72 results about "Biphenylamine" patented technology

The invention discloses a method for detecting tripolycyanamide based on nanogold mimetic peroxidase. Nanogold stimulates the change of the activity of the peroxidase after being interacted with tripolycyanamide, hydrogen peroxide is catalyzed by nanogold to oxidize 3,3',5,5'-tetramethylbenzidine dihydrochloride so as to be conducted for color development, therefore, the change of the color of a solution and the characteristics of an ultraviolet absorption spectrum are shown. The detection limit of the visual observation is 0.02mg/L. The linear range detected by the optical density is 5-80 mug/L, and the detection limit is 1.2 mug/L. The content of tripolycyanamide in a milk powder sample can be detected well by the method after being simply preprocessed.

The invention relates to a composite material of core/shell structure having covalent organic framework, wherein the composite material is formed by coating a core, formed from a magnetic particle, with a shell, formed from the covalent organic framework material, a core having a structure of Fe3O4 particles coated with a polydopamine layer, wherein the particle is modified by amino-containing alkoxysilane so that -NH2 functional group is formed on the surface of the polydopamine layer; a shell structure being a reaction product of 3,3'-dimethoxybenzidine and trialdehyde phloroglucinol. The invention further relates to a preparation method and an application of the composite material.

This invention relates to a polyamide-imide precursor, a polyamide-imide obtained by imidizing the same, a polyamide-imide film, and an image display device including the film. The polyamide-imide precursor includes, in a molecular structure thereof, a first block, obtained by copolymerizing monomers including dianhydride and diamine, and a second block, obtained by copolymerizing monomers including an aromatic dicarbonyl compound and aromatic diamine. The dianhydride includes biphenyltetracarboxylic acid dianhydride (BPDA) and 2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), and the diamine includes bistrifluoromethylbenzidine (TFDB).

The invention discloses bovine serum albumin-platinum/bismuth composite nano material mimic peroxidase. A bismuth nitrate water solution is added into a bovine serum albumin-platinum nano material water solution; after the water solution is uniformly mixed with a phosphate buffering solution, the mixed solution is heated in a water bath; and ultra-filtration and water washing are carried out on the heated mixed solution to obtain the bismuth-bovine serum albumin-platinum composite nano material mimic peroxidase. The bovine serum albumin-platinum/bismuth composite nano material mimic peroxidase can be used for catalyzing hydrogen peroxide to oxidize 3,3',5,5'-tetramethylbenzidine dihydrochloride so as to develop the color; and the Michaelis constant on the 3,3',5,5'-tetramethylbenzidine dihydrochloride is 0.054mmol/L and the Michaelis constant on the hydrogen peroxide is 13.24mmol/L. Meanwhile, the mimic peroxidase has the advantages of acid and alkali resistance, high temperature resistance and high salt resistance, and has excellent room temperature stability.

A conductive ink comprises nanosilver particles, and adhesion promoters, in which no binders, such as polymers or resins, are used in the compositions. In one embodiment the adhesion promoters are oxydianiline and 4,4-(1,3-phenylenedioxy)dianiline.

The invention relates to a perovskite solar cell taking tetraphenyl biphenyl diamine derivative as a hole transport material. The battery adopts a p-i-n structure, and comprises ITO glass, a hole transport layer, a perovskite structure absorption layer, an electron transport layer and a back electrode, wherein the hole transport material adopted by the hole transport layer is a tetraphenyl benzidine derivative, four benzene rings on the periphery of the hole transport layer are functionalized by methoxy group and phosphonate, a firm chemical bond can be formed by the hole transport layer and ITO, and interface defects in contact with perovskite are effectively passivated. The battery is advantaged in that a high-quality perovskite film is prepared under the conditions of accurately controlling the water content and annealing in a specific atmosphere, so a perovskite solar cell device with excellent performance is obtained.

The invention belongs to the field of fluorescent probe preparation technology and application, and particularly relates to a fluorescent probe for detecting silver ions and 2, 4, 6-trinitrophenol. The preparation method comprises the step of synthesizing the fluorescent probe by taking quinaldine acid, 3, 3 '-diaminobenzidine and polyphosphoric acid as raw materials in one step. The fluorescent probe has good selectivity and visual color change on silver ions and 2, 4, 6-trinitrophenol, has detection limits of 1.36 mu M and 0.82 mu M respectively, can be used for identifying the silver ions and the 2, 4, 6-trinitrophenol respectively in environmental water bodies or soil such as tap water and river water, and has a good application prospect.

The invention discloses a preparation method of a modified azo yellow pigment derivative dispersant as well as a prepared derivative dispersant and application thereof. The preparation method comprises the following steps of: (1) dissolving 4-aminobenzene phosphonic acid into water, adding alkali and ketene dimer, and stirring, reacting and drying to obtain 4-acetoacetyl aminobenzene phosphonate; (2) adding 3,3-dichlorobenzidine into a hydrochloric acid solution, stirring, adding a nitrite solution and reacting to obtain a diazonium solution; (3) under a stirring state, adding acetoacetanilide and the 4-acetoacetyl aminobenzene phosphonate into an alkali solution, and dropping an acetic acid solution to obtain a coupling solution; (4) adding the diazonium solution into the coupling solution and coupling to obtain azo yellow pigment derivative color paste; and (5) adding fatty amine into the azo yellow pigment derivative color paste, and stirring, filtering, washing by water and drying to obtain a modified azo yellow pigment derivative dispersant product. When the dispersant is used, the added quantity of the dispersant occupies 5-15 weight percent of the quantity of azo yellow pigment.

The invention provides a compound based on biphenylamine. The compound has the following structural formula: the formula is shown in the description. The compound has relatively good thermal stability, high light-emitting efficiency and high light-emitting purity and can be applied to the fields of organic electroluminescent devices, solar cells, organic thin film transistors or organic photoreceptors; the organic electroluminescent device produced by adopting the compound based on the biphenylamine has the advantages of good electroluminescent efficiency, excellent color purity and long service life.

The invention discloses a new method for rapid label-free detection of cysteine (Cys), and the method is mainly based on detection of changes in UV absorbance value of 3,3',5,5'-tetramethylbenzidine (TMB) caused by addition of the cysteine in the 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of cobalt-doped carbon nanomaterials (Co-CNMs). The TMB usually changes in color in the presence ofhydrogen peroxide. The synthesized Co-CNMs have excellent catalytic properties, and can directly catalyze the TMB to change into blue, after sulfuric acid is used to stopping, the color turns yellow,the catalytic activity of the Co-CNMs can be inhibited by the addition of the cysteine, decrease in the UV absorbance value of the TMB is caused, and the decrease in the UV absorbance value of the TMBis linearly related to the concentration of the added cysteine. The hydrogen peroxide is easy to decompose and unstable in nature. The method avoids the use of the hydrogen peroxide and can greatly improve the accuracy of test results. The method is very simple, has strong specificity, good stability and fast detection speed, and can meet the requirements of rapid and accurate on-site detection.

The present disclosure is directed to multiplex assays, kits and methods, including automated methods, for identifying PD-L1 positive immune cells, PD-L1 positive tumor cells, and PD-L1 negative immune cells within a tissue sample using two dyes selected from diaminobenzidine (DAB), 4-(dimethylamino) azobenzene-4′-sulfonamide (DABSYL), tetramethylrhodamine (DISCOVERY Purple), N,N′-biscarboxypentyl-5,5′-disulfonato-indo-dicarbocyanine (Cy5), and Rhodamine 110 (Rhodamine).

The polyamide acid according to the present invention contains 2,2-bistrifluoromethyl benzidine and trans-1,4-cyclohexane diamine as diamine components, and pyromellitic anhydride and 3,3,4,4-biphenyltetracarboxylic dianhydride as tetracarboxylic dianhydride components. The proportion of trans-1,4-cyclohexane diamine to the total diamine content is preferably 0.5 to 40 mol%. The polyimide is obtained through dehydration ring closure of the polyamide acid.

The invention discloses a preparation method of a self-crosslinking sulfonated polyimide film, which comprises the following steps: under the protection of nitrogen, adding m-cresol I, 1,4,5,8-naphthalenetetracarboxylic dianhydride and benzoic acid into a reactor, and stirring at room temperature until dissolution; adding 4,4'-diaminodiphenyl ether, 4,4',4'',4'''(5,5'-benzimidazole-2,2')-1,3-(phenylene)-tetraoxy tetraphenylamine, 2,2'-benzidinedisulfonic acid, triethylamine and m-cresol II into a vessel, stirring at room temperature until dissolution, then adding the materials in the vessel into a constant-pressure dropping funnel, dropwise adding into the reactor, stirring for reaction to obtain viscous fluid, pouring the viscous fluid onto a dry and clean glass plate, casting to form a film, and then drying to obtain a triethylamine salt type self-crosslinking sulfonated polyimide film; soaking the triethylamine salt type self-crosslinking sulfonated polyimide film in absolute ethylalcohol, then soaking the film in a sulfuric acid aqueous solution, and then washing the film to obtain the self-crosslinking sulfonated polyimide film. According to the invention, the problem of weakchemical stability of the sulfonated polyimide film can be solved in a targeted manner.

The invention relates to a composite gel solid electrolyte for a lithium ion battery and a preparation method thereof. The composite gel solid electrolyte for the lithium ion battery is prepared by compounding a lithium bis (trifluoromethylsulfonyl) imide composite polyimide gel precursor and a lithium-based gel precursor, wherein the lithium bis (trifluoromethanesulfonyl) imide composite polyimide gel precursor is prepared from the following components: 2, 2 '-dimethyl benzidine, 3, 3', 4, 4 '-biphenyl tetracarboxylic dianhydride, N-methyl-2 pyrrolidone, 3-aminopropyltrihexyloxysilane, lithium bis (trifluoromethanesulfonyl) imide and acetic anhydride; the lithium-based gel precursor is prepared from the following components: lithium perchlorate, glycerol, deionized water, polyacrylic acidand formamide. According to the composite gel solid electrolyte for the lithium ion battery, the longitudinal thermal shrinkage and the transverse thermal shrinkage can be reduced while the mechanical property and the puncture strength are maintained; the initial shrinkage temperature, the deformation temperature and the rupture temperature are effectively increased; meanwhile, the ionic conductivity and the lithium ion transference number are improved.

The invention relates to a fluorinion receptor compound and a synthesis method thereof. The method comprises the following steps: carrying out a heating refluxing reaction on o-tolidine and salicylaldehyde as substrates with ethanol as a solvent and acetate acid gracial as a catalyst, cooling to room temperature, carrying out pumping filtration, washing the above obtained solid, drying, and re-crystallizing to obtain the fluorinion receptor compound. When F<-> is added to a solution of the receptor compound, the color of the solution becomes yellow from colorless, and the identification process is not interfered by other ions. A fluorescence spectrum shows that the receptor compound can specifically identify the F<-> in a colorimetric and fluorescent high-selectivity manner, and the detection limit is 2.5*10<-7>mol/L.

The invention discloses a mercury ion colorimetric detection method based on osmium nanoparticle oxidase activity. According to the method of the invention, the heparin-modified osmium nanoparticles and mercury ions interact specifically to simulate the enhancement of oxidase activity, and the heparin-modified osmium nanoparticles sensitized by the mercury ions catalyze and oxidize the 3, 3 ', 5, 5'-tetramethylbenzidine hydrochloride to render color, the absorption value of the chromogenic system at the maximum absorption wavelength of 600 nm is increased along with the increase of the content of the mercury ions, the detection linear range of the mercury ions is 3-40 microns, the detection sensitivity is high, the detection limit of color change observed by naked eyes is 3 microns, and the detection limit of the detection of spectrophotometry is 220 microns. Osmium nanoparticles used for detection are easy and convenient to prepare and easy to obtain and have good stability; the mercury ion detection method constructed on the basis of the material can achieve visual and convenient analysis on mercury ions; and the method has the advantages of being easy and convenient to operate, short in detection time, high in sensitivity, high in specificity and the like and is easy to apply and popularize.

The invention belongs to the technical field of pigment yellow, and particularly relates to a preparation method of C.I. Pigment yellow 83, 3, 3 '-dichlorobenzidine and 3, 3'-dimethoxybenzidine are taken as dual nitrogen components, diazotization is carried out, and then coupling is carried out with 2, 5-dimethoxy-4-chlorodiacetanilide dispersed by high-substituted hydroxy propyl cellulose to obtain the pigment yellow 83. By utilizing the dispersity and chemical inertness of the high-substituted hydroxypropyl cellulose, the particle size of the product is uniform, the particles are soft, and the product has excellent light resistance, heat resistance, solvent resistance and migration resistance.

The invention discloses a design synthesis method and application of an electrochemical luminophor based on a covalent organic framework. The design synthesis method comprises the following steps: synthesizing an olefin-linked donor-acceptor completely conjugated covalent organic framework from an electron-deficient molecule 2,4,6-trimethylphenyl-1,3,5-triformonitrile and an electron-donating molecule tri-formyl-tribenzidine through condensation and cocrystallization; and coating the surface of a glassy carbon electrode with the covalent organic framework to prepare a modified electrode, and allowing an electron donor and an electron acceptor in the covalent organic framework to be separated and transferred under the action of an electric field, wherein a generated intramolecular electron transfer state activates the cathode electrochemiluminescence response of a non-electrochemiluminescence active monomer in a water-phase medium, and under the condition of not additionally adding a high-oxidability toxic co-reactant, high luminous efficiency is obtained. UO2<2+> can be selectively captured after further amido oximation, ECL signals are linearly enhanced, and accordingly, a signal-on type UO2<2+> electrochemical luminescence sensor is constructed, has the advantages of being wide in detection range, low in detection limit, good in selectivity and the like and can also be used for ultra-sensitive analysis of UO2<2+> in an environment water sample.

This polyimide includes an alicyclic acid dianhydride, a fluorine-containing aromatic acid dianhydride, and a 3,3',4,4'-biphenyltetracarboxylic acid dianhydride, as acid dianhydrides, and a 3,3'-diaminodiphenyl sulfone and a fluoroalkyl-substituted benzidine, as diamines. This polyimide film includes the abovementioned polyimide resin. The polyimide film can be obtained by applying, on a substrate, a polyimide solution obtained by dissolving the polyimide resin in an organic solvent, and removing the solvent.