23 results about "Discotic liquid crystal" patented technology

The invention discloses a topological chemical polymerization method based on discotic liquid crystals, and relates to the technical field of liquid crystal polymers. The method comprises the following steps: dissolving 3, 4, 5-tri (hexyloxy) phenylacetonitrile and 1, 3, 5-benzenetricarboxaldehyde in ethanol, adding tetrabutyl ammonium hydroxide, and reacting at 50-60 DEG C for 1-3 hours to obtain a discotic liquid crystal monomer; placing the discotic liquid crystal monomer on a substrate, heating the discotic liquid crystal monomer until the temperature is greater than or equal to 200 DEG C to enable the discotic liquid crystal monomer to be in a molten state, then pressing the discotic liquid crystal monomer to form a thin film, then cooling the discotic liquid crystal monomer to 70-80 DEG C, and then irradiating the thin film sample for 12-48 hours by using ultraviolet light to obtain the one-dimensional polymer material based on the topological chemical polymerization of the discotic liquid crystal. According to the method, the application range of topological chemical polymerization is widened, more adjustability is given to the topological chemical polymerization process, and new possibility is provided for the field of topological chemistry.

The present invention addresses the problem of providing an optical filter and an optical system using a liquid crystal polarization interference element which, when used for a band-pass filter or the like, can inhibit fluctuation in the wavelength of light exhibiting a maximum transmittance even when the light is incident from an oblique direction. The problem is solved by the configuration in which the liquid crystal polarization interference element includes two or more sets each made up of a first liquid crystal layer and a second liquid crystal layer, the first liquid crystal layer and the second liquid crystal layer including a liquid crystal layer R obtained by fixing a horizontally arrayed rod-shaped liquid crystal compound and a liquid crystal layer D obtained by fixing a vertically arrayed discoid liquid crystal compound. The liquid crystal layer R and the liquid crystal layer D have parallel slow axes and equal in-plane retardation. Furthermore, the in-plane slow axes of the first liquid crystal layer and the second liquid crystal layer intersect each other.

An optical laminate including an adhesive layer, a light interference layer, and two or more laminated reflective layers in this order, in which the laminated reflective layer includes one reflective layer A that includes one or more cholesteric liquid crystal layers consisting of a rod-like liquid crystal, and one reflective layer B that includes one or more cholesteric liquid crystal layers consisting of a disk-like liquid crystal, in a case where the reflective layers A face each other or the reflective layers B face each other in adjacent laminated reflective layers, reflection center wavelengths of the adjacent reflective layers are different from each other.

The present invention relates to a highly conjugated photocurable discotic liquid crystal monomer based on benzotrithiophene-bridged carbazole and its application in 4D printing intelligent manufacturing, belonging to the technical field of liquid crystal materials. The structural general formula is as shown in Formula (I). In the present invention, carbazole and thiophene groups with good optoelectronic response are introduced into the photocurable liquid crystal molecular system to replace the low-conjugated phenyl structure bridged by traditional ester bonds, which not only realizes a lower driving voltage for 4D printing structures, but also the position of carbazole-NH is convenient for introducing flexible side chains, further realizing the regulation of the phase transition temperature of liquid crystal materials.

The present invention addresses the problem of providing an optical element which is capable of diffracting incident light with high diffraction efficiency. The problem is solved by an optical element which has a first optically anisotropic layer that contains a calamitic liquid crystal compound and a second optically anisotropic layer that contains a discotic liquid crystal compound, wherein the first optically anisotropic layer and the second optically anisotropic layer have a first liquid crystal alignment pattern in which the orientation of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one direction, and have a region in which the orientation of the optical axis rotates by 180° with a period that is shorter than 0.5 μm.

The invention relates to ink and a light-emitting device. The ink comprises a solvent, and an organic luminescent material and a discotic liquid crystal material which are dispersed in the solvent. According to the ink, the wettability of the ink on the surface of a substrate can be improved by adding the discotic liquid crystal material, the substrate can be more uniformly coated with the ink, the uniformity of a thin film is enhanced, and the discotic liquid crystal material has self-assembly capacity and can promote molecular arrangement and accumulation in the thin film forming process, so that the compactness and quality of the thin film are improved.

The present invention addresses the problem of providing an optical filter using a liquid crystal polarization interference element capable of suppressing variation in the wavelength at which maximum transmittance of light is exhibited even when the light is incident from an oblique direction, and to provide an optical system using the optical filter. The above problem is solved by a configuration in which a liquid crystal polarization interference element has two or more sets comprising a first liquid crystal layer and a second liquid crystal layer, the first liquid crystal layer and the second liquid crystal layer including a liquid crystal layer R in which a horizontally aligned rod-shaped liquid crystal compound is fixed and a liquid crystal layer D in which a vertically aligned discoid liquid crystal compound is fixed, the liquid crystal layer R and the liquid crystal layer D having parallel slow axes and equal in-plane retardation, and the in-plane slow axes of the first liquid crystal layer and the second liquid crystal layer intersecting.

The invention discloses a near-infrared light-emitting disc-shaped liquid crystal compound as well as a preparation method and application thereof, and the compound has the structural self-healing property and near-infrared light-emitting property of liquid crystal molecules and can be applied to the field of anti-counterfeiting display. After a substrate is coated with the compound, under the irradiation of external light, the compound can be detected to emit light only under a near-infrared laser sensor, so that the anti-counterfeiting complexity is remarkably increased. In addition, the compound also has light modulation capability, can change the luminescence characteristic under the action of an external field, and further improves the anti-counterfeiting effect. Meanwhile, the preparation method is simple and efficient, the used raw materials are low in price and easy to obtain, reaction conditions are mild and safe, the product purification process is simple and convenient, and the method is suitable for industrial production.

This invention relates to the field of organic photovoltaic (PV) device technology, specifically to an organic PV device based on disk-shaped liquid crystal molecules, its fabrication method, and its applications. The organic PV device based on disk-shaped liquid crystal molecules provided by this invention comprises an anode substrate, a hole transport layer, an active layer, an electron transport layer, and a metal cathode stacked sequentially. The active layer is composed of a donor material, an acceptor material, and a benzo[a]phenanthrene disk-shaped liquid crystal derivative. The benzo[a]phenanthrene disk-shaped liquid crystal derivative self-assembles into a two-dimensional columnar superlattice nanostructure. The benzo[a]phenanthrene disk-shaped liquid crystal derivative has the structure shown in Formula I and / or Formula II, where R1 and R2 independently comprise a cycloalkane-furanyl or adamantyl group. Based on the self-assembly behavior of the benzo[a]phenanthrene disk-shaped liquid crystal derivative, this invention constructs an ordered columnar superlattice structure by controlling its steric hindrance and dipole interactions, significantly improving the charge transport efficiency and energy conversion efficiency of the device.

The present invention addresses the problem of providing a circularly polarizing plate and an organic EL display device capable of improving the visibility of black from an oblique direction. A circularly polarizing plate according to the present invention which has, in this order, a linear polarizer, a first optically anisotropic layer, a second optically anisotropic layer, a third optically anisotropic layer, and a fourth optically anisotropic layer, wherein: both the first optically anisotropic layer and the fourth optically anisotropic layer satisfy formula (1); the second optically anisotropic layer satisfies formula (2); and the third optically anisotropic layer is obtained by immobilizing a twisted-alignment discotic liquid crystal compound in which the thickness direction is the axis of twisting.　Formula (1): nx=ny>nz, formula (2): nz=nx>ny

The invention belongs to the technical field of materials, and particularly discloses a photocuring 3D printing formula of a high-strength workpiece containing triphenylene disc-shaped conjugated liquid crystal, the high-strength workpiece and a preparation method of the high-strength workpiece. The printing formula comprises a curing monomer, a cross-linking agent and a photoinitiator; the curing monomer comprises a liquid crystal monomer and a hydrogel monomer, and the cross-linking agent is triphenylene disc-shaped conjugated liquid crystal; the photocuring liquid crystal prepolymer system capable of being used for digital light processing (DLP) 3D printing is prepared according to the formula. DLP 3D printing equipment is used for layer-by-layer curing forming under ultraviolet irradiation, and the subsequent curing treatment and solvent replacement process are combined, so that an intelligent response type printing model with good three-dimensional structure precision, high thermotropic strength performance and a liquid crystal ordered structure is obtained. By regulating and controlling the proportion of the liquid crystal material to the hydrogel material, precise regulation and control of the mechanical strength and the like of a workpiece can be achieved, and the application potential of the disc-shaped liquid crystal material in flexible intelligent devices is expanded.

The invention belongs to the technical field of battery materials, and particularly discloses a preparation method and application of a modified diaphragm based on photopolymerization discotic liquid crystal, and the preparation method comprises the following steps: uniformly mixing and grinding photopolymerization discotic liquid crystal and a conductive agent, adding a photoinitiator and a solvent to obtain uniformly dispersed coating slurry, and drying to obtain the modified diaphragm based on the photopolymerization discotic liquid crystal. Coating a diaphragm substrate with the coating slurry to obtain a coating diaphragm; and carrying out ultraviolet light illumination polymerization on the coating diaphragm, and drying to finally obtain the photopolymerization-based discotic liquid crystal modified diaphragm. According to the invention, the diaphragm is modified by adopting the photopolymerization discotic liquid crystal, the improved coating diaphragm is coated with the discotic liquid crystal, so that the lithium-sulfur battery has good conductivity, migration between positive and negative electrodes of polysulfide ions can be effectively prevented, and a good channel is provided for lithium-sulfur reaction among the discotic layers of the liquid crystal; and the reaction activity of the lithium-sulfur battery is improved.

The invention belongs to the field of organic material chemistry, and discloses a preparation method and properties of X-type rigid bridging pyrene-triphenylene quadruplex discotic liquid crystal, and the X-type rigid bridging pyrene-triphenylene quadruplex discotic liquid crystal has a structure as shown in a general formula I. The compound shown in the general formula I is mainly synthesized from a pyrene tetraborate compound and a monobromobenzophenanthrene derivative through Suzuki-Miyaura cross coupling, the reaction condition is mild, the steps are simple and efficient, and the atom utilization rate is high. The compound has thermotropic liquid crystal property, the intermediate phase is a columnar phase (Col) and a nematic phase (N), the melting point and clearing point of the discotic liquid crystal compound are improved by introducing a rigid ring serving as a bridge, the temperature range of the liquid crystal intermediate phase is widened, the variety is enriched, and meanwhile, the compound has good fluorescence emission and quantum yield in a solution and a film aggregation state. The maximum responsivity of the organic photoconductive detector prepared by taking the Py-TP6 as the absorption layer is 1.25 A / W (the power is 1.18 mW / cm < 2 >), 2.40 A / W (the power is 1.52 mW / cm < 2 >) and 9.23 A / W (the power is 0.63 mW / cm < 2 >) at the wavelength of 405 nm, 532 nm and 650 nm respectively.

The invention discloses a chiral binaphthalene bridged perylene diimide circularly polarized light-emitting liquid crystal compound and a preparation method thereof, and the preparation method mainly comprises the following steps: taking 3-ethynyl-2, 2-dimethoxy-1, 1-binaphthalene or 3, 3-dimethoxy-1, 1-binaphthalene as a raw material, and carrying out a reaction to obtain the chiral binaphthalene bridged perylene diimide circularly polarized light-emitting liquid crystal compound. The preparation method comprises the following steps: respectively taking 3, 3 '-diethynyl-2, 2'-dimethoxy-1, 1 '-dinaphthalene as one of reactants, and carrying out palladium-catalyzed Sonogashira cross-coupling reaction on the reactants and the other reactant PDI-n to prepare the liquid crystal compound. The reactant PDI-n can be any one of 5-bromo-2, 9-bis (2-hexyloctyl) [2, 1, 9-def: 6, 5, 10-d'e 'f] diisoquinoline-1, 3, 8, 10 (2H, 9H)-tetraone, 5-bromo-2, 9-bis (2-octyldecyl) [2, 1, 9-def: 6, 5, 10-d'e' f] diisoquinoline-1, 3, 8, 10 (2H, 9H)-tetraone, 5-bromo-2, 9-bis (2-decyl dodecyl) [2, 1, 9-def: 6, 5, 10-d'e 'f] diisoquinoline-1, 3, 8, 10 (2H, 9H)-tetraone. By adopting a strategy of bridging chiral binaphthalene and perylene diimide, on one hand, the rotation angle of a conjugate surface limited sigma single bond is expanded, and on the other hand, an alkyl chain is introduced to enhance the solubility and facilitate self-assembly of a mesogenic phase state, so that the binaphthalene-based chiral discotic liquid crystal molecule compound is obtained.

The invention relates to a high-thermal-conductivity and low-dielectric composite material capable of being dynamically repaired and a preparation method and application thereof, and belongs to the technical field of electronic advanced packaging and high-frequency substrate thermal management materials. According to the invention, a traditional hydroxyl-containing binder is abandoned, and a boron-oxygen-six-ring-crosslinked 3D boron nitride bidirectional orientation skeleton is constructed in situ by using a self-condensation reaction of a boric acid precursor under bidirectional freeze concentration; meanwhile, novel polysiloxane with a discotic liquid crystal side chain and a dynamic borate network is synthesized; a vacuum-pressure alternating auxiliary impregnation process is utilized to induce the disc-shaped liquid crystal to be assembled on the surface of a framework in an epitaxial manner, and in-situ addition curing without byproducts is carried out. According to the invention, the industrial pain points that the traditional packaging material cannot give consideration to Z-axis high thermal conductivity, high-frequency ultralow dielectric loss and unreworkable property after curing are overcome, and the packaging material is especially suitable for the fields of 5G / 6G high-frequency communication and 2.5 D / 3D Chiplet advanced system-level packaging.

A liquid crystal polarization interference element is provided that suppresses fluctuation in the wavelength at which maximum transmittance occurs, even when light is incident at an oblique angle. The element includes two or more sets of liquid crystal layers, each set having a first liquid crystal layer and a second liquid crystal layer. Each of the first and second liquid crystal layers includes a liquid crystal layer R formed by immobilizing horizontally aligned rod-like liquid crystal compounds and a liquid crystal layer D formed by immobilizing vertically aligned disk-like liquid crystal compounds. The liquid crystal layer R and the liquid crystal layer D have parallel slow axes and equal in-plane retardations, and the first liquid crystal layer and the second liquid crystal layer have in-plane slow axes that intersect each other. An optical filter including the liquid crystal polarization interference element is also provided.

An object of the present invention is to provide a laminate including two cholesteric liquid crystal layers in which a reflectivity of the cholesteric liquid crystal layers formed by an application treatment is high. The laminate according to the present invention includes: a first cholesteric liquid crystal layer that is formed of a first composition including a first liquid crystal compound; and a second cholesteric liquid crystal layer that is formed on the first cholesteric liquid crystal layer by an application treatment using a second composition including a second liquid crystal compound, in which the first liquid crystal compound is a disk-like liquid crystal compound, the first liquid crystal compound is a compound different from the second liquid crystal compound, among bright lines and dark lines that are derived from a cholesteric liquid crystalline phase, in a case where a dark line at a farthest position from the first cholesteric liquid crystal layer side is represented by a surface layer dark line and a dark line at a closest position to an intermediate position in a thickness direction of the second cholesteric liquid crystal layer is represented by an intermediate dark line, a ratio of a region width where the surface layer dark line is present to a width of the intermediate dark line is 1.2 or less.

The invention belongs to the field of organic material chemistry, and discloses a preparation method and properties of propeller type tetraphenyl ethylene-triphenylene quadruplex discotic liquid crystal, and the propeller type tetraphenyl ethylene-triphenylene quadruplex discotic liquid crystal has a structure as shown in a general formula I. The compound shown in the general formula I is mainly synthesized from tetrabromo-tetraphenylethylene and a benzophenanthrene boric acid ester derivative through Suzuki coupling reaction, the atom utilization rate is high, and the steps are simple and efficient. The compound has thermotropic liquid crystal property, the TPE-TP4 is a smectic phase or a plastic crystal phase, the introduction of thiophene bridging stabilizes a columnar liquid crystal phase, and the temperature of a columnar intermediate phase of the TPE-ThTP4 reaches 213 DEG C or above. The TPE-TP4 and the TPE-ThTP4 both have an aggregation-induced emission enhancement effect, and the fluorescence quantum yield of the solution reaches 84% and 30%. The maximum responsivity of the photoconductive detector prepared by taking the TPE-TP4 as the absorption layer is 4.43 A / W and 8.35 A / W respectively at the wavelength of 650 nm and the wavelength of 405 nm.

The invention belongs to the field of organic material chemistry, and discloses a preparation method and properties of star-like graphene conjugated bridged benzophenanthrene discotic liquid crystals, and the star-like graphene conjugated bridged benzophenanthrene discotic liquid crystals have structures shown in general formulas I, II and III. The compounds as shown in the general formulas I, II and III are mainly synthesized from a polybrominated hexaphenylbenzene compound and a benzophenanthrene borate derivative through Suzuki-Miyaura cross-coupling, the steps are simple and efficient, the atom utilization rate is high, and the yield is stable. The compounds have reversible thermotropic liquid crystal properties, most of the mesophases are hexagonal (Colh) and rectangular (Colr) columnar phases, the melting point and clearing point of the concatemer compounds are effectively improved through expansion of the conjugation degree and introduction of ortho-position methyl, the temperature range of the liquid crystal mesophases is widened, the types of the liquid crystal mesophases are enriched, and the compounds have rich self-assembly morphologies in organic solvents. Meanwhile, good fluorescence emission and absolute quantum yield are achieved in a solution and a thin film aggregation state, and the maximum emission wavelength and the maximum quantum yield in the solution are 401-409 nm and 63.89% respectively (the maximum emission wavelength and the maximum quantum yield in the aggregation state are 415-434 nm and 61.38% in the aggregation state).

An object of present invention is to provide an optical laminate that can be used for a reflective circular polarizer with little occurrence of a ghost in a case of being used in a virtual reality display device, an electronic finder, or the like; a laminated optical film including the reflective circular polarizer; an optical article including the optical laminate; and a virtual reality display device including the optical article. The optical laminate of the present invention includes two or more laminated reflective layers, in which the laminated reflective layer includes one reflective layer A that includes at least one or more cholesteric liquid crystal layers formed of a first liquid crystal compound which substantially consists of a rod-like liquid crystal compound and that does not include a cholesteric liquid crystal layer formed of a second liquid crystal compound which substantially consists of a disk-like liquid crystal compound, and one reflective layer B that includes at least one or more cholesteric liquid crystal layers formed of the second liquid crystal compound which substantially consists of a disk-like liquid crystal compound and that does not include a cholesteric liquid crystal layer formed of the first liquid crystal compound which substantially consists of a rod-like liquid crystal compound, and predetermined requirements are satisfied.

The present disclosure provides a light-emitting device, a manufacturing method thereof, and a display device. The light-emitting device includes a composite hole transport layer. The composite hole transport layer includes a matrix and a discoidal liquid crystal component. The hole mobility of the discotic liquid crystal component is greater than the hole mobility of the matrix.

The objective of the present invention is to solve the problem of providing: a laminated optical element that, when used in a bandpass filter or the like that supports multiple wavelengths, can suppress fluctuations in the wavelength of light exhibiting maximum transmittance, even in cases where the light is incident from an oblique direction; an optical filter using said laminated optical element; and an optical system using said laminated optical element. The problem is solved by including two or more pairs each comprising a first liquid crystal layer and a second liquid crystal layer, the first and / or second liquid crystal layer including a liquid crystal layer in which a rod-like liquid crystal compound is fixed in place and / or a liquid crystal layer in which a discotic liquid crystal compound is fixed in place, the first and second liquid crystal layers having a plurality of liquid crystal polarization interference elements with intersecting in-plane slow phase axes and equal in-plane retardation, and furthermore, the liquid crystal polarization interference elements having mutually different total in-plane retardations in the first liquid crystal layer.

The invention provides a light-emitting device, a preparation method thereof and a display device. The light emitting device includes a composite hole transport layer including a matrix and a discotic liquid crystal component, the discotic liquid crystal component having a hole mobility greater than a hole mobility of the matrix.