30 results about "Conjugated system" patented technology

The application discloses a kind of tetraphenyl ethylene-chalcone derivative preparation and its application preparation and its application.The structure is as follows: the method includes: 4-(1,2,2-triphenyl ethenyl) acetophenone, aldehyde derivative, sodium hydroxide (provides alkaline condition, pH=8.3~8.5), is placed in anhydrous ethanol, under the condition that heating temperature is 80 DEG C, reflux reaction 12h, after reaction is ended, the functional organic material is separated and purified.The functional organic material synthesized according to the above method has larger conjugated system, and has significant pressure-induced color change characteristics.The functional organic material disclosed in the application has low preparation cost, simple operation, simple method, and the material shows significant pressure-induced color change characteristics, can be applied to pressure-induced color change, luminescent material, printing and dyeing, color printing and anti-counterfeiting technical field.

The application provides a method for monitoring lipid oxidation tendency, and belongs to the technical field of fluorescent probe detection. The method utilizes the fluorescence characteristics of a BODIPY molecular probe, and through selecting a molecular probe with a specific structure, directional reaction occurs between the BODIPY molecular probe and oxygen free radicals generated by lipid oxidation at a specific pH value. The conjugated system of the BODIPY molecular probe is destroyed, the half-chlorin structure is broken, and the fluorescence color changes from red to blue-green. According to the change of the fluorescence color before and after the reaction, the visualization monitoring of the lipid oxidation tendency and spatial distribution is realized through fluorescence imaging.

The application provides a pyridinone compound and a preparation method and application thereof, and belongs to the technical field of compound synthesis.The pyridinone compound is (E)-5-[(hydroxyl methylene)amino]-1,2,3,6-tetrahydropyridine-2,3,6-trione, and the molecular formula is C6H4N2O4.The pyridinone compound of the application simultaneously contains a hydroxyl group, an imino group and multiple carbonyl functional groups in the structure, forms a unique conjugated system and hydrogen bond network, and has the potential to be used as a bioactive precursor or a functional material.The pyridinone compound with a purity greater than 95% and a yield greater than 94% can be obtained by using the preparation method of the application, the compound shows good performance in dyeing applications, not only expands the application range of the pyridinone compound, but also provides a new way for realizing high-value utilization of fermentation broth resources, and has the advantages of environmental protection and economic benefits.

The application discloses a preparation method and application of a hollow conjugated microporous polymer. It belongs to the field of photocatalytic organic synthesis and comprises the following steps: step S1, dispersing SiO2 nanosphere templates in a triethylamine solvent; step S2, adding 4,7-dibromo-2,1,3-benzothiadiazole, dichlorobistriphenylphosphine palladium and cuprous iodide; step S3, slowly adding a toluene solution of 1,3,5-triethynylbenzene; step S4, heating, stirring, washing, etching with a hydrofluoric acid solution, washing and drying to obtain the hollow conjugated microporous polymer. The hollow spherical structure of the hollow conjugated microporous polymer enhances light capture; high specific surface area and hierarchical pores promote mass transfer and active site exposure; the D-A type conjugated system constructed by BT units effectively narrows the band gap, expands the visible light response range and greatly improves the charge separation efficiency; and the all-organic composition makes the hollow conjugated microporous polymer environmentally friendly and relatively low in cost.

The application belongs to the technical field of organic electroluminescent materials, and discloses an organic metal compound and an organic electroluminescent device containing the same. By increasing a benzene ring on a quinoline ligand, the quinoline itself is a nitrogen-containing heterocyclic aromatic system with a short conjugation length. By introducing an additional benzene ring on the quinoline ring in a fused ring or substitution manner, the pi-pi conjugation system of the whole ligand is directly extended, the emission wavelength is precisely adjusted to the red light range, the emission wavelength of the red light material is optimized, the molecular rigidity is improved, the color purity and the light emission efficiency are enhanced, the molecular stability is increased, and the device life is prolonged. Meanwhile, because the benzene ring has a good spatial structure, the driving voltage is reduced. In addition, the organic metal compound provided by the application has a simple and efficient preparation process, and the obtained product has high purity.

This invention discloses a method and its application for controlling the bending degree of a two-dimensional cobalt four-coordinate conjugated compound on a three-dimensional tubular carbon material. The specific procedure involves ultrasonically dispersing a three-dimensional honeycomb-structured tubular carbon material in methanol, and dispersing the two-dimensional cobalt four-coordinate conjugated compound in methanol. The dispersion of the two-dimensional cobalt four-coordinate conjugated compound is slowly added dropwise to the dispersion of the three-dimensional honeycomb-structured tubular carbon material, while magnetic stirring. The solution is filtered and washed with methanol. Finally, the resulting solid is dried in a vacuum drying oven to obtain a composite structure of the two-dimensional cobalt four-coordinate conjugated compound and the three-dimensional honeycomb-structured tubular carbon material. This invention modifies the bending strain of the two-dimensional cobalt four-coordinate conjugated compound on the three-dimensional honeycomb-structured tubular carbon material by controlling the diameter of the tubular material. The preparation method is simple, efficient, environmentally friendly, and low-cost.

The application belongs to the technical field of functional pigments, and particularly relates to a preparation method of high-light-resistance composite pigments. The preparation method of the application is that: after pretreatment and cleaning, hexagonal boron nitride is obtained to be modified boron nitride nanosheet, and then the modified boron nitride nanosheet is compounded with organic pigments to obtain ideal high-light-resistance composite pigments. The modified boron nitride nanosheet used in the application can be better combined with the organic pigments by using the principle of entropy increase, the rich electron boron-nitrogen plane of the hexagonal boron nitride and the aromatic conjugated system of the lithol red molecules produce pi-pi stacking interaction, and then the two are driven to self-assemble to form high-light-resistance composite pigments, and the high-light-resistance composite pigments form a structure that is compact. The high-light-resistance composite pigments obtained by the application still maintain the chemical structure and gloss of the original organic pigments, and have excellent stability and good light resistance, and the problem of poor light resistance of the organic pigments is solved.

The application discloses an organic metal iridium complex, a preparation method and a light-emitting material and an organic electroluminescent device, and relates to the technical field of organic electroluminescence. The organic metal iridium complex provided by the application increases a carbazole on a benzene ring. The rigid structure of the carbazole can improve a glass transition temperature (> 120 DEG C) and a thermal decomposition temperature (up to 455 DEG C), reduces phase separation during high-temperature processing, and the carbazole has a large conjugated system and strong intramolecular electron transfer characteristics, so that the starting voltage is reduced.

This invention relates to a class of dihydroxanthine chemiluminescent groups, their preparation methods, and applications. The dihydroxanthine chemiluminescent group developed in this invention, compared to the traditional phenolic dioxane chemiluminescent group which uses two rigid six-membered rings to fix the double bond conformation, exhibits a higher luminescence quantum yield and a longer emission wavelength. More importantly, it possesses a reactive aldehyde group, which, while maintaining high rigidity, extends the π-electron conjugated system, causing its emission wavelength to redshift to the near-infrared region. This allows it to be extended to chemiluminescence detection and in vivo imaging in small animal models.

The application belongs to the field of photocatalytic preparation of hydrogen peroxide, and relates to a quinoline type cyclized porphyrin group covalent organic framework material (TAPP-QN-COOH-COF) and a preparation method and application thereof. The material is synthesized through Schiff base reaction and Povarov reaction of tetraaminophenyl porphyrin, 2,5-dihydroxyterephthaldehyde and 4-ethynylbenzoic acid, forms a quinoline ring connected covalent organic framework, the hydroxyl on the connector forms intramolecular hydrogen bond with C=N in the quinoline ring, and the structural order and stability are enhanced. The porphyrin large pi conjugated system and the quinoline ring jointly act, drive efficient transmission of electrons in the framework, and improve the light-induced carrier separation efficiency. The obtained TAPP-QN-COOH-COF photocatalyst has good crystallinity, and the photocatalytic hydrogen peroxide production experiment shows that the hydrogen peroxide production rate of TAPP-QN-COOH-COF under ultraviolet lamp irradiation for 4 h reaches 2195.96 micromoles per gram ‑1 , and the yield uniformly increases with time, which exhibits high catalytic activity and stability. The method greenly synthesizes hydrogen peroxide under mild conditions by using light energy, and provides an efficient and safe new strategy for hydrogen peroxide production.

This invention discloses a butterfly-shaped NBS-COFs catalyst and its preparation method, belonging to the field of photocatalysis technology. Firstly, a butterfly-shaped thiophene sulfone-based precursor is reacted with a borate group via a Schiff base reaction to construct a covalent organic framework (BS-COFs) containing an electron-deficient component and a borate sulfone group. The methyl group provides the basis for the subsequent aldol condensation reaction. Secondly, a post-modification method is used to react the aldehyde group on the amino compound with the methyl group on the BS-COFs via an aldol condensation reaction, forming an NBS-COFs catalyst with an aminated, highly conjugated system and an electron-deficient structure. Thirdly, the lone pair electrons on the amino group are directionally anchored to the empty orbitals of Pt, thereby achieving high dispersion of Pt. The introduction of thiophene sulfone expands the light absorption range, and the planar structure facilitates the transport of photogenerated charges along the framework. The combination of thiophene sulfone and the electron-deficient component accelerates the separation and transport of photogenerated carriers, while the conjugated system avoids charge recombination. When used for photocatalytic water splitting to produce hydrogen, it exhibits excellent hydrogen production rate and stability, showing promising prospects in the field of photocatalysis.

This invention proposes a Fenton reagent, a polishing slurry, a polishing method for diamond substrates, and a diamond polishing sheet. The invention provides a Fenton reagent comprising a hydrogen peroxide solution and a ferrous salt-containing composition; the ferrous salt-containing composition comprises: a ferrous salt, a host molecule, and a guest molecule; the host molecule has a hydrophobic cavity structure, capable of encapsulating the guest molecule through non-covalent interactions, and exhibits chemical stability in the Fenton reaction system; the guest molecule has a conjugated π system and can coordinate with Fe. Using the Fenton reagent and abrasive particles of this invention as a polishing slurry, diamond is polished under visible light irradiation, ensuring that the Fe content in the polishing slurry is maintained. 2+ A stable concentration ensures a stable supply of hydroxyl radicals, resulting in a high-quality diamond surface.

This invention discloses a method for preparing TCPP / Emodin composite photocatalysts and their antibacterial applications, belonging to the field of pharmaceutical antibacterial medicine. Addressing the issues of drug resistance easily induced by traditional antibiotics in treating bacterial infections, performance defects in existing photocatalysts, and insufficient antibacterial capacity of single antibacterial materials, this invention leverages the advantages of tetracarboxyphenylporphyrin (TCPP)—strong visible light capture ability and low photogenerated electron-hole recombination rate—and complements emodin's π-conjugated system and its structural advantage of promoting carrier migration. The two are covalently linked through a chemical coupling mechanism involving EDC / NHS synergistic activation of the carboxyl group. Through steps such as dissolution, mixing reaction, dialysis purification, and freeze-drying, spherical TCPP / Emodin composite nanomaterials with a particle size of 100-500 nm are obtained. This composite material reduces the photogenerated electron-hole recombination rate and improves carrier migration efficiency, efficiently generating ROS under visible light irradiation, and exhibits excellent photodynamic antibacterial properties.

This invention relates to the field of photocatalytic materials technology, specifically to a polybenzoxazine aerogel microsphere photocatalyst, its preparation method, and its application. The invention uses γ-aminopropylmethyldiethoxysilane, phenol, and paraformaldehyde as raw materials to synthesize benzoxazine with Si-O-C bonds and a planar π-conjugated structure. Then, the benzoxazine monomer undergoes ring-opening polymerization, followed by an in-situ emulsion template gelation method to form a polybenzoxazine aerogel microsphere catalyst with a wrinkled surface structure. The planar π-conjugated system and the interaction of tertiary amine groups in the polybenzoxazine aerogel microsphere catalyst promote the adsorption and activation of O2, as well as the gradual proton and electron transfer, thereby achieving highly efficient H2O2 photocatalytic synthesis. The preparation method of the polybenzoxazine aerogel microsphere catalyst of this invention is simple, the raw materials are readily available, and the cost is low.

The present invention provides an ADA-type non-fullerene acceptor material having a deep HOMO level while extending the π-conjugated system, as well as a composition, film, photoelectric conversion element, and CMOS image sensor using this compound. [Solution] The compound of the present invention is represented by the following general formula (1). ADA ···(1) Each A is independently a group represented by any of (2a) to (2d) below, at least one of the two A's contains (2a) or (2b) below, and D is an electron-donating group consisting of 2 to 20 cyclic groups. [C1] TIFF2026116245000059.tif37170

The application provides an anisaldehyde hippuric acid molecular top and a preparation method and application thereof, and belongs to the technical field of detection of gibberellic acid liquid preparation. The anisaldehyde hippuric acid molecular top has a unique configuration of a rigid aromatic ring rotor and an amide bond flexible support shaft, can convert micro-viscosity changes into visual light signal output, and releases light signal intensity that regularly increases with the increase of micro-viscosity, so that the dilution degree of the gibberellic acid liquid preparation can be observed in real time and accurately controlled. The sensitive coefficient of the MBABG to viscosity is high (x=0.65), the conjugated system formed by the amide bond and the aromatic ring in the molecular structure of the MBABG gives the MBABG excellent chemical stability, the MBABG can resist the complex environment of multiple components such as thickening agents, surfactants and pH regulators in the gibberellic acid liquid preparation, and can exist stably for a long time.

This invention discloses a thiophene ring-rich covalent organic framework material, its preparation method, and its applications, belonging to the field of semiconductor photocatalytic materials technology. Using 1,3,5-tris[2-cyano-2-(4-aminophenyl)vinyl]benzene as the amine monomer and 2,5-di(thiophene-2-yl)terephthalaldehyde as the aldehyde monomer, a thiophene ring-rich LTP-COF material is prepared via a solvothermal reaction. This material forms a large-size conjugated system and abundant thiophene ring active sites, exhibiting strong visible light absorption, high photogenerated carrier separation and transport efficiency, and a photocatalytic hydrogen peroxide production rate in water reaching up to 4805 μmol / g. ‑ 1 h ‑1 The process conditions of this invention are mild, environmentally friendly, low-cost, and easy to scale up. The resulting material exhibits excellent catalytic activity, selectivity, and stability, significantly superior to existing covalent organic framework photocatalysts, and has significant application value in the field of photocatalytic green preparation of hydrogen peroxide.

The present invention aims to provide a resin composition which is a melt mixture of a near-infrared absorbing dye and a resin, and which can produce a molded body having good optical properties even when melt-molded. The present invention is a resin composition characterized by being a melt mixture of a resin and a cyanine dye and / or a squarylium cyanine dye, the cyanine dye being a compound containing a cation composed of a cyanine structure and an anion composed of tetra(pentafluorophenyl)borate, the cation composed of a cyanine structure having a specific structure or having a specific structure at at least one terminal of a polymethine skeleton, the squarylium cyanine dye being a compound having the following structure: at least one of the structures attached to the squarylium site contains a nitrogen-containing conjugated system composed of a five-membered ring and a six-membered ring; or, at least one of the structures attached to the squarylium site contains a nitrogen-containing conjugated system composed of a five-membered ring and a six-membered ring via one conjugated carbon.

The application discloses a thermochromic dye and a preparation and application thereof, and belongs to the technical field of fine chemical industry. The application firstly introduces amino groups into a fluoran dye structure by using the reaction between a lactone and an alkyl diamine with the fluoran dye as raw material; and then, the aldehyde amine reaction between the amino fluoran dye and phenolic hydroxyl benzaldehyde is utilized to prepare a lactam thermochromic dye. The application utilizes the characteristics that the phenolic hydroxyl in the structure of the thermochromic dye releases protons at low temperature and obtains protons at high temperature, and utilizes the flexibility of the alkyl chain in the structure of the alkyl diamine, so that the ring-opening and ring-closing reactions of the lactam structure in the fluoran dye structure are caused, the size of the conjugated system of the dye is adjusted, and the color change of the dye is realized.

This invention relates to a D-A-D structured NIR-II photothermal material, its preparation method, and its applications. Specifically, the photothermal material of this invention has a simple structure, is easy to synthesize, is easy to purify, and has a high yield. Furthermore, due to its large conjugated system, the molecular structure is stable and not easily degraded under NIR-II light irradiation. In addition, the photothermal material of this invention has excellent optical properties, good photothermal conversion efficiency, extremely low biotoxicity, and broad ultraviolet absorption in the 800-1000 nm range. Therefore, it has great application prospects in near-infrared photodynamic therapy and tumor treatment.

The application discloses a preparation method of a polymer organic positive electrode material with a sulfur-nitrogen bridging skeleton and application of the material in alkali metal-based batteries. The material is prepared by a palladium-catalyzed Buchwald-Hartwig cross-coupling reaction, and is copolymerized from a 6,13-dihydrophenanthroline unit and a bifunctional methylphenothiazine derivative. A typical example is named PDMPTZ. The polymer has a sulfur-nitrogen bridging skeleton structure, has high-density electrochemical active sites, an extended pi conjugated system and a fast anion transmission channel, and effectively overcomes the bottleneck of low ion transmission efficiency and poor rate performance of traditional organic positive electrode materials. The material can be used for preparing a positive electrode sheet, and exhibits a high working voltage of about 3.40 V and a high specific capacity of 149 mAh g ‑1 in a lithium dual-ion battery. After 500 cycles, the capacity attenuation rate is only 0.08%, and excellent cycle stability is exhibited. In addition, the synthesis process is simple, the yield is high (up to 82%), is suitable for alkali metal-based battery systems such as lithium ion batteries, and has a good industrial application prospect.

The application discloses a covalent organic framework material, a solid-phase microextraction probe and a preparation method and application thereof, and relates to the technical field of material preparation and component detection. The application adopts 3,3'-dihydroxydiphenylamine and 1,3,6,8-tetra(4-formaldehyde phenyl) perylene as synthetic monomers, and synthesizes Py-DHBD-COF through a solvothermal method. The synthetic material is coated on the surface of an acid-etched stainless steel wire through polyacrylonitrile glue, and a solid-phase microextraction probe modified with a Py-DHBD-COF coating is prepared. The Py-DHBD-COF coating forms hydrogen bonds, pi-pi stacking and hydrophobic interaction with psychotropic drugs through its pi conjugated system, imine bonds and hydroxyl groups, so that efficient and selective adsorption of various psychotropic drugs is realized. In combination with HPLC-MS / MS technology, the probe shows high sensitivity, a wide linear range and good precision in the detection of three kinds of psychotropic drugs.

This invention belongs to the field of conductive coating preparation technology, and relates to a long-cycle lithium battery conductive coating and its preparation method. A hydrothermal reaction is used to composite carbon nanotubes, functional fillers, and functional additives to obtain a ternary composite conductive agent. Then, the ternary composite conductive agent, polyvinylpyrrolidone, N-methylpyrrolidone, and a dispersant in a weight ratio of 30-40:60-80:100-120:2-4 are mixed uniformly to obtain the long-cycle lithium battery conductive coating. The functional additive particles contain a multi-layered core-shell structure, in which a carbon layer coated with titanium suboxide synergistically enhances electron transport, an alumina film coating effectively inhibits electrolyte corrosion, and a polyaniline network improves conductivity. During the preparation of the modified filler, fluorophenyl groups are introduced into the polythiophene backbone, which maintains the molecular π-conjugated system and forms intermolecular hydrogen bonds, promoting charge chain transport capabilities, thereby improving the material's conductivity, charge transport efficiency, and electrochemical stability.

This invention discloses a modified PTC composite material and its preparation method. It is prepared by compounding functionalized polyethylene, composite silicone resin, carbon nanotubes, and carbon black. During the blending process of functionalized polyethylene, composite silicone resin, carbon nanotubes, and carbon black, the furan in the side chains of the functionalized polyethylene can react with the maleimide (DA) structure on the composite silicone resin to form a three-dimensional reversible covalent network. This network can limit the irreversible re-aggregation of conductive fillers even when the matrix melts at high temperatures. Crosslinking treatment allows the composite material to maintain good room temperature resistance reproducibility after multiple cycles. Introducing pyrene groups into the branched arms of the composite silicone resin allows the large π-conjugated system of pyrene to undergo strong π-π stacking interactions with the surface of the carbon nanotubes, stabilizing the conductive network of the composite material. The flexible polysiloxane skeleton of the composite silicone resin can uniformly disperse external forces and thermal stress, avoiding microcracks induced by stress concentration and localized open circuits in the conductive network, thus increasing the service life of the material.

The present invention relates to the technical field of high-temperature energy storage dielectric films, and discloses a preparation method of a porphyrin cross-linker modified polyimide high-temperature energy storage dielectric film. Polyamic acid (PAA) precursor is obtained by condensing 4,4'-diaminodiphenyl ether (ODA) and pyromellitic dianhydride (PMDA), and introducing ultra-low content of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (TAPP) as a cross-linker. Cross-linked polyimide film (PCPI) is prepared by solution coating and gradient thermal imidization. The terminal amino groups of TAPP molecules form a covalent cross-linking network with PAA, and the porphyrin macrocycle π-conjugated system provides deep-level charge traps, significantly inhibiting high-temperature carrier migration. The breakdown strength of the optimal sample PCPI-0.1 reaches 475 MV / m at 200 °C, and the discharge energy density is 4.97 J / cm 3 , the charge-discharge efficiency is ≥85%. At the same time, it has a high glass transition temperature, high thermal stability, excellent cycle stability and film-forming uniformity. The solution coating process is simple to prepare, and the process conditions are simple and controllable, which is suitable for the batch production of high-temperature and high-energy storage polyimide dielectric films.

The application provides a kind of karyolin derived PAD4 inhibitor and its preparation method and application, belong to biological medicine technical field.The application is based on the strategy of changing N-terminal electron cloud density and expanding conjugated system, PAD4 inhibitor is developed to a series of small molecules with significant in vitro enzyme activity inhibition and TNBC cell killing ability by modifying chloroacetamidine skeleton, relevant anti-enzyme and anticancer cell activity are shown, and moderate preference for PAD4 enzyme is shown.The in vitro anti-TNBC cell proliferation activity research shows that the karyolin derived PAD4 inhibitor provided by the application is superior to the lead compound 7 in in vitro anti-TNBC cell proliferation activity and safety, and has improved pharmacokinetic characteristics.

he invention discloses a porphyrin-based metal coordination conjugated polymer, a preparation method therefor, and an application thereof in photocatalytic degradation of organic pollutants. The catalyst of the present invention has an 18π-conjugated skeleton, a nearly planar macrocyclic molecule, a stable rigid structure and a very stable highly conjugated system, so that the catalyst has excellent photoelectric conversion efficiency, a wide range of absorption spectra, strong redox capacity, and good chemical and thermal stability. A metal coordinated porphyrin acts as active center, a large number of derivatives can be derived, and the method has emerged as a promising alternative for the photocatalytic degradation of environmental pollutants and the like.