93205-71-1Relevant academic research and scientific papers
Liquid crystalline compound
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, (2008/06/13)
A liquid crystal compound having a relatively low viscosity, a superior compatibility with other liquid crystalline compounds and suitable for preparing a liquid crystal device having a high response rate, and a superior liquid crystal composition contain
Liquid crystals
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, (2008/06/13)
Compounds of the formula STR1 wherein n stands for the number 0 or 1; the rings A1, A2 and A3 represent 1,4-phenylene, 2-fluoro-1,4-phenylene or trans-1,4-cyclohexylene or one of these rings also represents a 2,5-disubstituted pyrimidine ring or a trans-2,5-disubstituted m-dioxane ring; X1 represents a single covalent bond, --COO--, --OOC--, --CH2 CH2 --, p--C6 H4 --, --CH2 CH2 --p-- C6 H4 --, --CH2 CH2 --p--C6 H4 --CH2 CH2 -- or, insofar as the rings A1 and A2 represent 1,4-phenylene, also --NON--; R2 represents 1E-alkenyl, 2Z-alkenyl, 3E-alkenyl, 4-alkenyl or alkenyloxy, with the proviso that the oxygen atom in alkenyloxy is linked with a saturated carbon atom; and R1 signifies 1E-alkenyl, 2Z-alkenyl, 3E-alkenyl, 4-alkenyl or, insofar as R2 represents alkenyloxy, also alkyl, their manufacture, as well as liquid crystalline mixtures and the use for electro-optical purposes.
Liquid crystalline compounds and mixtures
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, (2008/06/13)
This invention concerns compounds of the formula: STR1 wherein X is a single covalent bond, --CH2 CH2 --, 1,4-phenylene, a 2,5-disubstituted pyrimidine ring or a group of the formula: STR2 ring A is trans-1,4-cyclohexylene or, when X is a single covalent bond, ring A may also be 1,4-phenylene, a 2,5-disubstituted pyrimidine ring or a trans-2,5-disubstituted m-dioxane ring; and R1 is straight-chain trans-1-alkenyl having 2 to 12 carbon atoms or straight-chain trans-3-alkenyl having 4 to 12 carbon atoms or, when X is --CH2 CH2 --, R1 may also be 1,4-phenylene, a 2,5-disubstituted pyrimidine ring or a group of formula IA or when ring A is a 2,5-disubstituted pyrimidine ring or a trans-2, 5-disubstituted m-dioxane ring, R1 may also be straight-chain alkyl with 1 to 12 carbon atoms; and one of the benzene rings may have a lateral fluorine substituent; their manufacture, and liquid crystalline mixtures and electro-optical devices containing same.
A difluoroalkylcyclohexyl-benzonitrile derivative
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, (2008/06/13)
A liquid crystalline compound having a small Δn value; suitable for preparing a liquid crystal display element having a broad viewing angle; having a large positive Δε value; and suitable for preparing a liquid crystal composition having a low driving vol
Liquid crystal compound
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, (2008/06/13)
A liquid crystalline compound useful as a component of liquid crystal compositions for TN mode display elements and having a large positive Δε value and also a low viscosity for the Δε value and a liquid crystal composition containing the compound are pro
Liquid crystalline compounds and mixtures
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, (2008/06/13)
This invention concerns compounds of the formula: STR1 wherein n is 1 and X is --COO--, --OOC-- or --CH2 CH2 --; or n is O and X is --CH2 CH2 --; ring A is p-phenylene or trans-1,4-cyclohexylene; R2 i
Novel liquid crystal mixtures
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, (2008/06/13)
Liquid crystalline mixtures containing compounds of the formula STR1 wherein n stands for the number 0 or 1; X1 and X2 denote single covalent bonds or one of the symbols X1 and X2 also denotes --COO--, --OOC-- or --CH2 CH2 --; the rings A1, A2 and A3 represent 1,4-phenylene, 2-fluoro-1,4-phenylene or trans-1,4-cyclohexylene or one of these rings also represents a 2,5-disubstituted pyrimidine ring or a trans-2,5-disubstituted m-dioxane ring; R1 signifies 4-alkenyl or on a cyclohexyl ring also 2Z-alkenyl; and R2 denotes alkyl, alkoxy, --CN or --NCS, as well as the manufacture of these compounds and the use for electro-optical purposes are described.
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 Nematic Alkenylsubstituted Cyanophenylcyclohexanes
Petrzilka, Martin
, p. 109 - 124 (2007/10/02)
18 Alkenylsubstituted cyanophenylcyclohexanes 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
