in 5CB characterize by the biphasic region ( T NI = 0.69 K for the direct and T I N = 0.67 K for the reverse phase transitions). An available of the thermal hysteresis for the phase transitions and existence of the biphasic regions have been theoretically predicted in [17,[20][21][22][23][24] and have been experimentally observed by various scientists for number of liquid crystals in [25][26][27][28][29][30]. An availability of the thermal hysteresis and existence of the biphasic region are characteristic for the first order phase transition between liquid crystalline mesophase and isotropic liquid.…”

Thermotropic and Thermo-optical Properties of Nematic Mesophase at Direct and Reverse Phase Transitions

“…This hysteresis is connected with the overheating and overcooling of liquid crystals. It was theoretically predicted in [15][16][17][18][19][24][25][26], is typical for firstorder phase transitions between the liquid crystalline mesophase and the isotropic liquid, and was experimentally observed by various scientists for different liquid crystals [12,[27][28][29][30][31][32].…”