57results about How to "Optically active" patented technology

The invention discloses an addition type photocuring organic silicon rubber composition. The addition type photocuring organic silicon rubber composition is prepared from, by mass, 30-100 parts of vinyl containing polysiloxane, 0-70 parts of filler, 5-30 parts of cross-linking agent, 0.1-1 part of catalyst with optical activity and 0.01-0.1 part of inhibitor. Photocuring organic silicon rubber is compared with other photocuring organic silicon materials, organosilicon polymer includes methyl vinyl polysiloxane, methyl vinyl organic silicone resin and hydrogen containing silicone oil, the photosensitive perssad of photoresponse is Si-CH=CH2 and Si-H, the prepared organic silicon rubber can be widely used for the fields of electronic component coating, embedment protection and the like, and curing time is short.

The invention provides a method for preparing polycarbonate with optical activity by catalyzing asymmetric alternative copolymerization with racemic oxiraneic hydrocarbon and carbon dioxide, employing bi-component catalyst with chirality catalyzing the antimer of the racemic oxiraneic hydrocarbon selectively at the temperature of 0~80 DEG C, and copolymarizating with carbon dioxide to preparepolycarbonate with optical activity. The bi-component catalyst consists of host catalyst, the chirality quadridentate schiff bases metallic complexe, SalenMX; and the catalyst promoter, the salt of R1R23YX1 or (R13P)2YX1, with the proportion in moles 0.2~10:1. The proportion between catalyst and oxiranic hydrocarbon is 1:500~10000 in moles, the initial pressure of carbon dioxide is 0.1~4.0 Mpa, and the reacting for 0.5~24 hours. The method is characterized by the temperate reaction condition and the simple process; the simple synthesis of the chirality catalyst and low production cost and high reactive and suitable for industrial application.

The invention provides a method for splitting 2-heterocycle substituted dihydro pyrimidine racemic body, which comprises the following steps: (1) putting the 2-heterocycle substituted dihydro pyrimidine racemic body and 1,1'-Binaphthyl-2,2'-diyl hydrogenphosphate resolving agent with optical activity in a reactor, and adding a solvent; (2) stirring the mixture; (3) filtering the mixture, concentrating a mother solution and standing the mother solution; (4) filtering and concentrating the mother solution to be dry; and (5) refining. The single chiral 2-heterocycle substituted dihydro pyrimidine compounds prepared by the splitting method has the product yield about 20 percent and the optical purity above 98 percent; and the splitting method has the advantages of stability, high yield, high optical purity, simple and convenient operation, strong practicability and easy industrialization.

The invention provides a method for splitting 2-heterocycle substituted dihydro pyrimidine racemic body, which comprises the following steps: (1) putting the 2-heterocycle substituted dihydro pyrimidine racemic body and O,O-diaroyl tartaric acid resolving agent with optical activity in a reactor, adding a solvent and stirring the mixture; (2) filtering the mixture, concentrating a mother solution and standing the mother solution; (3) filtering and concentrating the mother solution to be dry, and obtaining a concentrate; and (4) refining the concentrate. The splitting method adopted for preparing single chiral 2-heterocycle substituted dihydro pyrimidine compounds has the product yield more than 20 percent and the optical purity above 98 percent; and the splitting method has the advantages of stability, high yield, high optical purity, simple and convenient operation, strong practicability and easy industrialization.

The invention provides a chiral nano film and a preparation method and application thereof. The preparation method of the chiral nano film comprises the steps that a one-dimensional nanomaterial solution is spread on a lower phase in a Langmuir-Blodgett groove, a slide barrier located on the surface of the lower phase pushes a one-dimensional nanomaterial to move on the surface of the lower phase after the solvent is completely volatilized, the area of the one-dimensional nanomaterial is compressed to obtain a one-dimensional nanomaterial assembly film consistent in orientation; a Langmui-Schaeffer transfer method is adopted to transfer the assembly film to a substrate, and the chiral film provided with at least two layers of assembly films is obtained, wherein the assembly films are sequentially staggered clockwise or anticlockwise. The chiral film has ultra-high optical activity, an anisotropy factor is as high as 0.3, the optical activity is highest compared with chiral materials obtained by adopting an existing assembly means, and the preparation method is simple and has universality and wide application prospect.

The present invention discloses a perovskite thin film and a preparation method thereof, and applications, pertaining to the technical field of perovskite. The method comprises the following steps: (1) making PbI2 into a solution by adopting an organic solvent, and obtaining a PbI2 solution; (2) adding cesium iodide, formamidine hydriodate and 1-naphthyl methyl ammonium iodide into the PbI2 solution, stirring, and obtaining a perovskite precursor solution; (3) making polyethylene oxide into the solution by using the organic solvent, and obtaining a polyethylene oxide solution; and (4) mixing the perovskite precursor solution and the polyethylene oxide solution, forming film(s), and obtaining the perovskite thin film(s). The method is simple, the prepared perovskite thin film has the advantages of more perovskite alpha phase(s), small crystal grain size and relatively high thin film coverage rate and regularity, and the perovskite thin film has excellent optical properties in light-emitting devices. The perovskite thin film is used for the light-emitting devices.

The invention discloses a liquid crystal display panel and a liquid crystal display device. A display area of the liquid crystal display panel comprises a pixel layer, a liquid crystal layer, a firstpolaroid and an optical sensor which are arranged in sequence. The first polaroid comprises a first polarizing unit and a second polarizing unit, wherein the polarizing directions of the first polarizing unit and the second polarizing unit are perpendicular and adjacent. The liquid crystal layer comprises a first liquid crystal unit corresponding to the first polarization unit and a second liquidcrystal unit corresponding to the second polarization unit, the polarization direction of polarized light passing through the first liquid crystal unit is kept unchanged, and the polarization direction of polarized light passing through the second liquid crystal unit rotates by 90 degrees; the pixel layer comprises a transparent area corresponding to the first liquid crystal unit and a pixel areacorresponding to the second liquid crystal unit; and the optical sensor is arranged corresponding to the first polarizing unit. According to the optical sensor, a collimation light path is provided for the optical sensor through the transparent area, the first liquid crystal unit and the first polarization unit which are correspondingly arranged, the optical crosstalk is avoided, and the LCD under-screen sensing technology is achieved.

The invention discloses an optically-active helix chain poly(phenyl isocyanide) and a polymerization method thereof. The polymerization process is shown as the general formula in the description; in the formula, the structural formula of a chiral phosphine ligand is shown in the description. A palladium catalyst is adopted, the chiral phosphine ligand (S-or R-BINAP) is added to induce polymerization of achiral phenyl isocyanide, and the optically-active polymer with excessive one-handed helixes is obtained; obtained poly(phenyl isocyanide) has a high molecular weight and narrow molecular weight distribution.

The invention relates to preparation and application of a phenylalanine dipeptide-graphene quantum dot composite material. The preparation includes the following steps: preparation of graphene quantum dots, preparation of the phenylalanine dipeptide-graphene quantum dot composite material, preparation of a phenylalanine dipeptide-graphene quantum dot composite material modified electrode, and electrochemical method identification of tryptophan enantiomers. The beneficial effects are that the preparation method of the phenylalanine dipeptide-graphene quantum dot composite material modified electrode is simple and environment-friendly, and the phenylalanine dipeptide-graphene quantum dot composite material modified electrode has better tryptophan enantiomer recognition ability because of some optical rotation of the phenylalanine dipeptide.

The invention discloses a chiral geminal disilicide alkane compound containing four silicon-hydrogen bonds, shown as a formula VI, and discloses a synthesis method of the chiral geminal disilicide alkane compound. For the first method, in inert gas, a vinyl silane type compound shown as a formula V and silane trihydride shown as a formula IV are used as raw materials; a chiral CoX2-IIP complex compound is used as a catalyst; under the existence of reducing agents, reaction is performed to prepare VI. For the second method, in the inert gas, alkyne shown as a formula I, silane trihydride shownas a formula II and silane trihydride shown as a formula IV are used as raw materials; CoY2, bi(2-diphenyl phosphenyl) ether and a chiral CoX2-IIP complex compound are used as catalysts; under the existence of reducing agents, reaction is performed to prepare a formula VI. The method has the advantages of mild reaction conditions, operation simplicity and convenience, high atom economy, excellentproductive rate (57 to 84 percent), high regioselectivity (greater than 19:1) and high enantioselectivity (91.6 to 98.8 percent ee). The formulas are shown in description.

The present invention relates to chiral porphyrin complex nanotweezers and a preparation method thereof and a method for separating narrow (n, m) value distribution and optically active carbon tubes from single-walled carbon nanotubes by the chiral porphyrin complex nanotweezers. It has a chemical structural formula represented by the following general formula R or general formula S: wherein, Ar is a soluble aryl group; M is a transition metal element; the general formula R is a right-handed nanotweezer molecule, and the general formula S is a left-handed nanotweezer molecule. The beneficial effects of the present invention are: the chiral porphyrin complex of the present invention can effectively separate narrow (n, m) value distribution and optically active carbon tubes from single-walled carbon nanotubes, and the separation method is relatively simple and practical, The separated carbon nanotubes have dual properties: one is optically active and can be used for chiral sensor research; the other has narrow (n, m) value distribution, which can be used to construct various organic photoelectric devices.

The invention discloses a method for preparing thioalkyl / alkenyl cysteine sulfoxide by fractional crystallization, belonging to the technical field of compound preparation. The method comprises the following steps: adding cysteine or cysteine salts, a sodium hydroxide solution and an R group (alkyl or alkenyl)-derived material into absolute ethanol in sequence for reaction to synthesize coarse ACSs, re-crystallizing ACSs, purifying, oxidizing to form ACSOs, and fractionally crystallizing to obtain natural dextrorotatory ACSOs, wherein the R group-derived material is replaced to synthesize different types of ACSOs in allium; enantiomers in racemes are separated by adopting the fractional crystallization method to obtain natural dextrorotatory ACSOs with optical activity. Compared with a conventional extraction method, the method has the characteristics that the yield and the purity are high, a conventional complicated extraction process is avoided, the product has the optical activity, and the physical property is close to that of natural extract; the product is used in the fields of health products, pharmaceuticals and the like, the effects of resisting bacteria and cancers, reducing blood fat and the like of ACSOs are brought into play, or the product serves as an intermediate such as an active ingredient-diallyl thiosulfinate for synthesizing allium.

The invention discloses an azo liquid crystal monomer with reaction properties and a preparation method thereof. The structural formula of the compound is listed, wherein, the n1 is an integer between 6 and 14, n2 is an integer between 1 and 7 and n3 is an integer between 1 and 5; the substitute position of the dilute oxygen is the adjacent position or contraposition of alkoxy; a synthesis method of the compound is that: the substituted dilute oxygen pairs by alkoxy benzoic acid is adopted as raw material to obtain aniline compounds by processes of amidation and hoffman degradation reaction; then low temperature diazotization coupling is carried out to obtain the new liquid crystal compound. A central bridge bond of the liquid crystal monomer of the invention is the azo group and has optical activity and a side chain of the invention is double bonds with reactivity; at last, novel waist connected type macromolecule liquid crystal and liquid crystal elastomer are made by polymerization or graft the double bonds to macromolecule main chain. The invention has easy obtained raw material, simple and safe operation and being applied to such fields as non-linear optical materials, optical information storage, optical switch, display, artificial muscles, shape memory and biomedicine.

The invention provides an optical element parallel with the electric field direction parallel to a liquid crystal layer. The optical element with the electric field direction parallel to the liquid crystal layer comprises an upper base plate, a lower base plate and the liquid crystal layer, wherein the lower base plate is positioned below the upper base plate, and the liquid crystal layer is positioned between the upper base plate and the lower base plate and comprises a positive or negative liquid crystal medium, and the liquid crystal medium comprises at least one optical activity component. According to the optical element, liquid crystal molecules in an electric field can obtain high power so as to rapidly rotate 90 degrees with low driving voltage, the use requirements of a display on the low driving voltage can be met, and a liquid crystal composition between the upper base plate and the lower base plate has low viscosity and a high clearing point.

The invention discloses a method for constructing a tartaric acid coating layer with a corrosion protection function on the surface of magnesium metal. The method comprises the following steps: A. polishing and carrying out ultrasonic cleaning on a pickling solution; B. soaking the magnesium metal obtained in the step A in NaOH solution with a concentration of 3mol / L, placing the NaOH solution in a water bath environment at 50-70 DEG C, standing for 11-14h, carrying out alkaline activation pre-treatment, then thoroughly washing the magnesium metal, and then drying the magnesium metal; C. preparing a tartaric acid solution with a concentration of 5-25g / L, and adjusting the pH value of the tartaric acid solution to achieve 5-9 by virtue of NaOH with a concentration of 1mol / L; and D. soaking the magnesium metal obtained in the step B in the tartaric acid solution prepared in the step C, placing the tartaric acid solution in a water bath environment at 30-80 DEG C, standing for 3-12h, then taking out the magnesium metal and thoroughly washing the magnesium metal by virtue of deionized water, and carrying out vacuum drying; and the tartaric acid coating layer with the corrosion protection function is successfully constructed on the surface of the magnesium metal. After the surface of the magnesium metal is modified through the method, the corrosion speed of a corrosive environment for the magnesium metal can be much effectively controlled, so that the corrosion-degradation period of the magnesium metal is matched with the treatment-recovery period of organisms when the magnesium metal is used as a biodegradable medical material.

The invention discloses a fluorine pyridine fluorescent material and a preparation method thereof. The invention is characterized in that the fluorescent material is a fluorine pyridine organic compound with a molecular formula of C23H16N2, a monocline crystal system, a P21 / c space group, and cell parameters: a=11.235Angstrom, b=24.361Angstrom, c=13.318Angstrom, alpha=gamma=90 degrees, and beta=113.13 degrees. The fluorescent material is prepared by a synthetic reaction of 2, 7-dibromofluorene, 4-pyridine boric acid, tetrakis(triphenylphosphine)palladium and sodium carbonate according to a certain ratio. The fluorine pyridine fluorescent material has a definite space structure and an accurate molecular formula, simple synthesis procedures, and high yield (up to 70-80%); and through the introduction of pyridyl groups at 2 and 7 sites, the electron cloud density of the material is increased, the stability and solubility property of the material are improved, the luminescence performance of the material is enhanced, and the luminous efficiency of the material is improved.

The invention provides a method for inducing an asymmetric sulfydryl-alkene click reaction through a chiral inorganic liquid crystal carrier. The method comprises the following step: carrying out click reaction on a sulfhydryl compound with chiral carbon and olefin in a chiral inorganic liquid crystal phase under the irradiation of ultraviolet light with the wavelength of 300-400 nm to obtain thecompound with optical activity. In the invention, the sulfhydryl compounds and alkene small molecules are subjected to a photocatalytic reaction through ultraviolet irradiation in a microenvironment with a chiral inorganic liquid crystal phase to form small molecules with optical activity, so that the chiral catalysis is achieved through chiral inorganic liquid crystals such as a silver nanowire cholesteric chiral liquid crystal phase for the first time, and optically active molecules are prepared. A certain enlightenment effect is achieved on the biological homochirality phenomenon and the life origin.

The invention discloses an addition type photocuring organic silicon rubber composition. The addition type photocuring organic silicon rubber composition is prepared from, by mass, 30-100 parts of vinyl containing polysiloxane, 0-70 parts of filler, 5-30 parts of cross-linking agent, 0.1-1 part of catalyst with optical activity and 0.01-0.1 part of inhibitor. Photocuring organic silicon rubber is compared with other photocuring organic silicon materials, organosilicon polymer includes methyl vinyl polysiloxane, methyl vinyl organic silicone resin and hydrogen containing silicone oil, the photosensitive perssad of photoresponse is Si-CH=CH2 and Si-H, the prepared organic silicon rubber can be widely used for the fields of electronic component coating, embedment protection and the like, and curing time is short.

The invention discloses a bunch of red flowering accelerator and a use method thereof. The bunch of red flowering accelerator is composed of O,O-dimethyl-S-[(4-carbonyl-1,2,3-benzene Triazine-3(4H-yl)-methyl]phosphorodithioate, β-hydroxyethylhydrazine, and sucrose are compatible, and the weight-to-mass ratio of the three components is 4.0-5.0:2.0-3.0: 6.0 to 8.0, the preferred ratio is 4.5:2.5:7.0, and the three components are calculated according to the weight to mass ratio of 100% purity. When in use, dilute it at a concentration of 600-700 mg.L‑1 and spray it immediately. The operation should be carried out in the evening on cloudy or sunny days. After spraying, it is guaranteed that there will be no rain within 24 hours, and artificial sprinkler irrigation will not be carried out during this period. After 24 hours, apply water and fertilizer once, and carry out routine fertilizer and water management and pest control after spraying. The dosage form of the preparation is stable, easy to operate, low in use cost, and has a remarkable effect of promoting flowering. The single agents in the preparation have synergistic effects, and are a good flowering accelerator for a string of reds.

A beta-functional group multi-substituted 1-propen-3-ol and its synthesis are disclosed. The process is carried out by carbon-metal reacting Grignard reagent with diolefine to generate carbon-carbon bond and carbon-metal bond, and reacting with various reagents to obtain a series of beta-functional group multi-substituted propen compound. It's simple and easy, has better regional and spatial selectivity and can be used for various substituted propens.

The invention discloses a method for preparing an Ag-Au bimetallic composite film based on bovine serum albumin regulation and control. The method is characterized in that a silver film with a uniformperiodic nanostructure is prepared by a simple and efficient ion sputtering method by taking a two-dimensional colloidal crystal constructed by macromolecular composite microgel as a substrate, a uniformly assembled BSA film is regulated and controlled on the surface of the silver film, not only the stability of the nano-silver film can be remarkably improved, but also the regulation and controlof the Ag-Au bimetal replacement reaction process can be realized by utilizing the auxiliary reduction effect of the BSA. More importantly, the method only needs to simply change the concentration ofthe tetrachloro-alloyed acid and the concentration of the BSA, so that the Ag-Au bimetal composite nanoparticle membrane structure can be adjusted, and meanwhile, the surface plasma resonance performance of the Ag-Au bimetal composite membrane material can be adjusted and controlled.

The invention provides a method for splitting 2-heterocycle substituted dihydro pyrimidine racemic body, which comprises the following steps: (1) putting the 2-heterocycle substituted dihydro pyrimidine racemic body and 1,1'-Binaphthyl-2,2'-diyl hydrogenphosphate resolving agent with optical activity in a reactor, and adding a solvent; (2) stirring the mixture; (3) filtering the mixture, concentrating a mother solution and standing the mother solution; (4) filtering and concentrating the mother solution to be dry; and (5) refining. The single chiral 2-heterocycle substituted dihydro pyrimidine compounds prepared by the splitting method has the product yield about 20 percent and the optical purity above 98 percent; and the splitting method has the advantages of stability, high yield, high optical purity, simple and convenient operation, strong practicability and easy industrialization.

The invention discloses a preparation method of an optically active AIE fluorescent material water-based polymer. The preparation method comprises the following steps: A, synthesizing an aldehyde group AIE fluorescent compound by utilizing a Suzuki coupling reaction between phenylboronic acid and bromobenzene; B, synthesizing a methoxy fluorescent compound by utilizing a condensation reaction between an aldehyde group and phenyl acetonitrile, and further demethylating methoxy through BBr3 to generate hydroxyl; C, introducing tertiary hydroxyl into the fluorescent compound through a nucleophilic substitution reaction between benzene hydroxyl and fatty chlorine to generate a corresponding tertiary hydroxyl AIE fluorescent compound; D, introducing an acrylic acid element into the fluorescentcompound through a selective ester exchange reaction under the catalysis of lipase B to obtain an AIE fluorescent monomer with optical activity; and E, preparing the AIE fluorescent polymer with optical activity through RAFT active polymerization. The fluorescent dye and polymer have optical activity.

The invention provides a chiral noble metal nanoparticle and a preparation method thereof. The chiral noble metal nanoparticle is a noble metal nanorod whose long axis surface is coated with a noble metal shell arranged helically in a single direction; After the surface of the rod is modified with chiral thiol molecules, it is possible to generate optically active chiral noble metal nanoparticles "bottom-up". The above-mentioned structure and its synthesis method belong to a new breakthrough in the field of nanostructure regulation. The present invention provides The preparation method of chiral noble metal nanoparticles can prepare chiral noble metal nanoparticles with high efficiency, and the yield and cost can be controlled. The obtained chiral noble metal nanoparticles have an unusually stable and clear microstructure, and the circular dichroism signal It is about 600 millidegrees ahead of other materials with similar structures, and has great application prospects in the fields of chiral catalysis, chiral separation, detection of chiral compounds, and chiral optical devices.

The invention relates to the technical field of optical materials, in particular to a preparation method of chiral-magnetic hydrogel, which comprises the following steps: modifying magnetic nanoparticles by using a chiral ligand to obtain chiral ligand modified magnetic nanoparticles; mixing the chiral ligand modified magnetic nanoparticles with a hydrogel monomer, a cross-linking agent, a catalyst and an initiator to prepare magnetic hydrogel; the prepared magnetic hydrogel is placed in a parallel magnetic field to be directionally magnetized, and the chiral-magnetic hydrogel is obtained. After the magnetic hydrogel prepared by the method is directionally magnetized, a local magnetic field can be formed in the hydrogel, the optical activity of the material can be adjusted by the local magnetic field, and the overall optical activity of the material also changes along with the change of the magnetic field intensity.

The invention discloses a preparation method of an optically active AIE fluorescent material water-based polymer, comprising the following steps: A. synthesizing an aldehyde-based AIE fluorescent compound by using the Suzuki coupling reaction of phenylboronic acid and bromobenzene; B. using an aldehyde group and phenylacetonitrile The condensation reaction between the methoxyl fluorescent compounds was synthesized, which was further processed by BBr 3 Demethylation of the methoxy group to generate a hydroxyl group; C. Through the nucleophilic substitution reaction between the phenyl hydroxyl group and aliphatic chlorine, the tertiary hydroxyl group is introduced into the fluorescent compound to generate the corresponding tertiary hydroxyl group AIE fluorescent compound; D. By lipase B. The selective transesterification reaction catalyzed by the introduction of acrylic acid group into the fluorescent compound to obtain the AIE fluorescent monomer with optical activity; E. The AIE fluorescent polymer with optical activity is prepared by RAFT active polymerization. The fluorescent dyes and polymers are optically active.

The invention relates to polycarbonate with optical activity and a preparation method thereof, belonging to the technical field of polymer synthesis. A repetitive unit of the polycarbonate is shown in the description, wherein R1-R3 are -H or alkyl. The preparation method of the polycarbonate comprises the following steps: dispersing an epoxide and a catalyst into an organic solvent, and performing a carbon dioxide bubbling reaction for 30-40h, thus obtaining the polycarbonate; the epoxide is shown in the description. The prepared polycarbonate has optical activity, a number-average molar mass of more than 3000, and a vitrification transformation temperature being more than 150 DEG C, maximally 272 DEG C, and the polycarbonate can be used as a high temperature-resistant polymer material and be applied to fields with harsh work environments. The preparation method can be implemented under room temperature, the pressure requirement on carbon dioxide is very low, reaction conditions are mild, the optical selectivity is high, and a prepared product has extremely high optical purity and wide industrial promotion value.

The invention belongs to the technical field of perovskite, and discloses a perovskite thin film, a preparation method and application thereof. Method: 1) adopt organic solvent to PbI 2 Dubbed into a solution to obtain PbI 2 solution; 2) cesium iodide, formamidine hydriodide and 1-naphthylmethylammonium iodide are added to PbI 2 solution, stirring to obtain a perovskite precursor solution; 3) using an organic solvent to make polyethylene oxide into a solution to obtain a polyethylene oxide solution; mixing the perovskite precursor solution with the polyethylene oxide solution , forming a film to obtain a perovskite film. The method of the invention is simple, and the prepared perovskite thin film has many alpha phases of perovskite, small grain size, high film coverage and regularity, and excellent optical characteristics in light-emitting devices. The perovskite thin film is used for light emitting devices.

The purpose of the present invention is to provide: a method for separating, with good precision, CNT having optical activity with a single (n, m); and optically active carbon nanotubes obtained thereby. A plurality of gel-packed columns are connected in series, an excess amount of carbon nanotube dispersion is passed through the columns, carbon nanotubes having specific optical activity are adsorbed in each column, and carbon nanotubes having optical activity and a specific structure are separated out with precision by elution by respective eluents.