Mesogenic 4-(ω-Hydroxyalkoxy)-4'-formylazobenzenes

Mesomorphic and dielectric properties of the systems based on nematic cyanobiphenyls

“…The LC-3 mesogen was prepared via alkylation of 4'-hydroxybiphenyl-4-carbonitrile (Aldrich) with 6-chlorohexan-1-ol in DMF in the presence of K 2 CO 3 and was purified by recrystallization from ethanol and 12 h maintaining at the residual pressure of 200 Pa at the temperature of the mesophase existence. The purity of the liquidcrystalline solvents was judged from the constant temperature of nematic-isotropic transition (T NI ) in the repeated purification cycles, the absence of layering into the nematic and the isotropic phases upon the phase transition, and the correspondence of the melting points to the reference values [28].…”

Innovative triazine-core octupolar chromophores: unlocking new Frontiers in nonlinear optics

“…Then, the alkylamino-substituted benzene derivatives 1a-c were reacted with aminobenzaldehyde 2, obtained by reduction of the nitrobenzaldehyde to yield the Azo derivatives 3a-c via an azo coupling reaction by modifying procedure described in the literature. 50 The final step of synthesis to obtain the targeted compounds of this new series was based on a synthetic route already reported in the literature and used for similar compounds via Knoevenagel 51,52 condensation reaction. Following the same procedure, compounds 4a-c were synthesised by reacting 2,4,6-trimethyl-1,3,5-triazine with the corresponding aldehyde 3a-c in the presence of tBuOK in THF.…”

Sorption and Isomerselective Properties of Binary Sorbent Based on Supramolecular 4-(3-Hydroxypropyloxy)-4'-Formylazobenzene Liquid Crystal and Partially Methylated β-Cyclodextrin

“…Для приготовления композиционного сорбента использовали супрамолекулярный смектиконематический жидкий кристалл 4-(3-гидроксипропилокси)-4'-формилазобензол (ГПОФАБ), синтезированный доктором химических наук С. А. Кувшиновой (Ивановский государственный химико-технологический университет) и очищенный по методике, приведенной в [6], и гептакис(2,6-ди-О-метил)-β-циклодекстрин (Ме2,6-β-ЦД) (Sigma Aldrich) в соотношении 90:10 масс. %.…”