95906-31-3Relevant academic research and scientific papers
Liquid crystals
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, (2008/06/13)
Compounds of the formula STR1 wherein R1 is hydrogen or straight-chain alkyl; R2 is --CN, --R, --COR, --COOR or when R2 is positioned on an aromatic ring R2 also can be --OR, --OOCR or --F; R is alkyl; A is a group with 1 to 4 six-membered rings, these rings being linked directly with one another and with ring B in each case via a single covalent bond or being linked at one or two positions also via --COO--, --OOC-- or --CH2 CH2 --; the six-membered rings in A and ring B each are 1,4-phenylene or trans-1,4-cyclohexylene or one of these rings also is trans-2,5-disubstituted m-dioxane, 2,5-disubstituted pyrimidine or 3,6-disubstituted pyridazine, with the proviso that a maximum of two adjacent trans-1,4-cyclohexylene rings are linked directly via a single covalent bond; and m is the integer 2, or when ring B is trans-1,4-cyclohexylene or trans-2,5-disubstituted m-dioxane, m also can be the integer 0, their manufacture, liquid crystalline mixtures which contain these compounds as well as the use of these compounds for electro-optical purposes are described. Additionally, compounds of the formula STR2 wherein R8 is straight-chain C1 -C12 alkyl, their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes are described.
New Liquid Crystals: The Synthesis and Mesomorphic Properties of Alkenylsubstituted Cyanophenylethylcyclohexanes and Cyanobiphenylylcyclohexanes
Petrzilka, Martin,Germann, Alfred
, p. 327 - 342 (2007/10/02)
Nineteen alkenylsubstituted cyanophenylethylcyclohexanes and cyanobiphenylylcyclohexanes have been synthesized by systematically varying both the position and the configuration of the isolated C,C-double bond.The influences of such structural changes on the mesomorphic properties are discussed and the observed nematic thermal stabilities (cf.Table I) are compared, where possible, with those of the corresponding saturated alkyl analogs.
