892403-12-2Relevant academic research and scientific papers
A new class of discotic mesogens derived from tris(N-salicylideneaniline)s existing in C3h and Cs keto-enamine forms
Yelamaggad, Channabasaveshwar V.,Achalkumar, Ammathnadu S.,Rao, D. S. Shankar,Prasad, S. Krishna
, p. 8308 - 8318 (2008/03/12)
(Chemical Equation Presented) Two series of a unique class of columnar liquid crystals derived from tris(N-salicylideneaniline)s [TSANs] in which the proton and the electron interact with each other through the H-bonding environment are reported. The synt
Discotic liquid crystalline hydrazone compounds: Synthesis and mesomorphic properties
Jeong, Min Ju,Park, Jun Ha,Lee, Changjin,Chang, Ji Young
, p. 2221 - 2224 (2007/10/03)
1,3,5-Trisacetoacetamidobenzene with three 1,3-diketo groups was synthesized by the reaction of 1,3,5-triaminobenzene with diketene. Discotic hydrazone compounds were prepared by the diazo coupling reaction between 1,3,5-trisacetoacetamidobenzene and diazonium salts of 4-alkyloxyphenylamines. The compounds existed in hydrazone forms exclusively, being stabilized by the intramolecular hydrogen bonds, and showed discotic nematic or columnar hexagonal mesophases.
Effects of isocyanide substituents on the mesogenic properties of halogeno(isocyanide)gold complexes: Calamitic and discotic liquid crystals
Coco, Silverio,Espinet, Pablo,Marti-Alvarez, Jose M.,Levelut, Anne-Marie
, p. 19 - 23 (2007/10/03)
The liquid crystal behaviour of linear [AuX(CNC6H4OCnH2n+1)] (X = halogen) complexes is tuned by systematically changing the structure of the isocyanide ligand. The changes studied are lateral fluorination at the 2- and 3-positions of the phenyl ring and modification of the rod-like structure of the complexes by addition of two alkoxy chains at the meta positions. None of the free isocyanides used here are liquid crystals, but all the gold complexes prepared display mesomorphic properties, except iodo(2-fluoro-4-butoxyphenyl isocyanide)gold(I). The (2- and (3-fluorophenyl isocyanide)gold(I) complexes show smectic A mesophases, except the 2-fluoro derivative with n = 6, which shows a nematic phase, while the (3,4,5-trialkoxyphenyl isocyanide)gold compounds display columnar hexagonal phases at room temperature.
