Liquid crystals based on semiperfluorinated imines and salicylaldimato metal complexes. A comparative study of alkyl, alkoxy and polyether substituents

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.…”

“…The salicylaldimine compounds 1a and 1b were prepared as previously described [14,15] by the p-toluensulfonic acid catalysed condensation of 2-Hydroxy-4-(10-undecenyloxy)benzaldehyde [16] with corresponding aniline in toluene. 2-Hydroxy-4-(10-undecenyloxy)benzaldehyde (5 mmol), 6 mmol of 4-hexylaniline and 4-hexyloxyaniline, respectively, and p-toluensulfonic acid (80 mg) were dissolved in 50 ml toluene.…”

Thermotropic, Thermo-morphologic, and Thermo-optical Properties of New Smectogenic Calamitic Compounds Containing Imine Linking Groups

“…The existence of disclinations, taking place in these textures, is a characteristic peculiarity of the SmC mesophase [12,[17][18][19]. Such a type of texture is well known and was also observed in [20][21][22][23] for the SmC mesophase in salicylaldimines of various homological series.…”

“…The SA1 and SA2 compounds were prepared as described in [7][8][9] by the p-toluensulfonic acid (40 mg) catalyzed condensation of 4-dodecyloxy-2-hydroxybenzaldehyde and 4-tetradecyloxy-2-hydroxybenzaldehyde, respectively (2.5 mmol), with 4-dodecylaniline (3 mmol) in toluene (25 mL). The SA1 and SA2 compounds were purified by several recrystallizations from acetone/methanol.…”

Thermoluminescence measurements of liquid crystal azomethines and poly(azomethines) with different shapes as thermo-detectors

“…Obtained azomethines and poly(azomethines), depending on the chemical structure, emitted mainly blue or green light [1][2][3][4][5][6][7][8][9]. In addition, small compounds and polymers with imine bond are investigated as liquid crystal materials with bent (banana) [10][11][12][13][14] or rod [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] shape. Depending on the chemical structure the investigated compounds exhibited one mesophase or rich polymorphism 34,35].…”