WO2010095493A1 - 誘電率異方性が負の液晶性化合物、これを用いた液晶組成物および液晶表示素子 - Google Patents
誘電率異方性が負の液晶性化合物、これを用いた液晶組成物および液晶表示素子 Download PDFInfo
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- WO2010095493A1 WO2010095493A1 PCT/JP2010/051005 JP2010051005W WO2010095493A1 WO 2010095493 A1 WO2010095493 A1 WO 2010095493A1 JP 2010051005 W JP2010051005 W JP 2010051005W WO 2010095493 A1 WO2010095493 A1 WO 2010095493A1
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- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
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- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
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- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
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- 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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- C09K2019/0411—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 chlorofluoro-benzene, e.g. 2-chloro-3-fluoro-phenylene-1,4-diyl
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- C09K2019/0466—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the linking chain being a -CF2O- chain
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
- C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
- C09K2019/308—Cy-Cy-COO-Ph-Ph
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- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
- C09K2019/3422—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a six-membered ring
- C09K2019/3425—Six-membered ring with oxygen(s) in fused, bridged or spiro ring systems
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
- G02F1/0045—Liquid crystals characterised by their physical properties
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13712—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
Definitions
- the present invention relates to a novel liquid crystalline compound useful as a material for a liquid crystal display device and a liquid crystal composition containing the compound. Specifically, it has low viscosity, good compatibility with other liquid crystal compounds, and has appropriate refractive index anisotropy and dielectric anisotropy, and when used in a liquid crystal display device
- the present invention relates to a novel liquid crystal compound capable of obtaining steep electro-optical characteristics, a liquid crystal composition containing the compound, and a liquid crystal display device containing the liquid crystal composition.
- a display element using a liquid crystal compound (in this application, the term liquid crystal compound is used as a generic term for a compound that exhibits a liquid crystal phase and a compound that does not exhibit a liquid crystal phase but is useful as a component of a liquid crystal composition).
- liquid crystal compound is used as a generic term for a compound that exhibits a liquid crystal phase and a compound that does not exhibit a liquid crystal phase but is useful as a component of a liquid crystal composition.
- display elements utilize the refractive index anisotropy and dielectric anisotropy of liquid crystal compounds.
- the liquid crystal phase includes a nematic liquid crystal phase, a smectic liquid crystal phase, and a cholesteric liquid crystal phase, and those using a nematic liquid crystal phase are most widely used.
- Display methods include dynamic scattering (DS) type, oriented phase deformation (DAP) type, guest / host (GH) type, twisted nematic (TN) type, super twisted nematic (STN) type, thin film transistor (TFT) type, There are a vertical alignment (VA) type, an in-plane switching (IPS) type, a polymer support alignment (PSA) type, and the like.
- liquid crystalline compounds used in these display systems exhibit a liquid crystal phase in a wide temperature range centered on room temperature, are sufficiently stable under the conditions in which the display element is used, and are sufficient to drive the display element. Although it must have characteristics, no single liquid crystal compound satisfying this condition has been found at present.
- liquid crystal composition having required characteristics is prepared by mixing several to several tens of liquid crystal compounds.
- These liquid crystal compositions are stable to moisture, light, heat and air that are usually present under the conditions in which the display element is used, are stable to electric fields and electromagnetic radiation, and are mixed.
- the compound is required to be chemically stable.
- the liquid crystal composition may have appropriate values of physical properties such as refractive index anisotropy ( ⁇ n) and dielectric anisotropy ( ⁇ ) depending on the display method and the shape of the display element. Needed.
- ⁇ n refractive index anisotropy
- ⁇ dielectric anisotropy
- the cell thickness of the liquid crystal display element constituting the liquid crystal display and the value of ⁇ n of the liquid crystal material used are constant (E. Jakeman et al., Pyhs. Lett., 39A. 69 (1972)).
- the response speed of the liquid crystal display element is inversely proportional to the square of the thickness of the cell used. Therefore, it is necessary to have a liquid crystal composition having a large ⁇ n value in order to manufacture a liquid crystal display element capable of high-speed response that can be applied to the display of moving images and the like.
- Various compounds have been developed as a single component of liquid crystal having a large value of ⁇ n.
- a compound having such a large ⁇ n has a highly conjugated molecular structure, but is not compatible with other liquid crystal materials. It tends to have poor solubility and is difficult to use as a component of a liquid crystal composition having good electrical characteristics. Furthermore, a liquid crystal compound used as a component of a liquid crystal composition requiring high insulation (specific resistance) such as a thin film transistor type liquid crystal display element is required to have high stability.
- the IPS mode, the VA mode, or the PSA mode is an operation mode using the vertical alignment of liquid crystal molecules, and the viewing angle that is a drawback of the conventional display modes such as the TN mode and the STN mode. It is known that the narrowness can be improved.
- Patent Document 1 discloses a compound represented by the formula (s-1) in which hydrogen on a benzene ring is replaced with fluorine
- Patent Document 2 discloses a benzene ring represented by the formula (s-2).
- Compounds in which the above hydrogen is replaced with fluorine and have alkenyl are being investigated.
- Patent Document 3 discloses compounds represented by the formulas (s-3), (s-4), and (s-5) as compounds in which the side group is a polar group such as halogen.
- Patent Document 4 discloses a compound in which the side group represented by the formulas (s-6), (s-7), (s-8) and (s-9) is a polar group such as halogen.
- a compound having a biphenyl ring having a fluorine or chlorine atom at the 2,3,3 ′ position and a —CH 2 O— and —COO— linking group as in the present application is not disclosed.
- the compounds represented by the formulas (s-3), (s-4) and (s-5) all have small optical anisotropy, a low upper limit temperature of the nematic phase, and no liquid crystal phase.
- the compounds represented by the formulas (s-5), (s-7), (s-8) and (s-9) all have small optical anisotropy, a low maximum temperature of the nematic phase, and a dielectric Since the rate anisotropy is small, the driving voltage cannot be lowered with a liquid crystal composition containing these.
- the compounds represented by the formulas (s-3) and (s-6) are required to be further improved such that the low-temperature compatibility is not sufficient.
- liquid crystal display element used in operation modes such as IPS mode, VA mode, and PSA mode still has problems as a display element as compared with a CRT, for example, an improvement in response speed and an improvement in contrast. Reduction of drive voltage is desired
- the display element that operates in the above-described IPS mode, VA mode, or PSA mode is mainly composed of a liquid crystal composition having negative dielectric anisotropy.
- the liquid crystalline compound contained in the liquid crystal composition is required to have the following properties (1) to (8). That is, (1) To have chemical stability and physical stability. (2) It has a high clearing point. The clearing point is the transition temperature between the liquid crystal phase and the isotropic phase. (3) It has a low lower limit temperature of the liquid crystal phase.
- the liquid crystal phase means a nematic phase, a smectic phase, or the like. (4) It has a small viscosity. (5) It has appropriate optical anisotropy.
- a composition containing a chemically and physically stable liquid crystal compound as in (1) When a composition containing a chemically and physically stable liquid crystal compound as in (1) is used for a display element, the voltage holding ratio can be increased.
- a composition containing a liquid crystal compound having a high clearing point or a low lower limit temperature of the liquid crystal phase can expand the temperature range of the nematic phase, and in a wide temperature range. It can be used as a display element.
- the threshold voltage of the liquid crystal composition containing this compound can be lowered, so that an appropriate negative voltage can be obtained as in (6).
- the driving voltage of the display element can be lowered and the power consumption can be reduced.
- the liquid crystal compound is generally used as a composition prepared by mixing with many other liquid crystal compounds in order to develop characteristics that are difficult to be exhibited by a single compound. Therefore, the liquid crystalline compound used for the display element preferably has good compatibility with other liquid crystalline compounds as in (8). In addition, since the display element may be used in a wide temperature range including below freezing point, it may be preferable that the display element is a compound showing good compatibility from a low temperature range.
- the first object of the present invention is to eliminate the disadvantages of the prior art, and to provide general physical properties necessary for liquid crystal compounds, that is, stability to heat, light, etc., small viscosity, and refractive index anisotropy of an appropriate size.
- the second object is to provide a liquid crystal composition containing this liquid crystalline compound and having a high upper limit temperature of the nematic phase, a lower lower limit temperature of the nematic phase, a small viscosity, an appropriate optical anisotropy, and a low threshold voltage.
- it is to provide a liquid crystal composition having a high maximum temperature of the nematic phase and a low minimum temperature of the nematic phase.
- a third object is to provide a liquid crystal display element containing this composition and having a wide temperature range that can be used, a short response time, a small power consumption, a large contrast, and a low driving voltage, and can be used in particular.
- a liquid crystal display device having a wide temperature range is provided.
- a biphenyl compound having a polar group such as a halogen on the side group has an extremely large elastic constant K 33 (K 33 : bend elastic constant) and a very low viscosity. It was found to have high chemical stability, wide nematic phase temperature range, large refractive index anisotropy and negative dielectric anisotropy. Furthermore, it has been found that when a liquid crystal composition containing the above compound is used, a liquid crystal display element having steep electro-optical characteristics, a short response time, a wide operating temperature range, and a small driving power can be produced. Therefore, the present inventors have found that the above compounds are suitable for liquid crystal display elements, particularly liquid crystal display elements such as ECB, IPS, VA, and PSA, which are currently widely used, and have completed the present invention.
- liquid crystal display elements particularly liquid crystal display elements such as ECB, IPS, VA, and PSA
- the gist of the present invention is as follows. 1. The compound represented by Formula (1).
- R 1 and R 2 are each independently alkyl having 1 to 9 carbons, or alkenyl having 2 to 9 carbons, alkoxy having 1 to 8 carbons, or alkenyloxy having 2 to 8 carbons.
- Q 1 and Q 4 are each independently fluorine or chlorine
- Q 2 and Q 3 are each independently hydrogen, fluorine or chlorine, one of Q 2 and Q 3 is always hydrogen, and the other is always fluorine or chlorine
- Z is —CH 2 O— or —COO—
- h is 1 or 2
- Q 1 and Q 2 are both fluorine, h is 1.
- Item 2 The compound according to Item 1, wherein Q 1 , Q 2 and Q 4 are fluorine, and Q 3 is hydrogen. 3.
- Item 2. The compound according to item 1, wherein Q 1 , Q 3 and Q 4 are fluorine, and Q 2 is hydrogen. 4).
- Item 2. The compound according to Item 1, wherein Z is —CH 2 O—.
- Item 2 A liquid crystal composition comprising two or more compounds, comprising at least one compound according to any one of items 1 to 3. 6).
- Item 6 The liquid crystal composition according to item 5, comprising at least one compound selected from the group of compounds represented by formulas (2), (3), and (4).
- R 3 is independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in alkyl and alkenyl, any hydrogen may be replaced by fluorine, and any —CH 2 — May be replaced by -O-;
- X 1 is independently fluorine, chlorine, —OCF 3 , —OCHF 2 , —CF 3 , —CHF 2 , —CH 2 F, —OCF 2 CHF 2 or —OCF 2 CHFCF 3 ;
- Ring A 1 , Ring A 2 and Ring A 3 are independently 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl, 1-pyran-2,5- Diyl or 1,4-phenylene in which optional hydrogen may be replaced by fluorine;
- Z 1 and Z 2 are independently — (CH 2 ) 2 —, — (CH 2 ) 4 —, —COO—, —
- R 4 is alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in the alkyl and alkenyl, any hydrogen may be replaced by fluorine, and any —CH 2 — represents —O May be replaced by-;
- X 2 is —C ⁇ N or —C ⁇ C—C ⁇ N;
- Ring B 1 , Ring B 2 and Ring B 3 are independently 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1-pyran-2,5-diyl, pyrimidine-2,5- Diyl or 1,4-phenylene in which any hydrogen may be replaced by fluorine;
- Z 3 is — (CH 2 ) 2 —, —COO—, —CF 2 O—, —OCF 2 —, —C ⁇ C—, —CH 2 O— or a single bond;
- L 3 and L 4 are independently hydrogen or fluorine;
- q is 0, 1 or 2
- Item 6 The item according to Item 5, comprising at least one compound selected from the group of compounds represented by each of formulas (6), (7), (8), (9), (10) and (11): Liquid crystal composition.
- R 5 and R 6 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in alkyl and alkenyl, any hydrogen may be replaced by fluorine, and any — CH 2 — may be replaced by —O—;
- Ring C 1 , Ring C 2 , Ring C 3 and Ring C 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 6-pyran-2,5-diyl or Decahydro-2,6-naphthalene;
- Z 4 , Z 5 , Z 6 and Z 7 are independently — (CH 2 ) 2 —, —COO—, —CH 2 O—, —OCF 2 —, —OCF 2 (CH 2 ) 2 — or a single bond Is;
- L 5 and L 6 are independently fluorine or chlorine;
- j, k, l, m, n, and p are each independently 0 or 1, and
- R 7 and R 8 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in this alkyl and alkenyl, any —CH 2 — is replaced by —O—.
- Well; Ring D 1 , Ring D 2 and Ring D 3 are independently 1,4-cyclohexylene, pyrimidine-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro- 1,4-phenylene or 2,5-difluoro1,4-phenylene;
- Z 8 and Z 9 are independently —C ⁇ C—, —COO—, — (CH 2 ) 2 —, —CH ⁇ CH— or a single bond.
- Item 7. The liquid crystal composition according to item 6, further comprising at least one compound selected from the group of compounds represented by formula (5). 11. Item 7. The liquid crystal composition according to item 6, further comprising at least one compound selected from the group of compounds represented by formulas (12), (13), and (14). 12 Item 8. The liquid crystal composition according to item 7, further comprising at least one compound selected from the group of compounds represented by formulas (12), (13), and (14). 13. Item 9. The liquid crystal composition according to item 8, further comprising at least one compound selected from the group of compounds represented by formulas (12), (13), and (14). 14 Item 6. The liquid crystal composition according to item 5, further comprising at least one optically active compound and / or polymerizable compound. 15. Item 6. The liquid crystal composition according to item 5, further comprising at least one antioxidant and / or ultraviolet absorber. 16. Item 6. A liquid crystal display device comprising the liquid crystal composition according to item 5.
- the compound of the present invention has general physical properties necessary for liquid crystal compounds, stability to heat, light, etc., small viscosity, appropriate optical anisotropy, appropriate negative dielectric anisotropy, And excellent compatibility with other liquid crystal compounds.
- the liquid crystal composition of the present invention contains at least one of these compounds, and has a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, an appropriate optical anisotropy, and an appropriate elasticity.
- constant K 33 with a (K 33 bend elastic constant) and a low threshold voltage.
- the liquid crystal display element of the present invention contains this composition and has a wide temperature range that can be used, a short response time, a small power consumption, a large contrast ratio, and a low driving voltage.
- the compound of the present invention is superior in compatibility with other liquid crystal materials, has a low viscosity, and has a wide liquid crystal temperature range as compared with known compounds having the same structure. Moreover, compared with a similar compound, it has a low threshold voltage and a relatively low viscosity. Further, the compound of the present invention is physically and chemically sufficiently stable under the conditions in which the liquid crystal display device is normally used, and is extremely excellent as a constituent component of the nematic liquid crystal composition, and is a TN type, STN type, TFT type, VA type, It can be suitably used as a component of liquid crystal compositions for IPS type and PSA type.
- a liquid crystal compound is a generic term for a compound having a liquid crystal phase such as a nematic phase or a smectic phase and a compound having no liquid crystal phase but useful as a component of a liquid crystal composition.
- a liquid crystal compound, a liquid crystal composition, and a liquid crystal display element may be abbreviated as a compound, a composition, and an element, respectively.
- a liquid crystal display element is a general term for a liquid crystal display panel and a liquid crystal display module.
- the upper limit temperature of the nematic phase is the phase transition temperature of the nematic phase-isotropic phase, and may simply be abbreviated as the upper limit temperature.
- the lower limit temperature of the nematic phase may simply be abbreviated as the lower limit temperature.
- the compound represented by formula (1) may be abbreviated as compound (1). This abbreviation may also apply to compounds represented by formula (2) and the like.
- symbols such as A 1 , B 1 , C 1 , D 1 surrounded by hexagons correspond to the ring A 1 , the ring B 1 , the ring C 1 , the ring D 1, etc., respectively. .
- a plurality of the same symbols are described in the same formula or different formulas, but each may be the same or different.
- Alkyl in which any —CH 2 — may be replaced by —O— or —CH ⁇ CH— includes alkyl, alkenyl, alkoxy, alkoxyalkyl, alkoxyalkenyl, alkenyloxyalkyl, and the like.
- Compound (1) is a tricyclic or tetracyclic compound having a biphenyl ring having a fluorine or chlorine atom at the 2,3,3 ′ positions.
- This compound is extremely physically and chemically stable under the conditions under which the device is normally used, and has good compatibility with other liquid crystal compounds.
- a composition containing this compound is stable under conditions in which the device is normally used. Even when the composition is stored at a low temperature, the compound does not precipitate as crystals (or a smectic phase).
- This compound has general physical properties necessary for the compound, appropriate optical anisotropy, and appropriate negative dielectric anisotropy.
- the physical properties such as optical anisotropy and dielectric anisotropy can be arbitrarily adjusted by appropriately selecting the terminal group, ring structure and bonding group of compound (1).
- the effects of the preferred terminal group, the bonding group Z, and their kind in the compound (1) on the physical properties of the compound (1) will be described below.
- R 1 and R 2 are preferably linear. When it is linear, the temperature range of the liquid crystal phase is wide and the viscosity is small. When either R 1 or R 2 is a branched chain, the compatibility with other liquid crystal compounds is good. A compound in which either R 1 or R 2 is an optically active group is useful as a chiral dopant. By adding this compound to the composition, a reverse twisted domain generated in the device can be prevented. Compounds in which R 1 and R 2 are not optically active groups are useful as components of the composition.
- R 1 and R 2 are each independently alkyl having 1 to 9 carbons, or alkenyl having 2 to 9 carbons, alkoxy having 1 to 8 carbons, or alkenyl having 2 to 8 carbons. It is oxy.
- R 1 and R 2 can be selected with reference to the following specific examples depending on the use of the compound.
- alkenyl or alkenyloxy is a group in which any — (CH 2 ) 2 — in alkyl is replaced by —CH ⁇ CH— or the like, and is shown as an example.
- Examples of groups in which any — (CH 2 ) 2 — in CH 3 (CH 2 ) 3 — is replaced by —CH ⁇ CH— are H 2 C ⁇ CH— (CH 2 ) 2 —, CH 3 —CH ⁇ CH—CH 2 — and the like.
- the term “arbitrary” means “at least one selected without distinction”.
- the preferred configuration of —CH ⁇ CH— in alkenyl depends on the position of the double bond.
- alkenyl having a double bond at odd positions such as —CH ⁇ CHCH 3 , —CH ⁇ CHC 2 H 5 , —CH ⁇ CHC 3 H 7 and —CH ⁇ CHC 4 H 9 .
- An alkenyl compound having a desirable configuration described above has a wide temperature range of liquid crystal phase, has large elastic constant K 33, it is possible to reduce the viscosity of the compound, further, the liquid crystal composition of this liquid crystal compound When added to, the upper limit temperature (T NI ) of the nematic phase can be increased.
- T NI upper limit temperature
- -CH 2 CH CHCH 3
- R 1 and R 2 are —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , —C 5 H 11 , —C 6 H 13 , —C 7. H 15 , —C 8 H 17 , —C 9 H 19 , —OCH 3 , —OC 2 H 5 , —OC 3 H 7 , —OC 4 H 9 , —OC 5 H 11 , —OC 6 H 13 , — OC 7 H 15 , —OC 8 H 17 , —CH ⁇ CH 2 , —CH ⁇ CHCH 3 , —CH ⁇ CHC 2 H 5 , — (CH 2 ) 2 CH ⁇ CH 2 , —CH ⁇ CHC 3 H 7 , — (CH 2 ) 2 CH ⁇ CHCH 3 , —CH ⁇ CHC 4 H 9 , — (CH 2 ) 2 CH ⁇ CHC 2 H 5 , —CH ⁇ CH (CH 2 ) 2 CH ⁇ CHCH 3 ,
- R 1 and R 2 include —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , —C 5 H 11 , —C 6 H 13 , —C 7 H 15 , —C 8 H 17 , —C 9 H 19 , —OCH 3 , —OC 2 H 5 , —OC 3 H 7 , —OC 4 H 9 , —OC 5 H 11 , —OC 6 H 13 , —CH ⁇ CH 2 , —CH ⁇ CHCH 3 , — (CH 2 ) 2 CH ⁇ CH 2 , — (CH 2 ) 2 CH ⁇ CHCH 3 , —OCH ⁇ CH 2 , —OCH ⁇ CHCH 3 , —OCH 2 CH ⁇ CH 2 , —OCH ⁇ CHC 2 H 5 , —OCH 2 CH ⁇ CHCH 3 , —O (CH 2 ) 2 CH ⁇ CH 2 , —OCH ⁇ CHC 3 H 7
- Q 1 and Q 4 are each independently fluorine or chlorine
- Q 2 and Q 3 are each independently hydrogen, fluorine or chlorine
- Q 2 and either Q 3 are a necessarily hydrogen, the other is always fluorine or chlorine.
- Compound (1) has a large negative dielectric anisotropy.
- a compound having a large dielectric anisotropy is useful as a component for lowering the threshold voltage of the composition.
- the linking group Z in the compound (1) is —COO— or —CH 2 O—.
- the optical anisotropy is negatively large due to this bonding group. Further, when the bonding group Z is —CH 2 O—, the viscosity is small.
- the liquid crystal compound When the liquid crystal compound has a structure represented by these liquid crystal compounds (1), it has an appropriate negative dielectric anisotropy and is extremely compatible with other liquid crystal compounds. Furthermore, it has stability against heat, light and the like, has a nematic phase over a wide temperature range, has a low viscosity, has a large optical anisotropy, and appropriate elastic constants K 33 and K 11 . When the liquid crystal compound (1) has a tricycle, the viscosity is small. When the liquid crystal compound (1) has a tetracycle, the maximum temperature is high. As described above, a compound having desired physical properties can be obtained by appropriately selecting the type of terminal group, ring structure and bonding group, and the number of rings. In addition, the liquid crystal composition containing the liquid crystal compound (1) is stable under conditions in which the liquid crystal display element is normally used, and the compound precipitates as crystals (or smectic phases) even when stored at a low temperature. There is nothing to do.
- the liquid crystal compound (1) can be suitably applied to a liquid crystal composition used for a liquid crystal display element in a display mode such as PC, TN, STN, ECB, OCB, IPS, VA, or PSA. Or it can apply especially suitably to the liquid crystal composition used for the liquid crystal display element of display modes, such as PSA.
- the compound represented by the formula (1) of the present invention can be obtained by introducing a predetermined group into R 1 , R 2 , Q 1 , Q 2 , Q 3 , Q 4 and Z in the formula.
- a group can be introduced by a known general organic synthesis method. Typical synthesis examples include the methods described in New Experimental Chemistry Course 14 Synthesis and Reaction of Organic Compounds (1978) Maruzen or Fourth Edition Experimental Chemistry Course 19-26 Organic Synthesis I-VIII (1991) Maruzen Can do.
- MSG 1 or MSG 2 is a monovalent organic group having at least one ring.
- a plurality of MSG 1 (or MSG 2 ) used in the scheme may be the same or different.
- Compounds (1A) and (1B) correspond to compound (1).
- liquid crystal compound (1) that is, the liquid crystal compound represented by the above formula (1) are shown.
- R 1 , R 2 , Z, Q 1 , Q 2 , Q 3 , Q 4 and h have the same meaning as described above.
- Compound (1a) is reacted with n-butyllithium to prepare a lithium salt, which is reacted with borate ester and hydrolyzed in an acidic atmosphere to obtain a dihydroxyborane derivative (1b).
- Biphenyl derivative (1d) is obtained by reacting compound (1b) with phenol derivative (1c) in the presence of a base such as sodium carbonate and a catalyst such as Pd—C.
- the compound represented by the formula (1) is a compound represented by the formulas (1-1) and (1-2), the compatibility with other liquid crystal compositions is good and the viscosity is small.
- the compound represented by the formula (1) is a compound represented by the formulas (1-3) and (1-4), the maximum temperature (T NI ) of the nematic phase is high.
- a liquid crystal compound which is an example of the liquid crystal compound (1) of the present invention by reacting the compound (1 g) with a biphenyl derivative (1d) in the presence of a base such as sodium carbonate. (1h) can be manufactured.
- the liquid crystal composition of the present invention needs to contain the compound represented by the formula (1) of the present invention as the component A.
- the composition of only component A or a composition of component A and other components not specifically indicated in the present specification may be used, but components B, C, D and E shown below for component A are as follows.
- the liquid crystal composition of the present invention having various characteristics can be provided.
- Component B consisting of at least one compound selected from the group consisting of Formulas (2), (3) and (4), and at least selected from the group consisting of Formula (5)
- Component C consisting of one compound
- Component D consisting of at least one compound selected from the group consisting of the above formulas (6), (7), (8), (9), (10) and (11)
- a mixture of component E composed of at least one compound selected from the group consisting of formulas (12), (13) and (14).
- each component of the liquid crystal composition used in the present invention is not greatly different in physical properties even if it is an analog composed of an isotope element of each element.
- formulas (2-1) to (2-16) are preferred examples of the compound represented by formula (2), and formulas (3-1) to (2) are preferred examples of the compound represented by formula (3).
- Preferred examples of the compound represented by (3-112) and formula (4) include formulas (4-1) to (4-54), respectively.
- component B have a positive dielectric anisotropy and are very excellent in thermal stability and chemical stability. It is used when preparing a liquid crystal composition.
- the content of component B in the liquid crystal composition of the present invention is suitably in the range of 1 to 99% by weight with respect to the total weight of the liquid crystal composition, preferably 10 to 97% by weight, more preferably 40 to 95% by weight. It is. Further, the viscosity can be adjusted by further containing a compound represented by formulas (12) to (14) (component E).
- Preferred examples of the compound represented by the formula (5), that is, the component C include (5-1) to (5-64).
- these compounds represented by the formula (5) that is, the component C are mainly used when preparing liquid crystal compositions for STN, TN, and PSA because the dielectric anisotropy is positive and the value is very large.
- the threshold voltage of the composition can be reduced.
- adjustment of viscosity, adjustment of refractive index anisotropy, and liquid crystal phase temperature range can be expanded. It can also be used to improve steepness.
- the content of component C can be applied in the range of 0.1 to 99.9% by weight, preferably 10 to 97% by weight, more preferably 40 to 40%. 95% by weight.
- the threshold voltage, the liquid crystal phase temperature range, the refractive index anisotropy, the dielectric anisotropy, the viscosity, and the like can be adjusted by mixing the components described later.
- Component D consisting of at least one compound selected from the group consisting of formulas (6) to (11) can be used in vertical alignment mode (VA mode), polymer supported alignment mode (PSA mode), etc. This is a preferred component when the liquid crystal composition of the present invention having a negative dielectric anisotropy is used.
- Preferable examples of the compounds (component D) represented by the formulas (6) to (11) are the formulas (6-1) to (6-6), (7-1) to (7-15), (8 -1), (9-1) to (9-3), (10-1) to (10-11), and (11-1) to (11-10).
- These compounds of component D are mainly used in VA mode and PSA mode liquid crystal compositions having a negative dielectric anisotropy value. Increasing the content lowers the threshold voltage of the composition, but increases the viscosity. Therefore, it is preferable to reduce the content as long as the required value of the threshold voltage is satisfied. However, since the absolute value of dielectric anisotropy is about 5, if the content is less than 40% by weight, voltage driving may not be possible.
- the compound represented by the formula (6) among the component D is a bicyclic compound, it is mainly effective in adjusting the threshold voltage, adjusting the viscosity, or adjusting the refractive index anisotropy. Further, since the compounds represented by the formulas (7) and (8) are tricyclic compounds, the clearing point is increased, the nematic range is increased, the threshold voltage is decreased, and the refractive index anisotropy is increased. The effect of doing etc. is acquired. In addition, Expressions (9), (10), and (11) can provide effects such as lowering the threshold voltage.
- the content of Component D is preferably 40% by weight or more, more preferably 50 to 95% by weight, based on the total amount of the composition when a composition for VA mode or PSA mode is prepared. Further, by mixing the component D, it is possible to control the elastic constant and control the voltage transmittance curve of the composition. When component D is mixed with a composition having a positive dielectric anisotropy, the content is preferably 30% by weight or less based on the total amount of the composition.
- Preferable examples of the compound (component E) represented by the formulas (12), (13) and (14) are the formulas (12-1) to (12-11) and (13-1) to (13-19), respectively. And (14-1) to (14-6).
- the compounds represented by formulas (12) to (14) are compounds having a small absolute value of dielectric anisotropy and close to neutrality.
- component E the threshold voltage, liquid crystal phase temperature range, refractive index anisotropy, dielectric anisotropy, viscosity and the like can be adjusted.
- the compound represented by the formula (12) mainly has an effect of adjusting viscosity or refractive index anisotropy, and the compounds represented by the formulas (13) and (14) are nematic ranges such as increasing the clearing point. Has the effect of widening the refractive index or adjusting the refractive index anisotropy.
- the content of component E is preferably 30% by weight or more, more preferably 50% by weight or more based on the total amount of the composition. Further, when preparing a liquid crystal composition for TN, STN, or PSA, the content of component E is preferably 30% by weight or more, more preferably 40% by weight or more based on the total amount of the composition. .
- the liquid crystal composition of the present invention preferably contains at least one compound represented by the formula (1) of the present invention in a proportion of 0.1 to 99% by weight in order to develop excellent characteristics.
- the liquid crystal composition of the present invention is generally prepared by a known method, for example, a method of dissolving necessary components at a high temperature.
- an additive well known to those skilled in the art is added depending on the application, for example, an optically active compound as described below, a polymerizable compound, a liquid crystal composition of the present invention containing a polymerization initiator, a dye
- a liquid crystal composition for GH type to which is added can be prepared.
- additives are well known to those skilled in the art and are described in detail in the literature.
- the liquid crystal composition of the present invention may further contain one or more optically active compounds.
- a known chiral dopant is added as an optically active compound. This chiral dopant has the effect of inducing the helical structure of the liquid crystal to adjust the necessary twist angle and preventing reverse twist. Examples of the chiral dopant include the following optically active compounds.
- these optically active compounds are usually added to adjust the twist pitch.
- the twist pitch is preferably adjusted in the range of 40 to 200 ⁇ m for TFT and TN liquid crystal compositions.
- a liquid crystal composition for STN it is preferably adjusted to a range of 6 to 20 ⁇ m.
- a bistable TN (Bistable TN) mode it is preferable to adjust to a range of 1.5 to 4 ⁇ m.
- Two or more optically active compounds may be added for the purpose of adjusting the temperature dependence of the pitch.
- the liquid crystal composition of the present invention can be obtained as a GH type liquid crystal composition by adding a dichroic dye such as merocyanine, styryl, azo, azomethine, azoxy, quinophthalone, anthraquinone, and tetrazine. It can also be used.
- a dichroic dye such as merocyanine, styryl, azo, azomethine, azoxy, quinophthalone, anthraquinone, and tetrazine. It can also be used.
- the liquid crystal composition of the present invention is an NCAP produced by encapsulating nematic liquid crystals, or a polymer dispersed liquid crystal display device (PDLCD) produced by forming a three-dimensional network polymer in a liquid crystal, such as a polymer network. It can be used as a liquid crystal composition for birefringence control (ECB) type and DS type as well as for liquid crystal display elements (PNLCD).
- ECB birefringence control
- PLCD liquid crystal display elements
- the liquid crystal composition according to the present invention When an ultraviolet absorber or an antioxidant is added to the liquid crystal composition according to the present invention, it is possible to prevent deterioration of the liquid crystal composition and the liquid crystal display element containing the liquid crystal composition.
- the antioxidant can suppress a decrease in specific resistance value when the liquid crystal composition is heated.
- UV absorber examples include benzophenone UV absorbers, benzoate UV absorbers, and triazole UV absorbers.
- a specific example of the benzophenone-based ultraviolet absorber is 2-hydroxy-4-n-octoxybenzophenone.
- a specific example of the benzoate ultraviolet absorber is 2,4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate.
- Specific examples of the triazole ultraviolet absorber include 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- [2-hydroxy-3- (3,4,5,6-tetrahydroxyphthalimide-methyl)- 5-methylphenyl] benzotriazole, and 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole.
- an antioxidant represented by the following formula is preferable.
- w is an integer of 1 to 15.
- w is 1, 3, 5, 7, or 9. Further preferred w is 1 or 7. Since the compound (15) in which w is 1 has high volatility, it is effective in preventing a decrease in specific resistance due to heating in the atmosphere. Since the compound (15) in which w is 7 has low volatility, it is effective for maintaining a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature of the nematic phase after using the device for a long time. .
- phenolic antioxidants include 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol, 2,6-di-t-butyl- 4-propylphenol, 2,6-di-t-butyl-4-butylphenol, 2,6-di-t-butyl-4-pentylphenol, 2,6-di-t-butyl-4-hexylphenol, 2 , 6-di-t-butyl-4-heptylphenol, 2,6-di-t-butyl-4-octylphenol, 2,6-di-t-butyl-4-nonylphenol, 2,6-di-t- Butyl-4-decylphenol, 2,6-di-t-butyl-4-undecylphenol, 2, 6-di-t-butyl-4-dodecylphenol, 2,6-di-t-butyl-4-tridecylphenol
- organic sulfur antioxidant examples include dilauryl-3,3′-thiopropionate, dimyristyl-3,3′-thiopropionate, distearyl-3,3′-thiopropionate, pentaerythritol Tetrakis (3-laurylthiopropionate) and 2-mercaptobenzimidazole.
- the addition amount of the above-mentioned additives represented by ultraviolet absorbers, antioxidants and the like can be added and used within a range that can achieve the purpose of adding the additive without impairing the object of the present invention.
- the addition ratio is usually in the range of 10 ppm to 500 ppm, preferably 30 to 300 ppm, based on the total weight of the liquid crystal composition according to the present invention.
- the range is more preferably 40 to 200 ppm.
- the liquid crystal composition according to the present invention includes impurities such as synthesis raw materials, by-products, reaction solvents, and synthesis catalysts that are mixed in the synthesis process of each compound constituting the liquid crystal composition, the liquid crystal composition preparation process, and the like. In some cases.
- a polymerizable compound is mixed with the composition to be compatible with a PSA (Polymer Sustained Alignment) mode element.
- Preferred examples of the polymerizable compound are compounds having a polymerizable group such as acrylate, methacrylate, vinyl, vinyloxy, propenyl ether, epoxy (oxirane, oxetane), vinyl ketone and the like. Particularly preferred examples are acrylate or methacrylate derivatives.
- a desirable ratio of the polymerizable compound is 0.05% by weight or more for obtaining the effect thereof, and is 10% by weight or less for preventing defective display. A more desirable ratio is in the range of 0.1% to 2% by weight.
- the polymerizable compound is preferably polymerized by UV irradiation or the like in the presence of a suitable initiator such as a photopolymerization initiator.
- a suitable initiator such as a photopolymerization initiator.
- Appropriate conditions for polymerization, the appropriate type of initiator, and the appropriate amount are known to those skilled in the art and are described in the literature.
- Irgacure 651 registered trademark
- Irgacure 184 registered trademark
- Darocure 1173 registered trademark
- the polymerizable compound preferably contains a photopolymerization initiator in the range of 0.1% to 5% by weight.
- the photopolymerization initiator is contained in the range of 1% by weight to 3% by weight.
- liquid crystal composition according to the present invention for example, when the compound constituting each component is a liquid, the respective compounds are mixed and shaken, and when the compound includes a solid, the respective compounds are mixed. It can be prepared by making each liquid by heating and then shaking.
- the liquid crystal composition according to the present invention can also be prepared by other known methods.
- the upper limit temperature of the nematic phase can be set to 70 ° C. or higher
- the lower limit temperature of the nematic phase can be set to ⁇ 20 ° C. or lower
- the temperature range of the nematic phase is wide. Therefore, a liquid crystal display element including this liquid crystal composition can be used in a wide temperature range.
- an optical anisotropy in the range of 0.05 to 0.18, preferably an optical anisotropy in the range of 0.09 to 0.13, by appropriately adjusting the composition and the like. can be obtained.
- the liquid crystal composition in the above numerical range can be suitably used as a liquid crystal display element that operates in the TN mode, STN mode, or TFT mode.
- the dielectric anisotropy is usually in the range of ⁇ 5.0 to ⁇ 2.0, preferably the dielectric anisotropy in the range of ⁇ 4.5 to ⁇ 2.5.
- a liquid crystal composition having properties can be obtained.
- the liquid crystal composition in the above numerical range can be suitably used as a liquid crystal display element operating in the IPS mode, VA mode, or PSA mode.
- the liquid crystal composition according to the present invention has operation modes such as a PC mode, a TN mode, an STN mode, and an OCB mode, and not only a liquid crystal display element driven by an AM mode, but also a PC mode, a TN mode, an STN mode, and an OCB. It can also be used for a liquid crystal display element that has an operation mode such as a mode, a VA mode, an IPS mode, or a PSA mode and is driven by a passive matrix (PM) method.
- PM passive matrix
- the liquid crystal composition according to the present invention includes a DS (dynamic scattering) mode element using a liquid crystal composition to which a conductive agent is added, and an NCAP (nematic curvilinear aligned phase) element manufactured by microencapsulating a liquid crystal composition.
- a PD (polymer dispersed) element in which a three-dimensional network polymer is formed in a liquid crystal composition, for example, a PN (polymer network) element.
- the liquid crystal composition according to the present invention since the liquid crystal composition according to the present invention has the above-described characteristics, it is driven in an operation mode using a liquid crystal composition having a negative dielectric anisotropy such as a VA mode, an IPS mode, or a PSA mode.
- the liquid crystal display element can be suitably used for an AM liquid crystal display element, and can be particularly suitably used for an AM liquid crystal display element driven in a VA mode.
- a sample was prepared in an acetone solution (0.1% by weight), and 1 ⁇ l thereof was injected into the sample vaporization chamber.
- the recorder is a C-R7A Chromatopac manufactured by Shimadzu Corporation or an equivalent.
- the obtained gas chromatogram showed the peak retention time and peak area corresponding to the component compounds.
- the sample was dissolved in toluene to prepare a 1% by weight solution, and 1 ⁇ l of the resulting solution was injected into the sample vaporization chamber.
- a recorder a C-R7A Chromatopac manufactured by Shimadzu Corporation or an equivalent thereof was used.
- the obtained gas chromatogram shows the peak retention time and peak area value corresponding to the component compounds.
- a dilution solvent for the sample for example, chloroform or hexane may be used.
- a dilution solvent for the sample for example, chloroform or hexane may be used.
- Agilent Technologies Inc. Capillary column DB-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), Agilent Technologies Inc. HP-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m) manufactured by Restek Corporation, Rtx-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), SGE International Pty. BP-1 made of Ltd (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m) or the like may be used.
- the peak area ratio in the gas chromatogram corresponds to the ratio of the component compounds.
- the weight% of the component compound of the analysis sample is not completely the same as the area% of each peak of the analysis sample.
- the correction factor is substantially 1. Therefore, the weight% of the component compound in the analysis sample substantially corresponds to the area% of each peak in the analysis sample. This is because there is no significant difference in the correction coefficients of the component liquid crystal compounds.
- an internal standard method using gas chromatogram is used.
- test component liquid crystal compound component
- reference liquid crystal compound reference material
- T-3 1-ethoxy-2,3-difluorophenylboronic acid (T-3)
- T-2 (19.5 g) obtained by the above operation was dissolved in dry tetrahydrofuran (hereinafter referred to as DryTHF) (500 ml). And cooled to -70 ° C. N-BuLi (500 ml) was added dropwise under a nitrogen atmosphere, and the mixture was stirred at -70 ° C for 2 hours. Thereafter, a dry THF solution of trimethyl borate (129.5 g) was slowly added dropwise at ⁇ 70 ° C., and the mixture was warmed to room temperature and stirred for 16 hours.
- DryTHF dry tetrahydrofuran
- the physical property values were calculated by extrapolation from the values obtained by measurement by preparing a sample by mixing 15% by weight of the compound and 85% by weight of the mother liquid crystal A as described in the section of the composition example below. .
- Extrapolated value (measured value of sample ⁇ 0.85 ⁇ measured value of mother liquid crystal A) /0.15.
- Example 2 4-Ethoxy-2,3,3′-trifluoro-4 ′-((pentylcyclohexyl) methoxy) biphenyl (1-1-29) was prepared in the same manner as described in Example 1, and 4′-ethoxy- 2 ', 3,3'-trifluorobiphenyl-4-ol (3.00 g) and 1-chloromethyl-4-pentylcyclohexane (2.95 g) were obtained as a white powder (3.66 g). Yield 62%.
- Example 3 4-Butoxy-2,3,3′-trifluoro-4 ′-((pentylcyclohexyl) methoxy) biphenyl (1-1-34) was prepared in the same manner as described in Example 1, and 4′-butoxy- 2 ', 3,3'-trifluorobiphenyl-4-ol (4.44 g) and 1-chloromethyl-4-pentylcyclohexane (3.65 g) were obtained as a white powder (2.0 g). Yield 31%.
- Example 4 4-((4'-Ethoxy-2 ', 3,3'-trifluorobiphenyl-4-yloxy) methyl) -4'-propylbicyclohexane (1-3-8) was prepared according to the method described in Example 1. Similarly, white powder was obtained from 4'-ethoxy-2 ', 3,3'-trifluorobiphenyl-4-ol (2.68 g) and 4-chloromethyl-4'-propylbicyclohexane (3.61 g). As (2.2 g). Yield 45%.
- Example 5 4-((4′-Ethoxy-2 ′, 3,3′-trifluorobiphenyl-4-yloxy) methyl) -4′-pentylbicyclohexane (1-3-29) was prepared according to the method described in Example 1. Similarly, white powder was obtained from 4'-ethoxy-2 ', 3,3'-trifluorobiphenyl-4-ol (2.50 g) and 4-chloromethyl-4'-pentylbicyclohexane (3.99 g). As (4.2 g). Yield 87%.
- Example 6 4-((4′-butoxy-2 ′, 3,3′-trifluorobiphenyl-4-yloxy) methyl) -4′-pentylbicyclohexane (1-3-34) was prepared by the method described in Example 1. Similarly, white powder was obtained from 4'-butoxy-2 ', 3,3'-trifluorobiphenyl-4-ol (4.44 g) and 4-chloromethyl-4'-pentylbicyclohexane (8.73 g). As (2.3 g). Yield 28%.
- Example 7 4-((4′-Ethoxy-2 ′, 3,3′-trifluorobiphenyl-4-yloxy) methyl) -4′-vinylbicyclohexane (1-3-51) was prepared according to the method described in Example 1. Similarly, white powder was obtained from 4'-ethoxy-2 ', 3,3'-trifluorobiphenyl-4-ol (4.02 g) and 4-chloromethyl-4'-vinylbicyclohexane (6.79 g). As (4.5 g). Yield 64%.
- Example 12 3-Chloro-4-ethoxy-2,3′-difluoro-4 ′-((4-propylcyclohexyl) methoxy) biphenyl (1-1-10) was prepared in the same manner as described in Example 1, and 3 ′ From -chloro-4'-ethoxy-2 ', 3-difluorobiphenyl-4-ol (2.85 g) and 4-chloromethyl-4'-propylcyclohexane (1.93 g) as a white powder (2.30 g) Obtained. Yield 54%.
- Example 13 4-((3'-Chloro-4'-ethoxy-2 ', 3-difluorobiphenyl-4-yloxy) methyl) -4'-propylbi (cyclohexane) (1-3-10) is shown in Example 1.
- Example 1 4-((3'-Chloro-4'-ethoxy-2 ', 3-difluorobiphenyl-4-yloxy) methyl) -4'-propylbi (cyclohexane) (1-3-10) is shown in Example 1.
- 3'-chloro-4'-ethoxy-2 ', 3-difluorobiphenyl-4-ol (2.85 g) and 4-chloromethyl-4'-propylbicyclohexane (2.57 g) Obtained as a white powder (3.50 g). Yield 69%.
- the measurement is performed by the following method. First, 15% by weight of the obtained liquid crystal compound and 85% by weight of the mother liquid crystal are mixed to prepare a sample. Then, an extrapolated value is calculated from the measured value of the obtained sample according to the extrapolation method shown in the following equation. This extrapolated value is taken as the physical property value of this compound.
- ⁇ Extrapolated value> (100 ⁇ ⁇ Measured value of sample> ⁇ ⁇ Weight% of mother liquid crystal> ⁇ ⁇ Measured value of mother liquid crystal>) / ⁇ Weight% of liquid crystalline compound> Even when the ratio between the liquid crystal compound and the mother liquid crystal is this ratio, when the smectic phase or crystal precipitates at 25 ° C., the ratio between the liquid crystal compound and the mother liquid crystal is 10% by weight: 90% by weight, 5% by weight: 95% by weight, 1% by weight: 99% by weight.
- the physical properties of the sample were measured with a composition in which the smectic phase or crystals did not precipitate at 25 ° C. An interpolated value is obtained and used as a physical property value of the liquid crystal compound.
- mother liquid crystals A there are various types of mother liquid crystals used for the measurement.
- the composition of the mother liquid crystals A is as follows.
- ⁇ n of this compound is 0.147
- the upper limit temperature (NI) of the nematic phase is 111.3 ° C.
- the viscosity ( ⁇ 20 ) is 106.9 mPa ⁇ s
- the compound of the present application has a larger ⁇ n and a higher NI, It was found to have negatively large ⁇ and small viscosity.
- compositions of the present invention are summarized in [Composition Example 1] to [Composition Example 14].
- compounds that are components of the composition and their amounts (% by weight) are shown.
- the compounds were indicated by the symbols of the left terminal group, linking group, ring structure, and right terminal group according to the conventions in [Table 9].
- the configuration of 1,4-cyclohexylene is trans. If there is no end group symbol, it means that the end group is hydrogen.
- physical property values of the composition are shown.
- the characteristic value can be measured according to the following method. Many of them are the methods described in the Standards of the Electronic Industries Association of Japan (Standard of Industries Industries of Japan) EIAJ / ED-2521A, or modified methods thereof. No TFT was attached to the TN device used for measurement.
- Transition temperature Measured by one of the following methods. 1) A sample was placed on a hot plate (METTLER FP-52 type hot stage) equipped with a polarizing microscope and heated at a rate of 1 ° C./min. The temperature at which the sample changed phase was measured. 2) Measurement was performed at a rate of 3 ° C./minute using a scanning calorimeter DSC-7 system manufactured by PerkinElmer.
- the crystal was represented as C. If a crystal is distinguished into two crystals, it is denoted as C 1 or C 2, respectively.
- the smectic phase was represented as S.
- the crystal was represented as N.
- the liquid (isotropic) was expressed as Iso.
- the nematic phase was represented as N.
- S B phase when a smectic B phase, a smectic C phase or a smectic A phase can be distinguished, they are represented as S B , S C or S A , respectively.
- C 50.0 N 100.0 Iso means that the transition temperature (CN) from the crystal to the nematic phase is 50.0 ° C., and the transition temperature (NI) from the nematic phase to the liquid. Is 100.0 ° C. The same applies to other notations.
- NI Maximum temperature of nematic phase
- a sample was placed on a hot plate of a melting point measuring device equipped with a polarizing microscope and heated at a rate of 1 ° C./min. The temperature was measured when a part of the sample changed from a nematic phase to an isotropic liquid.
- the upper limit temperature of the nematic phase may be abbreviated as “upper limit temperature”.
- T C Minimum temperature of nematic phase
- a sample having a nematic phase is stored in a freezer at 0 ° C., ⁇ 10 ° C., ⁇ 20 ° C., ⁇ 30 ° C., and ⁇ 40 ° C. Observed. For example, it remains of the sample -20 ° C. in a nematic phase, when the change in the -30 ° C. crystals (or a smectic phase), is described as ⁇ -20 ° C.
- the lower limit temperature of the nematic phase may be abbreviated as “lower limit temperature”.
- a mother liquid crystal having a nematic phase was prepared by mixing several compounds having a similar structure.
- a composition in which the compound to be measured and this mother liquid crystal were mixed was obtained.
- An example of the mixing ratio is 15% by weight of the compound and 85% by weight of the mother liquid crystal.
- This composition was stored at a low temperature such as ⁇ 20 ° C. and ⁇ 30 ° C. for 30 days. It was observed whether a part of this composition was changed to a crystal (or smectic phase). The mixing ratio and storage temperature were changed as necessary. From the measurement results, the conditions under which crystals (or smectic phases) precipitate and the conditions under which crystals (or smectic phases) do not precipitate were determined. These conditions are a measure of compatibility.
- Viscosity (bulk viscosity; ⁇ ; measured at 20 ° C .; mPa ⁇ s): An E-type rotational viscometer was used for measurement.
- Viscosity (rotational viscosity; ⁇ 1; measured at 25 ° C .; mPa ⁇ s): The measurement is as described in Imai et al. , Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995). A sample was put in a VA device having a distance (cell gap) between two glass substrates of 20 ⁇ m. A voltage was applied stepwise to this device in the range of 30 to 50 volts every 1 volt. After no application for 0.2 seconds, the application was repeated under the condition of only one rectangular wave (rectangular pulse; 0.2 seconds) and no application (2 seconds). The peak current and peak time of the transient current generated by this application were measured. These measurements and M.I. The value of rotational viscosity was obtained from the paper by Imai et al., Calculation formula (8) on page 40. As the dielectric anisotropy necessary for this calculation, a value measured by the following dielectric anisotropy was used.
- the optical anisotropy was measured by this method.
- the optical anisotropy was measured after mixing the compound with an appropriate composition.
- the optical anisotropy of the compound is an extrapolated value.
- Dielectric Anisotropy ( ⁇ ; measured at 25 ° C.): When the sample was a compound, the compound was mixed with an appropriate composition, and then the dielectric anisotropy was measured. The dielectric anisotropy of the compound is an extrapolated value.
- An ethanol (20 mL) solution of octadecyltriethoxysilane (0.16 mL) was applied to a well-cleaned glass substrate. The glass substrate was rotated with a spinner and then heated at 150 ° C. for 1 hour.
- a VA device having an interval (cell gap) of 20 ⁇ m was assembled from two glass substrates. In the same manner, a polyimide alignment film was prepared on a glass substrate.
- a TN device in which the distance between the two glass substrates was 9 ⁇ m and the twist angle was 80 degrees was assembled.
- a sample (a liquid crystal composition or a mixture of a liquid crystal compound and a mother liquid crystal) is put into the obtained VA element, 0.5 V (1 kHz, sine wave) is applied, and a dielectric constant (in the major axis direction of liquid crystal molecules) ⁇ ) was measured.
- a sample (liquid crystal composition or a mixture of a liquid crystal compound and a mother liquid crystal) is put into the obtained TN device, 0.5 V (1 kHz, sine wave) is applied, and the dielectric in the minor axis direction of the liquid crystal molecules.
- the rate ( ⁇ ) was measured.
- a composition having a negative value is a composition having a negative dielectric anisotropy.
- Threshold voltage (Vth; measured at 25 ° C .; V): When the sample was a compound, the threshold voltage was measured after mixing the compound with an appropriate composition. The threshold voltage of the compound is an extrapolated value.
- a sample was put in a normally black mode liquid crystal display element in which the distance (gap) between the two glass substrates was about 9 ⁇ m and was processed into homeotropic alignment. A rectangular wave having a frequency of 32 Hz was applied to this element. The voltage of the rectangular wave was raised, and the value of the voltage when the transmittance of light passing through the element reached 10% was measured.
- Voltage holding ratio (VHR; measured at 25 ° C .;%):
- the TN device used for the measurement has a polyimide alignment film, and the distance between two glass substrates (cell gap) is 6 ⁇ m. This element was sealed with an adhesive polymerized by ultraviolet rays after putting a sample.
- the TN device was charged by applying a pulse voltage (60 microseconds at 5 V).
- the decaying voltage was measured for 16.7 milliseconds with a high-speed voltmeter, and the area A between the voltage curve and the horizontal axis in a unit cycle was determined.
- the area B is an area when it is not attenuated.
- the voltage holding ratio is a percentage of the area A with respect to the area B.
- the present invention provides a novel liquid crystalline compound having excellent compatibility with other liquid crystal materials, a large ⁇ n value, and a negative large ⁇ .
- the present invention also provides a new liquid crystal composition having the above-mentioned characteristics having desired physical properties by appropriately selecting a ring, a substituent, a bonding group, and the like constituting the compound from the liquid crystal compound as a component. And a liquid crystal display device constituted by using the liquid crystal composition.
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Abstract
Description
(1)化学的な安定性と物理的な安定性を有すること。
(2)高い透明点を有すること。透明点は、液晶相-等方相の転移温度である。
(3)液晶相の低い下限温度を有すること。液晶相は、ネマチック相、スメクチック相などを意味する。
(4)小さな粘度を有すること。
(5)適切な光学異方性を有すること。
(6)適切な負の誘電率異方性を有すること。大きな誘電率異方性を有する化合物は、大きな粘度を有することが多い。
(7)適切な弾性定数K33およびK11(K33:ベンド弾性定数、K11:スプレイ弾性定数)を有すること、および
(8)他の液晶性化合物との相溶性に優れること。
また、(2)、(3)のように、高い透明点、あるいは液晶相の低い下限温度を有する液晶性化合物を含む組成物ではネマチック相の温度範囲を広げることが可能となり、幅広い温度領域で表示素子として使用することが可能となる。
1. 式(1)で表される化合物。
Q1およびQ4はそれぞれ独立して、フッ素または塩素であり;
Q2およびQ3はそれぞれ独立して、水素、フッ素または塩素であり、Q2およびQ3のいずれか一方は必ず水素であり、他方は必ずフッ素または塩素であり;
Zは-CH2O-または-COO-であり;
hは1または2であり、Q1およびQ2はいずれもフッ素であるとき、hは1である。]
3. Q1、Q3およびQ4がフッ素であり、Q2が水素である、項1に記載の化合物。
4.Zが-CH2O-である項1に記載の化合物。
6. 式(2)、(3)および(4)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物を含有する、項5に記載の液晶組成物。
X1は独立してフッ素、塩素、-OCF3、-OCHF2、-CF3、-CHF2、-CH2F、-OCF2CHF2または-OCF2CHFCF3であり;
環A1、環A2および環A3は独立して1,4-シクロヘキシレン、1,3-ジオキサン-2,5-ジイル、ピリミジン-2,5-ジイル、1-ピラン-2,5-ジイルまたは任意の水素がフッ素で置き換えられてもよい1,4-フェニレンであり;
Z1およびZ2は独立して-(CH2)2-、-(CH2)4-、-COO-、-CF2O-、-OCF2-、-CH=CH-、-C≡C-、-CH2O-または単結合であり;
L1およびL2は独立して水素またはフッ素である。]
X2は-C≡Nまたは-C≡C-C≡Nであり;
環B1、環B2および環B3は独立して1,4-シクロヘキシレン、1,3-ジオキサン-2,5-ジイル、1-ピラン-2,5-ジイル、ピリミジン-2,5-ジイル、または任意の水素がフッ素で置き換えられてもよい1,4-フェニレンであり;
Z3は-(CH2)2-、-COO-、-CF2O-、-OCF2-、-C≡C-、-CH2O-または単結合であり;
L3およびL4は独立して水素またはフッ素であり;
qは0、1または2であり、rは0または1であり、q+rは0、1または2である。]
環C1、環C2、環C3および環C4は独立して1,4-シクロヘキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、6-ピラン-2,5-ジイルまたはデカヒドロ-2,6-ナフタレンであり;
Z4、Z5、Z6およびZ7は独立して-(CH2)2-、-COO-、-CH2O-、-OCF2-、-OCF2(CH2)2-または単結合であり;
L5およびL6は独立してフッ素または塩素であり;
j、k、l、m、n、およびpは独立して0または1であり、k+l+m+nは1または2である。]
環D1、環D2および環D3は独立して1,4-シクロヘキシレン、ピリミジン-2,5-ジイル、1,4-フェニレン、2-フルオロ-1,4-フェニレン、3-フルオロ-1,4-フェニレンまたは2,5-ジフルオロ1,4-フェニレンであり;
Z8およびZ9は独立して-C≡C-、-COO-、-(CH2)2-、-CH=CH-または単結合である。]
11. 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、項6に記載の液晶組成物。
12. 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、項7に記載の液晶組成物。
13. 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、項8に記載の液晶組成物。
14. 少なくとも1つの光学活性化合物および/または重合可能な化合物をさらに含有する、項5に記載の液晶組成物。
15. 少なくとも1つの酸化防止剤および/または紫外線吸収剤をさらに含有する、項5に記載の液晶組成物。
16. 項5に記載の液晶組成物を含有する液晶表示素子。
〔液晶性化合物〕
化合物(1)について後述の実施例における[表9]に記載したように、左末端基、結合基、環構造、および右末端基の構造に分けて、各構造について説明する。化合物(1)は2,3,3′位にフッ素または塩素原子を持つビフェニル環を有する三環または四環の化合物である。この化合物は、素子が通常使用される条件下において物理的および化学的に極めて安定であり、そして他の液晶性化合物との相溶性がよい。この化合物を含有する組成物は素子が通常使用される条件下で安定である。この組成物を低い温度で保管しても、この化合物が結晶(またはスメクチック相)として析出することがない。この化合物は、化合物に必要な一般的物性、適切な光学異方性、そして適切な負の誘電率異方性を有する。
化合物(22)にn-ブチルリチウムを、続いて二酸化炭素を反応させてカルボン酸(23)を得る。化合物(23)と、公知の方法で合成されるフェノール(24)とをDDC(1,3-ジシクロヘキシルカルボジイミド)とDMAP(4-ジメチルアミノピリジン)の存在下で脱水させて-COO-を有する化合物(1A)を合成する。
化合物(25)を水素化ホウ素ナトリウムなどの還元剤で還元して化合物(26)を得る。これを塩化チオニルなどでハロゲン化して化合物(27)を得る。炭酸ナトリウムなどの塩基の存在下で、化合物(27)を化合物(24)と反応させて化合物(1B)を合成する。
化合物(1g)と、ビフェニル誘導体(1d)とを炭酸ナトリウムなどの塩基の存在下反応させて本発明の液晶性化合物(1)の一例である液晶性化合物(1h)を製造することができる。
第二に、本発明の組成物をさらに説明する。本発明の液晶組成物は、前記本発明の式(1)で示される化合物を成分Aとして含む必要がある。この成分Aのみの組成物、または成分Aと本明細書中で特に成分名を示していないその他の成分との組成物でもよいが、この成分Aに以下に示す成分B、C、DおよびE成分から選ばれた成分を加えることにより種々の特性を有する本発明の液晶組成物が提供できる。
式(12)、(13)および(14)で表わされる化合物(成分E)の好適例として、それぞれ式(12-1)~(12-11)、(13-1)~(13-19)および(14-1)~(14-6)を挙げることができる。
式(12)で表される化合物は主として粘度調整または屈折率異方性の調整の効果があり、また式(13)および(14)で表される化合物は透明点を高くするなどのネマチックレンジを広げる効果、または屈折率異方性の調整の効果がある。
本発明の液晶組成物の調製は、公知の方法、例えば必要な成分を高温度下で溶解させる方法などにより一般に調製される。また、用途に応じて当業者によく知られている添加物を添加して、例えばつぎに述べるような光学活性化合物、または重合可能な化合物、重合開始剤を含む本発明の液晶組成物、染料を添加したGH型用の液晶組成物を調製することができる。通常、添加物は当該業者によく知られており、文献などに詳細に記載されている。
光学活性化合物として、公知のキラルド-プ剤を添加する。このキラルド-プ剤は液晶のらせん構造を誘起して必要なねじれ角を調整し、逆ねじれを防ぐといった効果を有する。キラルド-プ剤の例として以下の光学活性化合物を挙げることができる。
ベンゾエート系紫外線吸収剤の具体例は、2,4-ジ-t-ブチルフェニル-3,5-ジ-t-ブチル-4-ヒドロキシベンゾエートである。
トリアゾール系紫外線吸収剤の具体例は、2-(2-ヒドロキシ-5-メチルフェニル)ベンゾトリアゾール、2-[2-ヒドロキシ-3-(3,4,5,6-テトラヒドロキシフタルイミド-メチル)-5-メチルフェニル]ベンゾトリアゾール、および2-(3-t-ブチル-2-ヒドロキシ-5-メチルフェニル)-5-クロロベンゾトリアゾールである。
特に、液晶組成物の物性値を変化させずに酸化防止効果が高いという観点からは、下記式で表される酸化防止剤が好ましい。
6-ジ-t-ブチル-4-ドデシルフェノール、2,6-ジ-t-ブチル-4-トリデシルフェノール、2,6-ジ-t-ブチル-4-テトラデシルフェノール、2,6-ジ-t-ブチル-4-ペンタデシルフェノール、2,2’-メチレンビス(6-t-ブチルー4-メチルフェノール)、4,4’-ブチリデンビス(6-t-ブチル-3-メチルフェノール)、2,6-ジ-t-ブチル-4-(2-オクタデシルオキシカルボニル)エチルフェノール、およびペンタエリスリトールテトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]である。
また、本発明に係る液晶組成物では、通常、-5.0~-2.0の範囲の誘電率異方性、好ましくは、-4.5~-2.5の範囲の誘電率異方性を有する液晶組成物を得ることができる。上記数値範囲にある液晶組成物は、IPSモード、VAモード、またはPSAモードで動作する液晶表示素子として好適に使用することができる。
本発明に係る液晶組成物は、PCモード、TNモード、STNモード、OCBモードなどの動作モードを有し、AM方式で駆動する液晶表示素子だけでなく、PCモード、TNモード、STNモード、OCBモード、VAモード、IPSモードまたはPSAモードなどの動作モードを有しパッシブマトリクス(PM)方式で駆動する液晶表示素子にも使用することができる。
また、本発明に係る液晶組成物は、導電剤を添加させた液晶組成物を用いたDS(dynamic scattering)モード素子や、液晶組成物をマイクロカプセル化して作製したNCAP(nematic curvilinear aligned phase)素子や、液晶組成物中に三次元の網目状高分子を形成させたPD(polymer dispersed)素子、例えばPN(polymer network)素子にも使用できる。
以下、実施例により本発明をより詳細に説明する。しかしながら、本発明はこれらの実施例によって制限されない。なお特に断りのない限り、「%」は「重量%」を意味する。得られた化合物は、1H-NMR分析で得られる核磁気共鳴スペクトル、ガスクロマトグラフィー(GC)分析で得られるガスクロマトグラムなどにより同定した。これらによる測定方法は後述する方法に従った。なお、各実施例中において、Cは結晶を、SAはスメクチックA相を、SBはスメクチックB相を、SXは相構造未解析のスメクチック相を、Nはネマチック相を、Iは等方相を示し、相転移温度の単位はすべて℃である。
記録計としては島津製作所製のC-R7A型Chromatopac、またはその同等品を用いた。得られたガスクロマトグラムには、成分化合物に対応するピークの保持時間およびピークの面積値が示されている。
4-エトキシ-2,3,3′-トリフルオロ-4′-((プロピルシクロヘキシル)メトキシ)ビフェニル(1-1-8)を下記に示す合成スキームに従って合成した。
2,3-ジフルオロフェノール(T-1)(195.0g)、ブロモエタン(196.2g)およびテトラブチルアンモニウムブロミド(TBAB)(24.2g)の水(400ml)溶液に、水酸化ナトリウム(75.9g)を加え、窒素雰囲気下80℃で6時間加熱撹拌した。反応終了後ヘプタンにて抽出し、有機層を水および飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して黒色油状物を得た。このものを蒸留にて精製することにより、1-エトキシ-2,3-ジフルオロベンゼン(T-1)を無色油状物として(230.0g)得た。収率97%。
上記操作で得られた化合物(T-2)(129.5g)を乾燥テトラヒドロフラン(以下、DryTHFという)(500ml)に溶解させ、-70℃まで冷却した。窒素雰囲気下n-BuLi(500ml)を滴下し、-70℃で2時間撹拌した。その後ホウ酸トリメチル(129.5g)のDryTHF溶液を-70℃でゆっくりと滴下し、室温まで昇温して16時間撹拌した。反応終了後2N-HCl(200ml)を加えた後、トルエンにて抽出し、水、飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものを再結晶(容量比で、ヘプタン:トルエン=4:1)することにより、(T-3)を白色粉末として(117.2g)得た。収率71%。
上記操作で得られた化合物(T-3)(88.8g)、4-ブロモ-2-フルオロフェノール(T-4)(76.4g)、炭酸ナトリウム(50.8g)およびPd-C(NXタイプ)(0.21g)をソルミックス (400ml)に溶解させ、窒素雰囲気下6時間加熱還流した。反応終了後セライトろ過し、ろ液をトルエンにて抽出した。有機層を2N水酸化ナトリウム水溶液、飽和炭酸水素ナトリウム水溶液、水および飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものを再結晶(容量比で、ヘプタン:トルエン=4:1)することにより、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(T-5)を白色粉末として(72.0g)得た。収率67%。
上記操作で得られた化合物(T-5)(4.02g)、1-クロロメチル-4-プロピルシクロヘキサン(T-6)(3.15g)、をDMF(100ml)に溶解させ、炭酸ナトリウム(2.39g)を加え、窒素雰囲気下80℃で3時間加熱撹拌した。反応終了後トルエンにて抽出し、有機層を飽和炭酸水素ナトリウム水溶液、水、飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものをシリカゲルカラムクロマトグラフィー(容量比で、ヘプタン:酢酸エチル=20:1)、及び再結晶(容量比で、ヘプタン:エタノール=1:1)することにより、表題化合物(1-1-8)を白色粉末として(4.7g)得た。収率77%。
4-エトキシ-2,3,3′-トリフルオロ-4′-((ペンチルシクロヘキシル)メトキシ)ビフェニル(1-1-29)を実施例1に示した方法と同様にして、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(3.00g)および1-クロロメチル-4-ペンチルシクロヘキサン(2.95g)より、白色粉末として(3.66g)得た。収率62%。
4-ブトキシ-2,3,3′-トリフルオロ-4′-((ペンチルシクロヘキシル)メトキシ)ビフェニル(1-1-34)を実施例1に示した方法と同様にして、4′-ブトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(4.44g)および1-クロロメチル-4-ペンチルシクロヘキサン(3.65g)より、白色粉末として(2.0g)得た。収率31%。
4-((4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-プロピルビシクロヘキサン(1-3-8)を実施例1に示した方法と同様にして、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(2.68g)および4-クロロメチル-4′-プロピルビシクロヘキサン(3.61g)より、白色粉末として(2.2g)得た。収率45%。
4-((4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-ペンチルビシクロヘキサン(1-3-29)を実施例1に示した方法と同様にして、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(2.50g)および4-クロロメチル-4′-ペンチルビシクロヘキサン(3.99g)より、白色粉末として(4.2g)得た。収率87%。
4-((4′-ブトキシ-2′,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-ペンチルビシクロヘキサン(1-3-34)を実施例1に示した方法と同様にして、4′-ブトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(4.44g)および4-クロロメチル-4′-ペンチルビシクロヘキサン(8.73g)より、白色粉末として(2.3g)得た。収率28%。
4-((4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-ビニルビシクロヘキサン(1-3-51)を実施例1に示した方法と同様にして、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(4.02g)および4-クロロメチル-4′-ビニルビシクロヘキサン(6.79g)より、白色粉末として(4.5g)得た。収率64%。
4′-ブトキシ-2,3,3′-トリフルオロ-4-((プロピルシクロヘキシル)メトキシ)ビフェニル(1-2-13)を下記に示す合成スキームに従って合成した。
4-ブロモ-2-フルオロフェノール(T-7)(76.4g)、ブロモブタン(65.8g)およびテトラブチルアンモニウムブロミド(TBAB)(6.44g)の水(400ml)溶液に、水酸化ナトリウム(20.2g)を加え、窒素雰囲気下80℃で6時間加熱撹拌した。反応終了後ヘプタンにて抽出し、有機層を水および飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して黒色油状物を得た。このものを蒸留にて精製することにより、4-ブロモ-1-ブトキシ-2-フルオロベンゼン(T-8)を無色油状物として(97.5g)得た。収率98%。
上記操作で得られた化合物(T-8)(97.5g)をDryTHF(500ml)に溶解させ、-70℃まで冷却した。窒素雰囲気下n-BuLi(241ml)を滴下し、-70℃で2時間撹拌した。その後ホウ酸トリメチル(62.4g)のDryTHF溶液を-70℃でゆっくりと滴下し、室温まで昇温して16時間撹拌した。反応終了後2N-HCl(200ml)を加えた後、トルエンにて抽出し、水、飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものを再結晶(容量比で、ヘプタン:トルエン=4:1)することにより、(T-9)を白色粉末として(54.8g)得た。収率66%。
上記操作で得られた化合物(T-9)(30.0g)、4-ブロモ-2,3-ジフルオロフェノール(T-10)(26.9g)、炭酸ナトリウム(37.5g)およびPd-C(NXタイプ)(0.11g)をソルミックス (300ml)に溶解させ、窒素雰囲気下6時間加熱還流した。反応終了後セライトろ過し、ろ液をトルエンにて抽出した。有機層を2N水酸化ナトリウム水溶液、飽和炭酸水素ナトリウム水溶液、水および飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものを再結晶(容量比で、ヘプタン:トルエン=4:1)することにより、4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-オール(T-11)を白色粉末として(24.1g)得た。収率56%。
上記操作で得られた化合物(T-11)(2.50g)、1-クロロメチル-4-プロピルシクロヘキサン(T-6)(2.22g)、をDMF(100ml)に溶解させ、炭酸ナトリウム(1.75g)を加え、窒素雰囲気下80℃で3時間加熱撹拌した。反応終了後トルエンにて抽出し、有機層を飽和炭酸水素ナトリウム水溶液、水、飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものをシリカゲルカラムクロマトグラフィー(容量比で、ヘプタン:酢酸エチル=20:1)、及び再結晶(容量比で、ヘプタン:エタノール=1:1)することにより、表題化合物(1-2-13)を白色粉末として(3.0g)得た。収率82%。
4-((4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-プロピルビシクロヘキサン(1-4-13)を実施例8に示した方法と同様にして、4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-オール(2.00g)および4-クロロメチル-4′-プロピルビシクロヘキサン(2.64g)より、白色粉末として(2.9g)得た。収率83%。
4-((4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-イルオキシ)メチル)-4′-ビニルビシクロヘキサン(1-4-55)を実施例8に示した方法と同様にして、4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-オール(2.67g)および4-クロロメチル-4′-ビニルビシクロヘキサン(3.39g)より、白色粉末として(3.2g)得た。収率71%。
4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-イル 4′-プロピルビシクロヘキサン-4-カルボキシレート(1-4-14)を下記に示す合成スキームに従って合成した。
実施例8で合成した4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-オール(T-11)(2.00g)、ジシクロヘキシルカルボジイミド(DCC)(1.46g)およびジメチルアミノピリジン(DMAP)(0.08g)をトルエン(100ml)に溶解させ、4′-プロピルビシクロヘキサン-4-カルボン酸(1.70g)を加え、室温で16時間撹拌した。反応終了後ろ過し、ろ液をトルエンにて抽出した。有機層を1N-HCl水溶液、1N-水酸化ナトリウム水溶液、飽和炭酸水素ナトリウム水溶液、水および飽和塩化ナトリウム水溶液にて洗浄した後、無水硫酸マグネシウムで乾燥し、減圧濃縮して淡茶色固体を得た。このものをシリカゲルカラムクロマトグラフィー(容量比で、ヘプタン:酢酸エチル=20:1)、及び再結晶(容量比で、ヘプタン:トルエン=4:1)することにより、4′-ブトキシ-2,3,3′-トリフルオロビフェニル-4-イル 4′-プロピルビシクロヘキサン-4-カルボキシレート(1-8-14)を白色粉末として(2.39g)得た。収率67%。
3-クロロ-4-エトキシ-2,3′-ジフルオロ-4′-((4-プロピルシクロヘキシル)メトキシ)ビフェニル(1-1-10)を実施例1に示した方法と同様にして、3′-クロロ-4′-エトキシ-2′,3-ジフルオロビフェニル-4-オール(2.85g)および4-クロロメチル-4′-プロピルシクロヘキサン(1.93g)より、白色粉末として(2.30g)得た。収率54%。
4-((3′-クロロ-4′-エトキシ-2′,3-ジフルオロビフェニル-4-イルオキシ)メチル)-4′-プロピルビ(シクロヘキサン)(1-3-10)を実施例1に示した方法と同様にして、3′-クロロ-4′-エトキシ-2′,3-ジフルオロビフェニル-4-オール(2.85g)および4-クロロメチル-4′-プロピルビシクロヘキサン(2.57g)より、白色粉末として(3.50g)得た。収率69%。
4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-イル 4-プロピルシクロヘキサンカルボキシレート(1-1-9)を実施例11に示した方法と同様にして、4′-エトキシ-2′,3,3′-トリフルオロビフェニル-4-オール(T-5)(5.36g)、ジシクロヘキシルカルボジイミド(DCC)(4.53g)、ジメチルアミノピリジン(DMAP)(0.244g)および4′-プロピルシクロヘキサン-4-カルボン酸(5.10g)より、白色粉末として(2.70g)得た。収率32%。
液晶性化合物と母液晶との割合がこの割合であっても、スメクチック相、または結晶が25℃で析出する場合には、液晶性化合物と母液晶との割合を10重量%:90重量%、5重量%:95重量%、1重量%:99重量%の順に変更をしていき、スメクチック相、または結晶が25℃で析出しなくなった組成で試料の物性値を測定し上記式にしたがって外挿値を求めて、これを液晶性化合物の物性値とする。
母液晶A:
4-(4-エトキシ-2,3-ジフルオロ-フェニル)-4′-プロピル-ビシクロヘキシル(s-1)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.114、Δεは-5.81となり、本願化合物の方が大きなΔnおよび負に大きなΔεを有することが分かった。
4-(4-エトキシ-2,3-ジフルオロ-フェニル)-4′-ビニル-ビシクロヘキシル(s-2)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.120、Δεは-5.79となり、本願化合物の方が大きなΔnおよび負に大きなΔεを有することが分かった。
2,2′,3,3′-テトラフルオロ-4,4′-ビス(オクチルオキシ)ビフェニル(s-3)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.120、ネマチック相の上限温度(NI)は9.3℃となり、本願化合物の方が大きなΔnと高いNIを有することが分かった。また、この化合物の相転移温度はC 52.2℃ Iであり液晶相を示さなかった。
2,3,3′-トリフルオロ-4,4′-ビス(オクチルオキシ)ビフェニル(s-4)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.132、ネマチック相の上限温度(NI)は21.9℃となり、本願化合物の方が大きなΔnと高いNIを有することが分かった。また、この化合物の相転移温度はC 40.2℃ Iであり液晶相を示さなかった。
2,2′,3′-トリフルオロ-4,4′-ビス(オクチルオキシ)ビフェニル(s-5)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.135、Δεは-4.51、ネマチック相の上限温度(NI)は10.6℃となり、本願化合物の方が大きなΔnと高いNIおよび負に大きなΔεを有することが分かった。また、この化合物の相転移温度はC 45.7℃ Iであり液晶相を示さなかった。
4-エトキシ-2,2′,3,3′-テトラフルオロ-4′-((4-プロピルシクロヘキシル)メトキシ)ビフェニル(s-6)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.147、ネマチック相の上限温度(NI)は111.3℃、粘度(η20)は106.9mPa・sとなり、本願化合物の方が大きなΔnと高いNI、負に大きなΔεおよび小さな粘度を有することが分かった。
4-メトキシ-2,2′,3-トリフルオロ-4′-((4-プロピルシクロヘキシル)メトキシ)ビフェニル(s-7)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔεは-3.65、ネマチック相の上限温度(NI)は112.6℃、粘度(η20)は100.3mPa・sとなり、本願化合物の方が高いNIおよび負に大きなΔεを有することが分かった。
4-エトキシ-2,3,-ジフルオロ-4′-(2-(4-プロピルシクロヘキシル)エチル)ビフェニル(s-8)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.145、ネマチック相の上限温度(NI)は110.6℃となり、本願化合物の方が大きなΔnおよび高いNIを有することが分かった。
4′-(ジフルオロ(4-プロピルシクロヘキシル)メトキシ)-4-エトキシ-2,3,3′-トリフルオロビフェニル(s-9)を合成し、この化合物の15重量%と母液晶Aの85重量%とからなる組成物を調製し、[実施例1]と同様にして物性値を測定した。その結果、この化合物のΔnは0.127、Δεは-4.33、ネマチック相の上限温度(NI)は111.6℃となり、本願化合物の方が大きなΔnと高いNIおよび負に大きなΔεを有することが分かった。
測定はM. Imai et al., Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995) に記載された方法に従った。2枚のガラス基板の間隔(セルギャップ)が20μmのVA素子に試料を入れた。この素子に30ボルト~50ボルトの範囲で1ボルト毎に段階的に印加した。0.2秒の無印加のあと、ただ1つの矩形波(矩形パルス;0.2秒)と無印加(2秒)の条件で印加を繰り返した。この印加によって発生した過渡電流(transient current)のピーク電流(peak current)とピーク時間(peak time)を測定した。これらの測定値とM. Imaiらの論文、40頁の計算式(8)とから回転粘度の値を得た。この計算に必要な誘電率異方性は、下記の誘電率異方性で測定した値を用いた。
よく洗浄したガラス基板にオクタデシルトリエトキシシラン(0.16mL)のエタノール(20mL)溶液を塗布した。ガラス基板をスピンナーで回転させたあと、150℃で1時間加熱した。2枚のガラス基板から、間隔(セルギャップ)が20μmであるVA素子を組み立てた。
同様の方法で、ガラス基板にポリイミドの配向膜を調製した。得られたガラス基板の配向膜にラビング処理をした後、2枚のガラス基板の間隔が9μmであり、ツイスト角が80度であるTN素子を組み立てた。
得られたVA素子に試料(液晶組成物、または液晶性化合物と母液晶との混合物)を入れ、0.5V(1kHz、サイン波)を印加して、液晶分子の長軸方向における誘電率(ε∥)を測定した。
また、得られたTN素子に試料(液晶組成物、または液晶性化合物と母液晶との混合物)を入れ、0.5V(1kHz、サイン波)を印加して、液晶分子の短軸方向における誘電率(ε⊥)を測定した。
誘電率異方性の値は、Δε=ε∥-ε⊥の式から計算した。
この値が負である組成物が、負の誘電率異方性を有する組成物である。
2枚のガラス基板の間隔(ギャップ)が約9μmであり、ホメオトロピック配向に処理したノーマリーブラックモード(normally black mode)の液晶表示素子に試料を入れた。この素子に周波数が32Hzである矩形波を印加した。矩形波の電圧を上昇させ、素子を通過する光の透過率10%になったときの電圧の値を測定した。
3-H1OB(2F,3F)B(F)-O4 (1-2-13) 4%
V-HH1OB(2F,3F)B(F)-O4 (1-4-55) 4%
3-HHEB(2F,3F)B(F)-O4 (1-4-14) 5%
5-HH-O1 (12-1) 4%
3-HH-4 (12-1) 5%
3-HB(2F,3F)-O2 (6-1)16%
5-HB(2F,3F)-O2 (6-1)21%
3-HHB(2F,3F)-1 (7-1) 7%
3-HHB(2F,3F)-O2 (7-1)14%
5-HHB(2F,3F)-O2 (7-1)20%
NI=82.3℃;Δn=0.093;η=32.6mPa・s;Δε=-4.8.
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 5%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 3%
3-HH1OB(2F)B(2F,3F)-O2 (1-3-8) 3%
3-HB-O1 (12-5)15%
3-HH-4 (12-1) 5%
3-HB(2F,3F)-O2 (6-1)12%
5-HB(2F,3F)-O2 (6-1)12%
2-HHB(2F,3F)-1 (7-1)12%
3-HHB(2F,3F)-1 (7-1) 7%
3-HHB(2F,3F)-O2 (7-1)13%
5-HHB(2F,3F)-O2 (7-1)13%
NI=87.7℃;Δn=0.097;Δε=-4.0.
5-HH1OB(2F)B(2F,3F)-O2 (1-3-29) 3%
5-HH1OB(2F)B(2F,3F)-O4 (1-3-34) 3%
V-HH1OB(2F)B(2F,3F)-O2 (1-3-51) 3%
3-HB-O1 (12-5)15%
3-HH-4 (12-1) 5%
3-HB(2F,3F)-O2 (6-1)12%
5-HB(2F,3F)-O2 (6-1)12%
2-HHB(2F,3F)-1 (7-1)12%
3-HHB(2F,3F)-1 (7-1) 3%
3-HHB(2F,3F)-O2 (7-1)13%
5-HHB(2F,3F)-O2 (7-1)13%
6-HEB(2F,3F)-O2 (6-6) 6%
NI=89.8℃;Δn=0.095;η=39.3mPa・s;Δε=-4.0.
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 3%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 3%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8) 3%
3-HH-4 (12-1) 8%
3-H2B(2F,3F)-O2 (6-4)22%
5-H2B(2F,3F)-O2 (6-4)22%
3-HHB(2F,3Cl)-O2 (7-12) 3%
5-HHB(2F,3Cl)-O2 (7-12) 2%
3-HBB(2F,3F)-O2 (7-7) 9%
5-HBB(2F,3F)-O2 (7-7) 4%
V-HHB-1 (13-1) 6%
3-HHB-3 (13-1) 6%
3-HHEBH-3 (14-6) 3%
3-HHEBH-4 (14-6) 3%
3-HHEBH-5 (14-6) 3%
NI=89.5℃;Δn=0.102;η=31.8mPa・s;Δε=-4.1.
3-HH1OB(2F,3F)B(F)-O4 (1-4-13) 3%
V-HH1OB(2F,3F)B(F)-O4 (1-4-55) 3%
3-HHEB(2F,3F)B(F)-O4 (1-4-14) 3%
2-HH-5 (12-1) 3%
3-HH-4 (12-1)15%
3-HH-5 (12-1) 4%
3-H2B(2F,3F)-O2 (6-4)15%
5-H2B(2F,3F)-O2 (6-4)15%
3-HHB(2F,3Cl)-O2 (7-12) 5%
3-HBB(2F,3F)-O2 (7-7) 9%
5-HBB(2F,3F)-O2 (7-7) 9%
3-HHB-3 (13-1) 4%
3-HB-O2 (12-5)12%
NI=81.6℃;Δn=0.097;η=24.5mPa・s;Δε=-4.4.
上記組成物100部に(Op-05)を0.25部添加したときのピッチは61.3μmであった。
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 5%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 5%
2-BEB(F)-C (5-14) 5%
3-BEB(F)-C (5-14) 4%
4-BEB(F)-C (5-14)12%
1V2-BEB(F,F)-C (5-15) 9%
3-HB-O2 (12-5) 8%
3-HH-4 (12-1) 5%
3-HHB-F (3-1) 3%
3-HHB-1 (13-1) 8%
3-HHB-O1 (13-1) 4%
3-HBEB-F (3-37) 4%
3-HHEB-F (3-10) 6%
5-HHEB-F (3-10) 5%
3-H2BTB-2 (13-17) 4%
3-H2BTB-3 (13-17) 4%
3-H2BTB-4 (13-17) 4%
3-HB(F)TB-2 (13-18) 5%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8) 8%
2-HB-C (5-1) 5%
3-HB-C (5-1)12%
3-HB-O2 (12-5)15%
2-BTB-1 (12-10) 3%
3-HHB-F (3-1) 4%
3-HHB-1 (13-1) 8%
3-HHB-O1 (13-1) 5%
3-HHB-3 (13-1)14%
3-HHEB-F (3-10) 4%
5-HHEB-F (3-10) 4%
2-HHB(F)-F (3-2) 4%
3-HHB(F)-F (3-2) 4%
5-HHB(F)-F (3-2) 5%
3-HHB(F,F)-F (3-3) 5%
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 7%
5-HB-CL (2-2)16%
3-HH-4 (12-1)12%
3-HH-5 (12-1) 4%
3-HHB-F (3-1) 4%
3-HHB-CL (3-1) 3%
4-HHB-CL (3-1) 4%
3-HHB(F)-F (3-2) 8%
4-HHB(F)-F (3-2) 7%
5-HHB(F)-F (3-2) 7%
7-HHB(F)-F (3-2) 7%
5-HBB(F)-F (3-23) 4%
1O1-HBBH-5 (14-1) 3%
3-HHBB(F,F)-F (4-6) 2%
4-HHBB(F,F)-F (4-6) 3%
5-HHBB(F,F)-F (4-6) 3%
3-HH2BB(F,F)-F (4-15) 3%
4-HH2BB(F,F)-F (4-15) 3%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8) 5%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 6%
3-HHB(F,F)-F (3-3) 9%
3-H2HB(F,F)-F (3-15) 8%
4-H2HB(F,F)-F (3-15) 8%
5-H2HB(F,F)-F (3-15) 8%
3-HBB(F,F)-F (3-24)20%
5-HBB(F,F)-F (3-24)15%
3-H2BB(F,F)-F (3-27) 5%
5-HHBB(F,F)-F (4-6) 3%
5-HHEBB-F (4-17) 3%
3-HH2BB(F,F)-F (4-15) 2%
1O1-HBBH-4 (14-1) 4%
1O1-HBBH-5 (14-1) 4%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8)12%
5-HB-CL (2-2)11%
3-HH-4 (12-1) 8%
3-HHB-1 (13-1) 5%
3-HHB(F,F)-F (3-3) 8%
3-HBB(F,F)-F (3-24)13%
5-HBB(F,F)-F (3-24)10%
3-HHEB(F,F)-F (3-12)10%
4-HHEB(F,F)-F (3-12) 3%
5-HHEB(F,F)-F (3-12) 3%
2-HBEB(F,F)-F (3-39) 3%
3-HBEB(F,F)-F (3-39) 5%
5-HBEB(F,F)-F (3-39) 3%
3-HHBB(F,F)-F (4-6) 6%
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 4%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 4%
3-HB-CL (2-2) 6%
5-HB-CL (2-2) 4%
3-HHB-OCF3 (3-1) 5%
3-H2HB-OCF3 (3-13) 5%
5-H4HB-OCF3 (3-19)14%
V-HHB(F)-F (3-2) 5%
3-HHB(F)-F (3-2) 5%
5-HHB(F)-F (3-2) 5%
3-H4HB(F,F)-CF3 (3-21) 8%
5-H4HB(F,F)-CF3 (3-21)10%
5-H2HB(F,F)-F (3-15) 5%
5-H4HB(F,F)-F (3-21) 7%
2-H2BB(F)-F (3-26) 3%
3-H2BB(F)-F (3-26) 5%
3-HBEB(F,F)-F (3-39) 5%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8) 8%
5-HB-CL (2-2) 3%
7-HB(F)-F (2-3) 7%
3-HH-4 (12-1) 9%
3-HH-EMe (12-2)15%
3-HHEB-F (3-10) 8%
5-HHEB-F (3-10) 8%
3-HHEB(F,F)-F (3-12)10%
4-HHEB(F,F)-F (3-12) 5%
4-HGB(F,F)-F (3-103) 5%
5-HGB(F,F)-F (3-103) 6%
2-H2GB(F,F)-F (3-106) 4%
3-H2GB(F,F)-F (3-106) 5%
5-GHB(F,F)-F (3-109) 7%
5-H1OB(2F)B(2F,3F)-O2 (1-1-29) 5%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 5%
3-HH-4 (12-1) 8%
3-HHB-1 (13-1) 6%
3-HHB(F,F)-F (3-3) 10%
3-H2HB(F,F)-F (3-15) 9%
3-HBB(F,F)-F (3-24)15%
3-BB(F,F)XB(F,F)-F (3-97)25%
1O1-HBBH-5 (14-1) 7%
2-HHBB(F,F)-F (4-6) 3%
3-HHBB(F,F)-F (4-6) 3%
3-HH2BB(F,F)-F (4-15) 4%
3-H1OB(2F)B(2F,3F)-O2 (1-1-8) 3%
5-H1OB(2F)B(2F,3F)-O4 (1-1-34) 5%
3-HB―CL (2-2)13%
3-HB-O2 (12-5)10%
3-PyB(F)-F (2-15)10%
5-PyB(F)-F (2-15)10%
3-HBB(F,F)-F (3-24) 7%
3-PyBB-F (3-80) 8%
3-PyBB-F (3-80) 7%
3-PyBB-F (3-80) 7%
5-HBB(F)B-2 (14-5)10%
5-HBB(F)B-3 (14-5)10%
また、本発明は、この液晶性化合物を成分として、その化合物を構成する環、置換基、結合基などを適当に選択することにより、所望の物性を有する上記の特徴を備えた新たな液晶組成物を提供し、さらにこの液晶組成物を用いて構成した液晶表示素子を提供する。
Claims (16)
- Q1、Q2およびQ4がフッ素であり、Q3が水素である、請求項1に記載の化合物。
- Q1、Q3およびQ4がフッ素であり、Q2が水素である、請求項1に記載の化合物。
- Zが-CH2O-である請求項1に記載の化合物。
- 請求項1に記載の化合物を少なくとも1つ含有することを特徴とする、2つ以上の化合物からなる液晶組成物。
- 式(2)、(3)および(4)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物を含有する、請求項5に記載の液晶組成物。
[式中、R3は独立して炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、アルキルおよびアルケニルにおいて任意の水素はフッ素で置き換えられてもよく、任意の-CH2-は-O-で置き換えられてもよく;
X1は独立してフッ素、塩素、-OCF3、-OCHF2、-CF3、-CHF2、-CH2F、-OCF2CHF2または-OCF2CHFCF3であり;
環A1、環A2および環A3は独立して1,4-シクロヘキシレン、1,3-ジオキサン-2,5-ジイル、ピリミジン-2,5-ジイル、1-ピラン-2,5-ジイルまたは任意の水素がフッ素で置き換えられてもよい1,4-フェニレンであり;
Z1およびZ2は独立して-(CH2)2-、-(CH2)4-、-COO-、-CF2O-、-OCF2-、-CH=CH-、-C≡C-、-CH2O-または単結合であり;
L1およびL2は独立して水素またはフッ素である。] - 式(5)で表される化合物の群から選択される少なくとも1つの化合物を含有する、請求項5に記載の液晶組成物。
[式中、R4は炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、アルキルおよびアルケニルにおいて任意の水素はフッ素で置き換えられてもよく、任意の-CH2-は-O-で置き換えられてもよく;
X2は-C≡Nまたは-C≡C-C≡Nであり;
環B1、環B2および環B3は独立して1,4-シクロヘキシレン、1,3-ジオキサン-2,5-ジイル、1-ピラン-2,5-ジイル、ピリミジン-2,5-ジイル、または任意の水素がフッ素で置き換えられてもよい1,4-フェニレンであり;
Z3は-(CH2)2-、-COO-、-CF2O-、-OCF2-、-C≡C-、-CH2O-または単結合であり;
L3およびL4は独立して水素またはフッ素であり;
qは0、1または2であり、rは0または1であり、q+rは0、1または2である。] - 式(6)、(7)、(8)、(9)、(10)および(11)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物を含有する、請求項5に記載の液晶組成物。
[式中、R5およびR6は独立して炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、アルキルおよびアルケニルにおいて任意の水素はフッ素で置き換えられてもよく、任意の-CH2-は-O-で置き換えられてもよく;
環C1、環C2、環C3および環C4は独立して1,4-シクロヘキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、6-ピラン-2,5-ジイルまたはデカヒドロ-2,6-ナフタレンであり;
Z4、Z5、Z6およびZ7は独立して-(CH2)2-、-COO-、-CH2O-、-OCF2-、-OCF2(CH2)2-または単結合であり;
L5およびL6は独立してフッ素または塩素であり;
j、k、l、m、n、およびpは独立して0または1であり、k+l+m+nは1または2である。] - 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物を含有する、請求項5に記載の液晶組成物。
[式中、R7およびR8は独立して炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて任意の-CH2-は-O-で置き換えられてもよく;
環D1、環D2および環D3は独立して1,4-シクロヘキシレン、ピリミジン-2,5-ジイル、1,4-フェニレン、2-フルオロ-1,4-フェニレン、3-フルオロ-1,4-フェニレンまたは2,5-ジフルオロ1,4-フェニレンであり;
Z8およびZ9は独立して-C≡C-、-COO-、-(CH2)2-、-CH=CH-または単結合である。] - 式(5)で表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項6に記載の液晶組成物。
- 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項6に記載の液晶組成物。
- 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項7に記載の液晶組成物。
- 式(12)、(13)および(14)のそれぞれで表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項8に記載の液晶組成物。
- 少なくとも1つの光学活性化合物および/または重合可能な化合物をさらに含有する、請求項5に記載の液晶組成物。
- 少なくとも1つの酸化防止剤および/または紫外線吸収剤をさらに含有する、請求項5に記載の液晶組成物。
- 請求項5に記載の液晶組成物を含有する液晶表示素子。
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Also Published As
Publication number | Publication date |
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US8298632B2 (en) | 2012-10-30 |
CN102307838B (zh) | 2015-03-11 |
US20110272630A1 (en) | 2011-11-10 |
JP5526762B2 (ja) | 2014-06-18 |
EP2399896A4 (en) | 2014-10-22 |
KR101688670B1 (ko) | 2016-12-21 |
TW201037062A (en) | 2010-10-16 |
EP2399896A1 (en) | 2011-12-28 |
TWI460255B (zh) | 2014-11-11 |
CN102307838A (zh) | 2012-01-04 |
KR20110116175A (ko) | 2011-10-25 |
JP2010215609A (ja) | 2010-09-30 |
EP2399896B1 (en) | 2016-04-13 |
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