80361-70-2Relevant academic research and scientific papers
Synthesis and Liquid Crystalline Phases of Pyridazine Derivatives II
Liang, Jason C.,Cross, Julie O.
, p. 235 - 244 (2007/10/02)
Four more pyridazine compounds were synthesized.The compounds have a general structure R-X-Y-Z-R'; where Y is 3,6 disubstituted pyridazine ring, X and Z are either trans cyclohexyl or phenyl rings, R and R' are n-alkyl groups.The structure assignments were confirmed by carbon 13 NMR.Their liquid crystalline properties were evaluated.When both X and Z are cyclohexyl rings, the compounds have a single smectic b phase.However, if a phenyl ring is introduced into the system, the morphology becomes complicated.Keywords: synthesis, pyridazine, smectic, classification
KETONES-NEMATOGENS WITH MODERATE NEGATIVE DIELECTRIC ANISOTROPY AND HIGH CLEARING POINTS.
Osman,Huynh-Ba
, p. 141 - 152 (2007/10/02)
Anisotropic ketones whose rigid cores contain phenyl and cyclohexyl units were synthesized. The carbonyl group was incorporated either in the terminal substituents or in the link between the core units. The mesomorphic behavior of these ketones is described and correlated with their chemical structure. The 1-(4-alkanoylphenyl)-4-trans-alkylcyclohexanes as well as the 1-(4-alkanoylphenyl)-4-trans-alkanoylcyclohexanes show nematic phases. In contrast to laterally substituted compounds, these ketones have clearing points which are higher than those of the corresponding hydrocarbons. Another advantage of these nematogens is the ease of synthesis.
