19 results about "Chiral polymers" patented technology

The invention discloses a preparation method and application of a chiral phosphoric acid intrinsic microporous polymer membrane. In the invention, R / S-1, 1 '-co-2-naphthol and indole-2, 3-dione or a derivative thereof are taken as monomers, and the soluble chiral polymer with an intrinsic microporous structure is prepared through catalytic polymerization. After the polymer forms a film, phosphorylation treatment is carried out, a phosphate group is introduced, and the chiral phosphoric acid intrinsic microporous polymer film is obtained. The membrane has high specific surface area and chiral recognition sites, shows excellent enantiomer selectivity and permeability, can be widely applied to efficient separation of chiral small molecular enantiomers, has important application value and popularization prospect in the field of chiral separation, can simultaneously realize integration of microporous channels, chiral environments and multifunctional phosphate groups, and has broad application prospects. Therefore, breakthrough balance is achieved between chiral selectivity and permeation flux, and a new material platform is provided for chiral membrane separation.

The invention belongs to the technical field of high polymer chemistry and material science, and particularly relates to application of a salicylaldehyde Schiff base chiral polymer in iron and copper ion detection, and the structural formula of the salicylaldehyde Schiff base chiral polymer is one of the following structures shown in the specification. . The salicylaldehyde Schiff base chiral polymer has high selectivity to copper ions and iron ions, and qualitative detection of the copper ions and the iron ions can be achieved according to changes of ultraviolet absorption spectrums, digital circular dichroism spectrums and fluorescence spectrums before and after coordination of the salicylaldehyde Schiff base chiral polymer with the copper ions and the iron ions.

The invention provides a chiral polymer film, a circularly polarized luminescent material and a preparation method, and relates to the technical field of circularly polarized luminescent materials. The preparation method of the chiral polymer film comprises the following steps: mixing nematic liquid crystal, a chiral dopant, a polymer monomer, a cross-linking agent, a photoinitiator and a first solvent to obtain a mixture; pouring the mixture on a screen plate, and carrying out silk-screen printing on a substrate to obtain a first intermediate product; irradiating the first intermediate product with ultraviolet light to obtain a second intermediate product; and soaking the second intermediate product with a second solvent to obtain the chiral polymer film. The preparation period of the chiral polymer film can be shortened, large-scale preparation can be realized, the process is simple and convenient, and the problem of difficulty in patterning is solved.

The application provides a kind of anti-counterfeiting composite material and its preparation method and application, more particularly to a kind of near infrared circular polarized light, unclonable function anti-counterfeiting composite material and its preparation method and application.The anti-counterfeiting composite material includes chiral polymer film and luminescent particles loaded on the chiral polymer film;The chiral polymer film has a photonic band gap, and the band gap center position matches the luminescent wavelength of the luminescent particles.The application designs the specific composition of the anti-counterfeiting composite material, and obtains the anti-counterfeiting composite material with near infrared circular polarized light physical unclonable function, which has three dimensions of information of near infrared, circular polarized luminescence and luminescence asymmetry factor, encodes the information of the three dimensions to obtain the binary key of the physical unclonable function, and only when the triple key matches can it be confirmed as a genuine product, greatly improving the information security.

The invention discloses a preparation method of a chiral dendronized diacetylene acid molecule and a supramolecular chiral assembly of the chiral dendronized diacetylene acid molecule, and relates to the field of intelligent chiral materials.The preparation method comprises the steps that firstly, tree-shaped alkoxy ether is combined with PCDA through lysine, the tree-shaped alkoxy ether serves as a hydrophilic element, lysine serves as a chiral source and can provide a large number of hydrogen bonds, the PCDA serves as a hydrophobic element, and the supermolecular chiral assembly of the chiral dendronized diacetylene acid molecule is obtained; chiral dendronized diacetylene acid molecules are designed and synthesized; then, supermolecule chiral assembly is carried out through driving of non-covalent interaction, and supermolecule chiral assembly is regulated and controlled through temperature and light; furthermore, the supramolecular chiral assembly is subjected to optical topological polymerization reaction to prepare the valence-donating chiral polymer. The invention opens up a new way for creating a novel intelligent chiral nano material with a special structure and excellent characteristics.

A piezoelectric element includes: a piezoelectric body having a first surface and a second surface that are different from each other; a first electrode provided at the first surface; and a second electrode provided at the second surface. The piezoelectric body contains a helical chiral polymer crystal having an orientation axis as a crystal axis, the orientation axis is uniaxially oriented in a manner of intersecting both the first surface and the second surface, and a degree of orientation of the orientation axis in the piezoelectric body is 0.80 or more.

The application discloses a method for separating spirodiphenol by using an analog moving bed chromatography. The method for separating spirodiphenol specifically disclosed comprises the following steps: separating left-handed spirodiphenol and right-handed spirodiphenol from a spirodiphenol racemate by using an analog moving bed chromatography system; and the analog moving bed chromatography system has the following conditions: a stationary phase: silica gel coated with chiral polymer; and a mobile phase: a mixed solution of n-hexane and ethanol. The application can realize complete separation of two single enantiomers, obtain high purity and high recovery rate, and is more suitable for industrial production while being continuously operated. The process has strong stability, constant product quality, high automation degree, higher yield and lower cost than batch chromatography. The method also has the advantages of high yield, low cost, recyclable elution phase, green environmental protection, automatic and continuous production, stable product quality and the like.

A liquid crystal display (LCD) of the chiral polymer stabilized alignment (C-PSA) mode, a method of its production and its use as an energy-saving display.

The present invention relates to an optical element comprising a chiral liquid crystal (LC) polymer film as a sub-class of liquid crystal materials, a method for the production thereof and the use of the optical element as a diffractive optical element in optical or electro-optical components or devices, in particular for digital optical or augmented reality or virtual reality (AR / VR) applications, such as a polarizer, an optical compensator, a reflective film, a diffraction grating or surface grating, a Bragg polarization grating (Bragg PG), a polarization volume grating (PVG), a polarization volume hologram (PVH), a Pangulam-Bell (PB) grating, a non-mechanical beam steering element, an optical waveguide, an optical coupler, an optical combiner, a polarization beam splitter, a partial mirror or a lens.

A kind of circularly polarized chiral organic fluorescent light emitting material and its preparation method and application belong to the technical field of design, preparation and application of chiral polymer functional materials.The chiral binaphthyl compound R / S-2 prepared as chiral monomer is coupled with the monomer of fluorenyl chromophore group with single bond, double bond and triple bond connector to prepare three intrinsic chiral polymer functional fluorescent light emitting materials R / S-P1, R / S-P2 and R / S-P3 with different conjugated main chain conformations by Suzuki, Heck and Sonogashira coupling polymerization reaction, and their photophysical properties and chiral luminescence performance in thin film state are studied.The experiment proves that the product prepared by the application embodies the controllable photophysical properties in test, and has certain circular dichroism and circularly polarized luminescence properties, indicating that it is expected to be applied in the field of chiral solid-state display material and optoelectronic device.

The invention discloses a preparation method and application of chiral polymer gel, and belongs to the technical field of gel materials. A chiral amide monomer derived from acrylic acid is used as a construction module, a chiral enantiomer dominant conformation-assembly-chiral gel structure regulation strategy is provided, chiral polymer gel is successfully prepared, and a universal platform is provided for development of CPL materials. The circularly polarized luminescent gel can be obtained by doping luminescent materials (400-750 nm) with different emission wavelengths into the chiral gel, the glum value is close to-0.0092, a multifunctional platform is provided for the design of a visible CPL material, and the circularly polarized luminescent gel has wide application prospects in the fields of chiral optics, anti-counterfeiting and biosensing.

The invention provides a chiral ruthenium catalyst as well as a preparation method and application thereof. The structure of the chiral ruthenium catalyst is shown as a formula (1) or a formula (2), and the chiral ruthenium catalyst is suitable for asymmetric ring-opening cross olefin metathesis polymerization reaction and can be used for preparing chiral polymers. The invention also provides a preparation method and application of the chiral ruthenium catalyst.

The invention discloses a bio-based chiral carbon dot as well as a preparation method and application thereof, and belongs to the technical field of asymmetric catalysis. The preparation method of the bio-based chiral carbon dots comprises the following steps: dispersing chiral amino acid and a rhodium metal complex in deionized water for hydrothermal reaction, cooling after the reaction is finished, filtering, and removing a solvent to obtain the bio-based chiral carbon dots. The transition metal element (Rh) is doped into the carbon dots (CDs), and the catalytic performance can be remarkably enhanced by adjusting the electronic structure and surface active sites of the carbon dots. Monomer coordination polymerization can be achieved through surface active sites, helical conformation of a polymer chain can be induced through a chiral microenvironment, and precise regulation and control of stereoselectivity of the polymerization reaction are achieved. The bifunctional carbon dot system provides a new thought for green synthesis of chiral high polymer materials, and particularly shows potential in the field of asymmetric catalysis.

An injection-molded article of polymer piezoelectric material includes: a helical chiral polymer constituted by a polymer chain and having a unit cell with an a-axis, a b-axis, and a c-axis as crystal axes, wherein b-axis<a-axis<c-axis in terms of lengths of the crystal axes, the c-axis is parallel to a long chain direction of the polymer chain, the helical chiral polymer is a crystal in which the b-axis is uniaxially oriented, and the injection-molded article has piezoelectricity.

This invention belongs to the field of chiral polymer technology, and provides a chiral polypropynylamine compound with the general structural formula R. 1 ~R 10 Independently, the radicals are phenyl, benzophenone, triphenylamine, o-tolyl, 1-naphthyl, or alkoxyphenyl; n is any integer from 2 to 4000; wavy lines represent omitted repeating polymer segments; asterisks indicate that the carbon atom here has a certain stereoselectivity. This invention also provides a method for preparing chiral polypropynylamine compounds and their applications. This invention uses monomers completely lacking a chiral center as reaction substrates to prepare chiral polypropynylamine compounds in high yield, effectively solving the problems of high temperature, large metal catalyst feed amount, and lack of chiral polymer structures existing in the prior art; the preparation method of this invention can extend the substrate of polypropynylamine to aromatic amine monomers, preparing polymer materials with diverse functions.

The invention provides a chiral polymer fabric composite material, an electromagnetic shielding component and preparation methods of the chiral polymer fabric composite material and the electromagnetic shielding component. The chiral polymer fabric composite material comprises at least two hardened matrix layers and at least one chiral polymer fabric layer which are alternately stacked, each chiral polymer fabric layer is clamped between two adjacent hardened matrix layers; wherein the chiral polymer fabric layers are prepared by loading chiral polymers on fiber fabrics, and the number of the chiral polymer fabric layers in the chiral polymer fabric composite material is 1-5; the thickness of the chiral polymer fabric layer is 0.01-5mm, and the electromagnetic shielding effectiveness SET is greater than 25dB. The impedance gradient structure of the multi-layer chiral polymer fabric is constructed, so that the absorption loss of electromagnetic waves is remarkably enhanced, green shielding is achieved, and the dual requirements of civil and military facilities and other scenes for efficient electromagnetic shielding and excellent engineering performance of a main body structure material are finally met.

The application belongs to the technical field of chemical energy storage batteries, and particularly provides a chiral hydrogel electrolyte based on supramolecular assembly and a preparation method thereof, so as to solve the problems of ion channel disorder and insufficient free water binding of traditional non-chiral gel electrolytes; the application introduces single pure configuration chiral guest molecules into a non-chiral polymer substrate, forms a supramolecular chiral film based on stereodirectional supramolecular assembly, and obtains a chiral hydrogel electrolyte after swelling and saturation in an aqueous electrolyte; the chiral guest molecules reshape the topological network of the polymer as topological guests, form a stereodirectional network, and make the energy storage modulus of the gel jump, so that the gel has the ability to resist dendrite penetration; at the same time, the chiral guest molecules can realize interface stabilization of the negative electrode and further inhibit the negative electrode dendrite; in addition, the stereodirectional network can greatly limit the activity of free water molecules and eliminate the corrosion of free water molecules on the vanadium positive electrode and vanadium dissolution.

This invention belongs to the field of asymmetric catalysis technology, specifically relating to an involute chiral polymer, its preparation method, and its applications. The preparation method of the involute chiral polymer includes the following steps: dissolving a trimesinamide derivative and trimesinylpyridinamide, ultrasonically dispersing, stirring to obtain co-assembled micelles, adding a crosslinking agent, stirring the reaction, centrifuging, washing the precipitate, and drying to obtain the involute chiral polymer. The involute chiral polymer obtained by this invention possesses nanocavities and a coiled structure, which can effectively improve the catalytic conversion rate and stereoselectivity in asymmetric catalytic reactions, solving the problem that chiral catalysis struggles to simultaneously achieve both reaction rate and selectivity. Furthermore, the preparation method of this invention is simple and easily controlled, and the obtained involute chiral polymer exhibits high structural stability, showing promising industrial application prospects in asymmetric catalysis, chiral resolution, and selective adsorption.

The invention belongs to the technical field of chiral polymer chemistry and luminescent functional materials, and particularly relates to a method for regulating and controlling the performance of a salicylaldehyde Schiff base chiral polymer, which comprises the following steps: fully reacting chiral amine with a monomer compound at 30-100 DEG C according to a molar ratio of 1: 1 to obtain a straight-chain salicylaldehyde Schiff base chiral polymer; the monomer compound is any one of a monomer A, a monomer B and a mixture of the monomer A and the monomer B, the monomer A is a 4, 4 'type binary 2-hydroxybenzaldehyde compound monomer, and the monomer B is a 5, 5' type binary 2-hydroxybenzaldehyde compound monomer. On the basis of controlling the molar ratio of chiral amine to the total amount of the binary 2-hydroxybenzaldehyde compound to be 1: 1, regulation and control of the photophysical performance and the chiral performance of the straight-chain salicylaldehyde Schiff base chiral polymer can be realized by changing the feeding ratio of the 4, 4 'type monomer to the 5, 5' type monomer.