WO1998032721A1 - Composes et composition a cristaux liquides et element graphique a cristaux liquides contenant lesdits composes - Google Patents
Composes et composition a cristaux liquides et element graphique a cristaux liquides contenant lesdits composes Download PDFInfo
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- WO1998032721A1 WO1998032721A1 PCT/JP1998/000222 JP9800222W WO9832721A1 WO 1998032721 A1 WO1998032721 A1 WO 1998032721A1 JP 9800222 W JP9800222 W JP 9800222W WO 9832721 A1 WO9832721 A1 WO 9832721A1
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- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
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- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/3444—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing one nitrogen atom, e.g. pyridine
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- C09K19/0403—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems
- C09K2019/0407—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems containing a carbocyclic ring, e.g. dicyano-benzene, chlorofluoro-benzene or cyclohexanone
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- C09K2019/0414—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems containing a heterocyclic ring
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
Definitions
- the present invention relates to a liquid crystal compound effective as a component of a liquid crystal composition, a liquid crystal composition containing the same, and a liquid crystal composition formed by using the liquid crystal composition.
- a liquid crystal display device utilizes the optical anisotropy and dielectric anisotropy of a liquid crystal material.
- TN type twisted nematic type
- DS type dynamic scattering type
- guest-host type guest-host type
- DAP type oriented phase change type
- STN type super twisted nematic type
- TFT type thin film transistor type
- one of the requirements for liquid crystal displays is to reduce power consumption. This requirement can be met by lowering the threshold voltage (Vth) of the liquid crystal material.
- Vth threshold voltage
- a currently effective means for lowering V th is to develop a compound that is larger than the currently mainstream liquid crystalline compound.
- fluorine-based liquid crystal compounds most frequently used in TFT-type liquid crystal displays currently have fluorine atoms introduced at the 3- and 4-positions of the benzene ring.
- Difluorobenzene derivative for example, the compound (10) disclosed in Japanese Patent Publication No. 02-40048. The ⁇ ⁇ of this compound is about 5.
- ⁇ -type and STN-type liquid crystal displays mainly use cyano compounds.
- An example is the following compound (11).
- the ⁇ £ of this compound is about 9.
- Japanese Patent Application Laid-Open No. 1-233239 discloses compounds (12) and (13) in which a chlorine atom or a fluorine atom is bonded to a cyclohexane ring.
- liquid crystal displays are required to be able to be driven at low temperatures.
- a cyclohexane ring is often used as a compound in a composition having a low ⁇ , and since such a composition has poor compatibility at a low temperature, a smectic phase or a crystal is easily precipitated.
- An object of the present invention is to provide a liquid crystal compound having a small ⁇ and a large ⁇ , or a liquid crystal compound having a small ⁇ and a high clearing point, or a small ⁇ and a low ⁇ , which are necessary to solve the above-mentioned problems of the prior art.
- the oxygen atom and the sulfur atom are not adjacent to each other, and n1, n2, n3, n4, m1, m2 and m3 are each independently 0 or 1,
- Rings Al, A2, A3 and A4 are each independently a benzene ring, in which 1 to 4 hydrogen atoms may be substituted with a halogen atom, bicyclo [1.1.1] pentane Ring, bicyclo [2.1.1] hexane ring, bicyclo [2.2.1] heptane ring, bicyclo [2.2.2.2] octane ring, naphthalene ring, 1,2,3,4-tetrahydronaf Evening ring, perhydronaphthalene ring, fluorene ring, phenanthrene ring, 9,10-dihydrophenanthrene ring, indane ring, indene ring, pyridine ring, pyrimidine ring, cycloalkane ring with 4 to 20 carbon atoms Or a cycloargen ring, wherein —CH 2 — in the ring may be replaced by an oxygen atom or a sulfur atom, and G is any of
- G is a group of the formula (G 1)
- Y and Y 2 are not simultaneously hydrogen atoms
- Q 4 are both oxygen atoms
- both Q 2 and Q 3 are CH 2 2 — and Y 2 is a hydrogen atom
- n 4 is 1
- Q 2 and Q 3 are each independently an oxygen atom or a sulfur atom, and Y 1 and Y 2 are a hydrogen atom and a saturated alkyl group, a hydrogen atom and a trifluoromethyl group, a trifluoromethyl group and a trifluoromethyl It is not a combination of methyl groups, and Ch to Q 4 are not all CH 2 —
- G is a group of the formula (G 2)
- a liquid crystalline compound according to Q 2 Oyopi (3 3 are independently each an oxygen atom or a sulfur atom (2).
- a liquid crystal composition comprising at least one liquid crystal compound according to any one of (1) to (11).
- Ri represents an alkyl group having 1 to 1 0 carbon atoms
- X is F, C and -! OCF3, one OCF 2 H, one CF 3, -CF 2 H or - indicates CFH 2
- L] , L 2 , L 3 and L 4 independently represent H or F, and Z 2 independently of each other—
- a liquid crystal composition characterized by containing at least one compound selected from the group of compounds represented by (1).
- R 2 is a group in which any non-adjacent methylene group in the group is replaced by an oxygen atom.
- 2 represents an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, or F, wherein ring A is a trans-1,4-cyclohexylene group, 1,4-phenylene A benzene group or 1,3-dioxane-1,2,5-diyl group; ring B is trans-1,4-cyclohexylene group, 1,4-phenylene group, or pyrimidine-1,2,5-diyl represents a group, ring C trans - the tooth 4-cyclopropyl indicates xylene group or 1, 4 one-phenylene group, Z 3 an (CH 2) 2 -, shows an COO- or a single bond, L 6 And L 6 independently represent H or F, and b and c independently represent 0 or 1. )
- R 3 represents an alkyl group having 1 to 10 carbon atoms, L represents H or F, and d represents 0 or 1.
- R 4 represents an alkyl group having 1 to 10 carbon atoms, and ring D and ring E independently represent trans to form a 4-cyclohexylene group or a 1,4-phenylene group.
- Z 4 and Z 5 independently represent —CO ⁇ — or a single bond;
- Z 6 represents —C 00— or 1 C ⁇ C—;
- X 2 represents F, one OCF 3 , CF 2 H, one CF 3 , one CF 2 H or one CFH 2 ;
- L 8 and L 9 independently represent H or F; e, f and g independently 0 or 1 Is shown.
- R 5 and R 6 independently of one another may be a group in which any non-adjacent methylene group in the group is replaced by an oxygen atom, an alkyl group having 1 to 10 carbon atoms or a carbon atom having 2 carbon atoms.
- a ring G represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group, or a pyrimidine-2,5-diyl group;
- a ring H represents a trans-1,4-cyclohexylene group;
- Z 8 represents one CO 0— or a single bond.
- R 7 and R 8 are each independently an alkyl group having 1 to 10 carbon atoms or an alkyl group having 2 to 1 carbon atoms in which any non-adjacent methylene group in the group may be substituted by an oxygen atom.
- Ring I represents a trans-4-cyclohexylene group, 1,4-phenylene group, or pyrimidine-2,5-diyl group;
- ring J represents a trans-1,4-cycloalkyl group;
- a xylene group, one or more hydrogen atoms on the ring may be substituted by F, or a 4-phenylene group or a pyrimidine-1,5-diyl group, and a ring K is a trans-1,1,
- Z 9 and ZH independently represent —COO—, — (CH 2 ) 2 — or a single bond; and
- a liquid crystal composition comprising at least one compound to be used.
- liquid crystal compound according to any of (1) to (11) is contained, and as a part of the second component, the general formulas (2), (3) and And at least one compound selected from the group consisting of (4), and as another part of the second component, one of the general formulas (5), (6), (7), (8) and (9)
- a liquid crystal composition comprising at least one compound selected from the group consisting of:
- the liquid crystal compound represented by the general formula (1) of the present invention has a ring other than the Beksen ring at the molecular terminal, most of which is a hetero ring, which has a halogen atom, a cyano group, a nitro group, an amino group, and a carbon atom. It is characterized by having a partial skeleton in which the halogenated alkyl groups of the numbers 1 to 20 are substituted.
- the compound (1) of the present invention has a low ⁇ and has a large ⁇ or a high clearing point, and a compound having a medium ⁇ has a large ⁇ . Things.
- the terminal substituent of is an alkyl group in which one CH 2- in the group may be substituted with one CH2 CH-
- a compound having a small ⁇ has a high clearing point or has good compatibility.
- it has a large ⁇ . Therefore, when these compounds of the present invention are used as components of a liquid crystal composition, a new liquid crystal composition having preferable characteristics can be provided.
- liquid crystal compounds represented by the general formula (1) of the present invention have excellent characteristics.
- the structure and characteristics will be described more specifically.
- the following compounds (R-1) or (R-2) having the following definitions have more preferable properties.
- This compound group has a high clearing point and low viscosity, and has a large ⁇ when at least one of Yi and Y 2 is an electron withdrawing group such as a fluorine atom or a cyano group.
- R is a cyano group, a halogen atom, a trifluoromethyl group, a trifluoromethoxy group, or a halogenated alkyl group having 1 to 7 carbon atoms in which one or more methylene groups in the group may be replaced by an oxygen atom.
- the number of rings is defined by m 1 to m 3, each of which is independently 0 or 1, but the group of compounds of (m ⁇ 1) to (m ⁇ 3) It has more favorable properties.
- This group of compounds has excellent properties of very low viscosity and very good compatibility.
- This group of compounds has excellent properties such as high clearing point, low viscosity and good compatibility.
- This group of compounds has the property of having an extremely high clearing point and greatly increasing the upper limit of the clearing point of a composition containing the compound when used in a small amount.
- the number of linking groups is defined by n 1 to n 4, each of which is independently 0 or 1, but the compound group of (n-1) or (n-2) Has more preferable characteristics.
- This group of compounds has a high clearing point and low viscosity.
- This group of compounds has a high clearing point and good compatibility.
- an alkylene group having 1 to 4 carbon atoms is shown, each of the following compound groups (B-1) to (B-4) has more preferable characteristics.
- nl to n 4 are 1, and at least one of B! B * is an alkylene group having 2 or 4 carbon atoms in which one —CH 2 — may be replaced by an oxygen atom.
- B * is an alkylene group having 2 or 4 carbon atoms in which one —CH 2 — may be replaced by an oxygen atom.
- Compound. This compound group has a high clearing point and good compatibility, and is more stable to heat and light than the compound group (B-2).
- This group of compounds is inferior in stability to the group of (B-1) compounds, but has a higher clearing point and notably a broader nematic range.
- a compound of the general formula (1), wherein the corresponding n 1 to n 4 are 1 and at least one of B and B 4 is —CF CF 1.
- This group of compounds is inferior in stability to the group of (B-1) compounds, but has a very low viscosity and a wide liquid crystal temperature range.
- n 1 ⁇ ! A compound of the general formula (1), wherein 14 is 1 and at least one of B and B 4 is —C ⁇ or —CF 20 —.
- This group of compounds has a large ⁇ .
- rings A 1, A 2, A 3, and A 4 each independently represent a benzene ring, a pyridine ring, A pyrimidine ring, and in addition, a carbon atom in the ring may be replaced with an oxygen atom or a sulfur atom, a bicyclo [1.1.1] pentane ring, a bicyclo [2.1.1] hexane ring, a bicyclo [2 [2.2.1] heptane ring, bicyclo [2.2.2] octane ring, naphthalene ring, 1,2,3,4-tetrahydronaphthalene ring, perhydronaphthalene ring, fluorene ring, phenanthrene ring, 9,10 —Dihydrophenanthrene ring, indane ring, indene ring, or cycloalkane ring or cycloargen ring having up to 4 to 20 carbon atoms, but the following compounds (A-1) to (
- Rings A1, A2, A3, and A4 each independently represent a benzene ring, a cyclohexane ring, or a cyclohexene ring in which 1 to 4 hydrogen atoms may be replaced by fluorine atoms.
- This group of compounds has low viscosity and is stable to heat and light.
- a compound of the general formula (1) wherein ring A4 or the corresponding m1 to m3 is 1, and at least one of rings A1, A2 and A3 is a pyridine ring or a pyrimidine ring.
- the compounds have a large [Delta] [epsilon], because the further elastic constant becomes small, the c general formula having the characteristic that the threshold voltage is low in the liquid crystal composition ⁇ cell containing the compounds (1), the ring
- the following (A-3) to (A-15) have particularly preferable characteristics.
- B represents a benzene ring in which 1 to 4 hydrogen atoms may be substituted by a fluorine atom
- H represents a cyclohexane ring
- C represents a cyclohexene ring having a double bond on the R side.
- a cyclohexene ring having a double bond on the h or G side is represented by ch.
- This group of compounds has a small viscosity and very low viscosity.
- This compound group has very low viscosity and very good compatibility.
- This group of compounds has a small ⁇ n and extremely low viscosity.
- This compound group has a high clearing point and good compatibility.
- This group of compounds has good compatibility and small ⁇ .
- This group of compounds has a high clearing point and good compatibility.
- a liquid crystal compound having desired characteristics By selecting from the above compound groups and further selecting G in the compound, a liquid crystal compound having desired characteristics can be obtained. Among these, compounds having specific groups of two or more of the above compound groups are particularly preferable.
- the partial skeleton G that induces such excellent characteristics will be described in more detail.
- R is the above-mentioned alkyl group or halogenated alkyl group (excluding those in which the carbon bonded to the core among the carbons in R is replaced by a halogen atom)
- the following structure is used. Excellent in clearing point height and viscosity.
- the structure with particularly large ⁇ is one in which Q 2 and Q 3 are oxygen atoms or sulfur atoms, respectively.
- the structure with a particularly large ⁇ £ is a structure in which Q 2 and Q 3 are an oxygen atom or a sulfur atom, respectively.
- the structure with a particularly large ⁇ £ is a structure in which Q 2 is an oxygen atom or a sulfur atom.
- halogenated alkyl group halogen atom or cyano group in which a carbon atom bonded to the core (ring A 1) is substituted with a halogen atom, (G 1 :) to (G 3) are
- the following structure also has excellent properties such as ⁇ , clear point height and viscosity.
- the structures with particularly large ⁇ are those in which Q is a six-membered ring, and Q and Q 2 are a oxygen atom or a sulfur atom, respectively, in a five-membered ring.
- R is the above-mentioned alkyl group or halogenated alkyl group (excluding those in which the carbon bonded to the core among the carbons in R is substituted by a halogen atom),
- a compound in which (1) and ⁇ 2 are each independently a halogen atom is an excellent compound having a large ⁇ ⁇ .
- a compound in which ⁇ , and ⁇ 2 are each independently a fluorine atom or a chlorine atom, and is a fluorine atom or a chlorine atom, Y 2 is the Ah shall hydrogen atom is more preferable combination in that a low viscosity.
- Upsilon but what is a is Upsilon 2 is a hydrogen atom Shiano group, [Delta] [epsilon] is a very large high clearing point compounds, have very good properties is more low viscosity, Upsilon, but alkenyl group, those Upsilon 2 is a hydrogen atom, a very broad nematic phase temperature range.
- (3) is a compound in which the above-mentioned halogenated alkyl group and Y 2 are a hydrogen atom are compounds having a very large ⁇ ⁇ and a high clearing point.
- Y 2 is a hydrogen atom
- Y 2 is a hydrogen atom
- R is a halogenated alkyl group, a halogen atom or a cyano group as described above, wherein a carbon atom bonded to the core among carbon atoms in the group is substituted with a halogen atom,
- the compound represented by the general formula (1) of the present invention can be produced by known methods or by appropriately combining and utilizing them.
- One example is shown below.
- R a represents a site of the formula.
- Ha 1 in the figure represents bromine or iodine.
- (1-1-1-1) A method for synthesizing a compound in which Q 2 and Q 3 are each independently an oxygen atom or a sulfur atom.
- LDA lithium diisopropylamide
- THF tetrahydrofuran
- the compound (8), (9) or (10) can be synthesized by reacting (tri) phosphogen and pyridine in a solvent which does not participate in the reaction such as benzene or toluene.
- compound (3), (6) or (7) By reacting compound (3), (6) or (7) with thiophosgene and pyridine in a solvent that does not participate in the reaction such as benzene or toluene, the compound (11), (12) or (13) is reacted, respectively.
- Compound (21) can be synthesized by reacting compound (20) with p-toluenesulfonic acid or a cation exchange resin in a solvent not involved in the reaction such as toluene.
- a compound in which Y 1 and Y 2 are each independently an ⁇ -halogen atom, a cyano group, or a hydrogen atom can be preferably synthesized by the following method.
- the lactone derivative (23) can be obtained by conducting a Bayer-Pigliger reaction on the compound (22) with a peroxide such as metaclo-peroxybenzoic acid (hereinafter abbreviated as MCPBA).
- the compound (23) is converted into the compound (24) by reacting a dioxin reagent or dimer of ⁇ -methoxyphenylthionophosphine sulfide in a solvent that does not participate in the reaction such as toluene.
- a dioxin reagent or dimer of ⁇ -methoxyphenylthionophosphine sulfide in a solvent that does not participate in the reaction such as toluene.
- the compound (24) can also be reacted with sodium hydrosulfide after acting with the wine reagent.
- compound (25) can be synthesized by acting carbene (16) on lactone derivative (23).
- Compound by acting in the ⁇ case 2 are both fluorine atoms of the compound (2 4) to (hereinafter abbreviated as DAST) Jefferies chill amino trifluoride Li de a not participating in the reaction such as methylene chloride Ya dimethyl Tokishietan solvent Compound (25) can be synthesized.
- Compound (25) (where Y, is a halogen atom other than a fluorine atom and Y 2 is a hydrogen atom) forms a base such as potassium mono-t-butoxide / hydroxide.
- the compound (29) can be synthesized by synthesizing compound (28) and hydrogenating it using a Wilkinson catalyst or PdZC catalyst. Is a cyano group and Y 2 is a hydrogen atom.
- the compound (30) is synthesized using the synthesis method of the compound (29), and the compound is reacted with a cyanation reagent such as sodium cyanide to obtain the compound. (31) can be synthesized.
- Compound (35) can be synthesized by reacting compound (34) with p-toluenesulfonic acid or a cation exchange resin in a solvent that does not participate in the reaction such as toluene.
- compounds in which and Y 2 are each independently a halogen atom, a cyano group or a hydrogen atom are compounds (25), (27), and (27) except that compound (23) is replaced by compound (36). It is preferable to synthesize the target compound in the same manner as in the method for synthesizing 29).
- Compound (38) can be synthesized by acting Amberlyst on compound (37) in a solvent that does not participate in the reaction such as toluene.
- compounds in which Y and Y 2 are each independently a halogen atom, a cyano group or a hydrogen atom are compounds (25), (27) except that compound (23) is replaced by compound (39). It is preferable to synthesize the target compound in the same manner as in the synthesis of (29).
- the compound represented by the general formula (18) can be synthesized by acting a base such as lithium-t-butoxide or a hydroxide hydroxide on the compound that is an atom.
- a compound in which Y, is a cyano group can be synthesized by reacting (28) with a cyanating reagent such as sodium cyanide.
- the liquid crystal composition according to the present invention comprises at least one compound of the general formula (1) in the range of 0.1 to 9 9. TJP98 / 00222
- the liquid crystal composition provided by the present invention comprises, in addition to the first component containing at least one compound (1), other compound groups represented by the general formula (1) or It is completed by mixing compounds arbitrarily selected from the general formulas (2) to (9).
- the liquid crystal composition provided by the present invention may include only the first component containing at least one kind of the liquid crystal compound represented by the general formula (1), and in addition to this, as the second component, the above-mentioned general formula (2) ), (3) and at least one compound selected from the group consisting of (4) (hereinafter, referred to as the second component A) and Z or the general formula (5), (6), (7), (8) And a mixture of at least one compound selected from the group consisting of (9) (hereinafter, referred to as a second component B).
- a threshold voltage, a liquid crystal phase temperature range, a refractive index anisotropy value, A known compound can be mixed as a third component for the purpose of adjusting the dielectric anisotropy value, viscosity, and the like.
- Preferred examples of the compounds contained in the general formulas (2), (3) and (4) among the above-mentioned second A component include (2-1) to (2-1-5) and (3-1), respectively. ⁇ (3-48) and (4-1) ⁇ (4-155).
- the compounds represented by these general formulas (2) to (4) have a positive dielectric anisotropy value and are very excellent in thermal stability and chemical stability.
- the amount of the compound used is preferably in the range of 1 to 99% by weight based on the total weight of the liquid crystal composition, preferably 10 to 97% by weight, more preferably 40 to 95% by weight.
- R 2 , R 3 and R 4 have the same meaning as described above.
- the compounds represented by the general formulas (5) to (7) have a positive dielectric anisotropy value and a large dielectric anisotropy value, and are used for the purpose of reducing the threshold voltage particularly in the composition components. You. It is also used for the purpose of adjusting the viscosity, adjusting the refractive index anisotropy value, expanding the liquid crystal phase temperature range, and further improving the steepness.
- preferred examples of the compounds contained in the general formulas (8) and (9) are (8-1) to (8-8) and (9-1) to (9-13), respectively. ).
- R 5 and R 6 have the same meaning as described above.
- the compounds of the general formulas (8) and (9) are compounds having a negative or slightly positive dielectric anisotropy value.
- the compound of the general formula (8) is mainly used for the purpose of decreasing viscosity and adjusting Z or refractive index anisotropy value.
- the compound of the general formula (9) is used for the purpose of extending the nematic range such as increasing the clearing point, and for adjusting the refractive index or the anisotropy value.
- the compounds of the general formulas (5) to (9) are indispensable compounds particularly for preparing liquid crystal compositions for STN display mode and ordinary TN display mode.
- the amount of the compounds represented by the general formulas (5) to (9) can be arbitrarily used in the range of 1 to 99% by weight when preparing a liquid crystal composition for a normal TN display mode and an STN display mode. , 10 to 97% by weight, more preferably 40 to 95% by weight. C In that case, the compounds of (2) to (4) may be partially used.
- a helical structure of the liquid crystal composition is induced to prepare a necessary twist nucleus, thereby preventing reverse twist.
- An optically active compound is added for the purpose.
- any known optically active compounds can be used. Preferred examples thereof include the following optically active compounds (OP-1) to ( ⁇ P-8).
- liquid crystal composition according to the present invention By using the liquid crystal composition according to the present invention in a TFT liquid crystal display device, steepness and a viewing angle can be improved.
- the compound of the formula (1) is a low-viscosity compound, the response speed of a liquid crystal display device using the compound is improved and extremely large.
- the liquid crystal composition used in the present invention can be prepared by a conventional method. Generally, a method is used in which various components are dissolved at a high temperature. However, after dissolving and mixing in an organic solvent in which the liquid crystal dissolves, the solvent may be distilled off under reduced pressure.
- liquid crystal material of the present invention is improved and optimized according to the intended use by a suitable additive.
- suitable additives are well known to those skilled in the art and are described in detail in the literature and the like.
- a dichroic dye such as a merocyanine-based, styryl-based, azo-based, azomethine-based, azoxy-based, quinophthalone-based, anthraquinone-based, or tetrazine-based dye can be added to be used as a guest-host (GH) mode liquid crystal composition.
- GH guest-host
- liquid crystal for polymer dispersed liquid crystal display (PDLCD) represented by NCAP made by microencapsulation of nematic liquid crystal or polymer network liquid crystal display (PNLCD) made of three-dimensional network polymer in liquid crystal It can also be used as a composition. It can also be used as a liquid crystal composition for birefringence control (ECB) mode) dynamic scattering (DS) mode.
- ECB birefringence control
- DS dynamic scattering
- composition examples 1 to 25 can be shown as nematic liquid crystal compositions containing the compound of the present invention.
- the compounds in the composition examples are abbreviated according to the rules shown in the following table.
- the compound No. assigned to the compound of the present invention is the same as that shown in Examples described later.
- composition examples and examples “%” means “% by weight” unless otherwise specified.
- physical properties of the composition examples are as follows: TNI (NI transition point or clearing point: ° C), 7? (Viscosity: measurement temperature 20.0 ° C), ⁇ (refractive index anisotropy value: Measurement temperature 25.0), ⁇ (dielectric anisotropy value: measurement temperature 25.0 ° C) and Vth (threshold voltage: measurement temperature 25.0 ° C).
- V 2 -HB-C 100% 1 V 2 -HB-C 100%
- the pitch of the composition obtained by adding 0.3 parts by weight of the optically active compound ( ⁇ P-8) to 100 parts by weight of the above composition was 78.0 ⁇ m.
- the pitch of the composition obtained by adding 0.8 parts by weight of the optically active compound (0P-4) to 100 parts by weight of the above composition was 11.5 m.
- C is a crystal
- S is a smectic phase
- N is a nematic phase
- I is an isotropic liquid phase.
- the reaction mixture was gradually added to 500 ml of water, and the product was extracted with 800 ml of getyl ether and 400 ml of ethyl acetate in this order, and the organic layer was washed with 3N-hydrochloric acid 500 mK saturated sodium bicarbonate. After washing with water (500 mK brine, 600 ml) in this order, the solution was dried over magnesium sulfate, and the solvent was distilled off. The residue 73 g was hydrogenated in ethanol 75 Om 1 in the presence of 5% PdZC catalyst (3.0 g). After completion of the reaction, the catalyst was filtered off, and ethanol was distilled off under reduced pressure.
- Lithium aluminum hydride (hereinafter abbreviated as LAH) 2.68 g (70.6 mMol) was added dropwise with THF 30 ml at 0 ° C, and then cooled to 120 ° C. A solution of 13.4 g (35.3 mmo 1) of 4- (4-pentylcyclohexyl) cyclohexylmalonate in 300 ml of THF was added so that the liquid temperature did not exceed 110 ° C. After dropwise addition and stirring for 15 minutes, the reaction solution was warmed to room temperature and further stirred for 1 hour.
- LAH Lithium aluminum hydride
- the reaction mixture was cooled to 0 ° C, 100 ml of 1N-hydrochloric acid was added dropwise, 100 ml of 6N-hydrochloric acid was added, the product was extracted with ethyl acetate, and the organic layer was washed with water. After drying over magnesium sulfate, the solvent was distilled off. The residue was recrystallized using heptane to obtain 2- (4- (4-pentylcyclohexyl) cyclohexyl) -1,3-propanediol 10.0 g (32.3 mmo 1). The yield was 91.5%.
- Grignard reagent prepared from magnesium and 4-67- (4-pentylphenyl) -promobenzene in dry THF 11 at room temperature from 167 g (55 1 mmo 1) synthesized from cyclopentenedione at room temperature
- a solution of 6,10-dioxaspira ⁇ [4.5] decane-3-one 78.0 g (500 mm 01) in 500 ml of THF was added dropwise, and the mixture was stirred at room temperature for 5 hours.
- the reaction solution was added to 6N hydrochloric acid 11 and the product was extracted with ethyl acetate.
- the extract was washed with a saturated aqueous solution of sodium bicarbonate and water in this order, dried over anhydrous magnesium sulfate, and ethyl acetate was distilled off under reduced pressure.
- the residue was dissolved in toluene 11 and ion-exchange resin (Amberlyst) 5 g was added thereto, followed by heating under reflux for 5 hours.
- the ion-exchange resin was separated by filtration, and the filtrate was washed with saturated aqueous sodium hydrogen carbonate and water in this order, dried over anhydrous magnesium sulfate, and toluene was distilled off under reduced pressure.
- the purified product thus obtained was dissolved in 500 ml of a 1/1 mixed solvent of ethanol / ethyl acetate, and the mixture was dissolved in 10% Raney nickel (Raney ND HT-90, Kawaken Fine Chemical ( 20 g) and hydrogenated. Was. After the catalyst was filtered off, the filtrate was concentrated. This concentrate was dissolved in 500 ml of toluene, 50 ml of formic acid was added, and the mixture was heated and distilled for 5 hours.
- reaction solution was washed with water, saturated aqueous sodium hydrogen carbonate and brine in this order, dried over anhydrous magnesium sulfate, and toluene was distilled off under reduced pressure to obtain 3_ (4- (4-pentylphenyl) phenyl) cyclopentene. Evening 58.3 g (190 mm 0 1) of non was obtained. Its yield from 6,10-dioxaspiro [4.5] decane-3-one was 38.0%.
- the above 2- (4-pentylcyclohexyl) -12-propene-11-al is 39.3 g (200 mm 01) and acrylonitrile 30.0 g (563 mm o 1).
- the residue was dissolved in evening solution 11 and stirred at room temperature for 3 hours, and then refluxed for 2 hours. After completion of the reaction, the solvent and acrylonitrile were distilled off under reduced pressure.
- TB AH 2 F 3 tetrabutylammonium dihydrogen trifluoride
- 40.0 m 1 (16 Ommo 1) at room temperature, the above 5— (4-pentylcyclohexyl) (Cyclohexyl) -11,3-dithioxane-12-thione (2.10 g, 5.46 mMol) was added and stirred.
- To this solution was added 2.33 g (10.4 mmo 1) of N-iodinated succinimide, and the mixture was stirred at the same temperature for 45 minutes.
- THF 21 was added to 357 g (78 1 mmo 1) of dried 1,3-dioxane-2-ylethyltriphenylphosphonium bromide, and the mixture was cooled to 5 ° C with stirring. .
- 87.5 g (780 mm 01) of force butamoxide was added, and the mixture was stirred at the same temperature for 2 hours.
- To this reaction mixture was added dropwise a solution of 129 g (647 mm01) of 4- (4-cyanophenyl) cyclohexanone in 700 ml of THF, and the mixture was warmed to room temperature and stirred for 10 hours. . Water 1.51 was added to the reaction solution, and the product was extracted with ethyl acetate.
- TB AH 2 F 3 0.1% of tetrabutylammonium dihydrogen trifluoride
- 40.0 ml (16.0 mm 01) of this solution was added to the above 4- (2- (4-propylcyclohexyl)) at room temperature.
- (Ethyl) 1,4-dithioxolane 2-thione (1.44 g, 5.49 mmo 1) was added and stirred.
- To this solution was added 2.33 g (10.4 mmo 1) of N-iodinated succinimide, and the mixture was stirred at the same temperature for 45 minutes.
- a liquid crystal composition (A 1) comprising 45% of 4- (4-heptylcyclohexyl) benzonitrile and 15% of 4- (4- (4-pentylcyclohexyl) phenylbenzonitrile) was prepared.
- the clearing point of the liquid crystal composition was 7.1.7 ° C.
- the threshold voltage at a cell thickness of 9 ⁇ m was 1.78 V
- ⁇ was 11.0
- ⁇ was 0.137.
- Example 1 1) was prepared. The clearing point was 74.2 "C. The threshold voltage at a cell thickness of 8.8 ⁇ m was 1.6 ⁇ , ⁇ £ was 8.3, and ⁇ was 0.125. The physical properties of the compound of Example 1 calculated from the mixture ratio of the composition by the outer method were 88.4, ⁇ was 8.3, and ⁇ was 0.057, respectively. .
- Example 10 (Use example 2)
- a liquid crystal composition (A 1) consisting of 15% of 4- (4- (4-pentylcyclohexyl) phenylbenzonitrile was prepared.
- the clearing point of this nematic liquid crystal composition was 71.7 ° C, At a cell thickness of 9.2 ⁇ 111, the threshold voltage was 1.78 V, m e was 11.0, and ⁇ was 0.137.
- the liquid crystal composition (A 1) was 90% The compound of Example 6 of the present invention, 5-propyl-2- (2- (4- (4-cyanophenyl) cyclohexyl) ethenyl) -1,3-dioxane (compound N 0.383) 10%
- a liquid crystal composition (B 2) was prepared, which had a clear point of 80.7 ° C, a threshold voltage at a cell thickness of 9.2 ⁇ m of 1.7 IV, and ⁇ of 12.3.
- Example 11 From the liquid crystal composition (A 1) 85% and the compound 5- (4-chlorohexyl) -12-ethenyl-1,3-dioxane (Compound No. 37 1) 15% of Example 8 of the present invention The following liquid crystal composition (B4) was prepared. The clearing point was 69.5 ° C, the threshold voltage at a cell thickness of 9.0 1.111 was 1.79 ⁇ , ⁇ was 9.8, and mm1 was 0.125.
- the physical properties of the compound of Example 9 calculated from the mixture ratio of the above liquid crystal composition by the external method were 57.0 ° ⁇ of the clearing point of 3.0 and ⁇ of 0.057, respectively.
- the compound of the present invention has a small ⁇ , a large ⁇ £, a small ⁇ , a high clearing point, a small ⁇ , a nematic phase even at a low temperature, or a medium ⁇ . ⁇ is large.
- compound No. 31 has a large ⁇ and a high clearing point while having a very small ⁇ .
- compound No 3 83 has a moderate ⁇ and a very large ⁇ £.
- the compound of the present invention has a wide nematic phase temperature range at low temperatures, and therefore has excellent low-temperature compatibility. Since the compound of the present invention has such favorable characteristics, by using the compound of the present invention as a component of the liquid crystal composition, it is possible to provide a novel liquid crystal composition having characteristics that have been impossible so far or favorable characteristics. it can.
- a liquid crystal compound having a medium ⁇ and a large ⁇ ⁇ , a liquid crystal composition containing the same, and a liquid crystal display device constituted by using the same are used for various liquid crystal display devices including TFT type.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP98900685A EP0976703A1 (en) | 1997-01-22 | 1998-01-21 | Liquid-crystal compounds, liquid-crystal composition containing the same, and liquid-crystal display element containing the same |
JP53181898A JP4432123B2 (ja) | 1997-01-22 | 1998-01-21 | 液晶性化合物、およびこれを含む液晶組成物、およびこれを用いた液晶表示素子 |
AU55754/98A AU5575498A (en) | 1997-01-22 | 1998-01-21 | Liquid-crystal compounds, liquid-crystal composition containing the same, and liquid-crystal display element containing the same |
Applications Claiming Priority (2)
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JP9/9637 | 1997-01-22 | ||
JP963797 | 1997-01-22 |
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WO1998032721A1 true WO1998032721A1 (fr) | 1998-07-30 |
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PCT/JP1998/000222 WO1998032721A1 (fr) | 1997-01-22 | 1998-01-21 | Composes et composition a cristaux liquides et element graphique a cristaux liquides contenant lesdits composes |
Country Status (8)
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US (1) | US20020015804A1 (ja) |
EP (1) | EP0976703A1 (ja) |
JP (1) | JP4432123B2 (ja) |
KR (1) | KR20000070396A (ja) |
CN (1) | CN1249736A (ja) |
AU (1) | AU5575498A (ja) |
TW (1) | TW513481B (ja) |
WO (1) | WO1998032721A1 (ja) |
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JP2002155280A (ja) * | 2000-11-20 | 2002-05-28 | Chisso Corp | 液晶組成物および液晶表示素子 |
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US6146718A (en) * | 1998-06-10 | 2000-11-14 | Chisso Corporation | Liquid crystalline compound having a negative dielectric anisotropy value, liquid crystal composition containing the liquid crystalline compound, and liquid crystal display element produced utilizing the liquid crystal composition |
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JP2002524456A (ja) * | 1998-09-09 | 2002-08-06 | インフラジム ファーマシューティカルズ リミテッド | 置換されたγ−フェニル−Δ−ラクトンおよびそのアナログならびにこれらに関する使用 |
JP4979157B2 (ja) * | 1998-09-09 | 2012-07-18 | バイオリポックス アーべー | 置換されたγ−フェニル−Δ−ラクトンおよびそのアナログならびにこれらに関する使用 |
WO2000031211A1 (en) * | 1998-11-23 | 2000-06-02 | Rolic Ag | Liquid crystal compound |
JP2002121190A (ja) * | 2000-08-11 | 2002-04-23 | Chisso Corp | フッ素原子で置換されたジヒドロピラン誘導体 |
JP2002128776A (ja) * | 2000-08-11 | 2002-05-09 | Merck Patent Gmbh | ジオキサン誘導体および液晶媒体 |
JP4655357B2 (ja) * | 2000-11-20 | 2011-03-23 | チッソ株式会社 | 液晶組成物および液晶表示素子 |
JP2002155280A (ja) * | 2000-11-20 | 2002-05-28 | Chisso Corp | 液晶組成物および液晶表示素子 |
US6641872B2 (en) | 2000-11-20 | 2003-11-04 | Chisso Corporation | Liquid crystal composition and liquid crystal display element |
JP2004292774A (ja) * | 2003-03-28 | 2004-10-21 | Dainippon Ink & Chem Inc | 6員環ラクトン骨格を有する化合物を含有する液晶組成物 |
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US9523038B2 (en) | 2014-03-07 | 2016-12-20 | Jnc Corporation | Dihydropyran compound, liquid crystal composition and liquid crystal display device |
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JP4432123B2 (ja) | 2010-03-17 |
TW513481B (en) | 2002-12-11 |
EP0976703A1 (en) | 2000-02-02 |
CN1249736A (zh) | 2000-04-05 |
KR20000070396A (ko) | 2000-11-25 |
AU5575498A (en) | 1998-08-18 |
US20020015804A1 (en) | 2002-02-07 |
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