19 results about "Salicylaldehyde" patented technology

The application belongs to the field of organic chemistry, material science and corrosion engineering, and discloses synthesis and application of a corrosion inhibitor based on rhodamine 6G. The fluorescent corrosion inhibitor LDS is obtained by synthesizing rhodamine 6G and hydrazine hydrate through a Schiff base reaction and salicylaldehyde. The corrosion inhibitor LDS not only has an inhibiting effect on carbon steel, but also can realize detection functions of corrosion iron ions and environment pH through a fluorescent signal, and further early warning of metal corrosion.

The application discloses a Schiff base catalyst, a preparation method thereof and a preparation method of allyl glycidyl ether. The Schiff base catalyst comprises a Schiff base ligand and a central metal ion, wherein the Schiff base ligand is a condensate of ethylenediamine, one molecule of 3,5-di-tert-butyl salicylaldehyde and one molecule of 5-tert-butyl salicylaldehyde, and the central metal ion is selected from any one of Sn, Al and Fe. The Schiff base catalyst can efficiently catalyze the ring opening of allyl alcohol and epichlorohydrin, and the reaction period can be compressed to 3 hours. Meanwhile, the asymmetric structure of the Schiff base complex can effectively control the ring opening position of epichlorohydrin, improve the ring opening selectivity, and the methylene ring opening selectivity can be up to 99%.

The invention provides a negative photosensitive resin composition which can obtain a cured film with high visible light shielding property even if a colorant such as carbon black is reduced. The invention also provides a cured film and a resist film. A negative photosensitive resin composition containing the following components (A)-(C): (A) a novolac phenolic resin in which the molar ratio [(a1): (a2): (a3): (a4)] of a structural unit (a1) derived from cresol, a structural unit (a2) derived from dihydroxynaphthalene, a structural unit (a3) derived from benzaldehyde, and a structural unit (a4) derived from salicylaldehyde is 1: (0.25-4.0): (0.25-4.0): (0.25-4.0); (B) a photosensitizer; and (C) an organic solvent.

The present application relates to a kind of small molecule probes and its preparation method and application, the chemical structure of the probe is as shown in the following formula: Wherein, R1 is 1-propyl sulfonic acid or 1-butyl sulfonic acid;R2 independently selected from trifluoromethyl or sulfur pentafluoride group, the substitution position of R2 is the ortho, para or meta of hydroxyl on benzene ring;Preparation method is by the condensation reaction of salicylaldehyde containing fluorine substituent group and indoline, directly introduce containing fluorine substituent group into the spiro-pyran molecule structure with pH response, prepared with 19 F MRI and fluorescence imaging pH-responsive bimodal imaging small molecule probe.Compared with the prior art, the small molecule probe of the present application exhibits significantly different 19 F NMR chemical shift and fluorescence intensity, high-resolution 19 F MRI imaging and fluorescence imaging, greatly improve the sensitivity and accuracy of imaging, has important application prospect in the field of biosensing, cell imaging, medical diagnosis etc.

The application discloses a kind of heart tonic tablet fingerprint spectrum detection methods, belong to traditional Chinese medicine detection technical field.The technical scheme includes: to system applicability solution, reference solution, medicinal material solution, test solution are detected by high performance liquid chromatography, obtain chromatogram;According to the chromatogram obtained in S5, determine the chemical composition of each chromatographic peak in the fingerprint spectrum, respectively 3 peaks of calycosin-7-glucoside, 4 peaks of 4-methoxy salicylaldehyde, 6 peaks of salvianolic acid B, 9 peaks of tanshinone I, 10 peaks of cryptotanshinone, 12 peaks of tanshinone IIA;According to the chromatogram obtained in S5, determine the source of each chromatographic peak in the fingerprint spectrum.The application is applied to heart tonic tablet detection aspect, solves the determination of only tanshinone IIA under the content item of existing heart tonic tablet current quality standard, control index is single, thus cannot comprehensively reflect the overall quality level of preparation problem, with the characteristics of accurate, stable and reliable detection result.

A preparation method for salicylamine acetate, comprising preparing an amino-protected intermediate from salicylaldehyde, and reacting the intermediate with acetic acid to prepare an acetate.

The application discloses a thin cold laminating material and a preparation process thereof, and belongs to the technical field of cold laminating materials. The thin cold laminating material comprises a base film layer, a release layer coated on the base film layer, an imaging layer coated on the release layer, an aluminum plating layer plated on the imaging layer, and a protective glue layer coated on the aluminum plating layer. The imaging layer raw material components comprise butanone, ethyl acetate, an imaging layer resin base, and color powder. The imaging layer resin base is obtained by copolymerization of methyl methacrylate, hydroxyethyl methacrylate, an unsaturated stabilizer tri (allylbenzene) imidazoline, and 2,4,6-tri (2-allylphenoxy) -1,3,5-triazine. The release layer raw material components comprise tetraethyl orthosilicate, octaphenylcyclo tetrasiloxane, tetra-vinyl tetramethyl cyclo tetrasiloxane, dimethyl siloxane mixed ring, n-heptane, and 3,5-di-tert-butyl salicylaldehyde. The protective glue layer comprises methyl methacrylate, hydroxyethyl methacrylate, butyl acrylate, dimethylbenzene, and glycidyl acrylate.

This invention relates to the field of ceramic glaze technology and discloses an antibacterial glaze for ceramic products and its preparation method. The raw materials of the antibacterial glaze of this invention include 30-38 parts by weight of potassium feldspar, 26-40 parts by weight of quartz, 3-8 parts by weight of calcite, 2-4 parts by weight of alumina, 2-3.5 parts by weight of zirconium silicate, 1-3 parts by weight of dolomite, and 0.5-3 parts by weight of diatomaceous earth-loaded silver antibacterial agent. The modified diatomaceous earth contains a large number of hydroxyl groups, carboxyl groups, and multiple salicylaldehyde Schiff base structures, which have a strong coordination complexing ability for silver ions. It can uniformly load a large number of silver ions onto the surface of diatomaceous earth, improving the loading and dispersibility of the silver antibacterial agent. When added to the ceramic glaze, it endows the glaze with excellent antibacterial properties and has good practical applications in antibacterial ceramics and ceramic products.

This invention discloses a dibenzylamine-bridged DASA molecular switch for salicylaldehyde hydrazone and its preparation method. The DASA molecule has the structure 4-((benzyl((1E,3Z)-5-(1,3-dimethyl-2,4,6-trioxotetrahydropyrimidine-5(2H)-ylidene)-4-hydroxypentan-1,3-dien-1-yl)amino)methyl)-N′-((E)-2-hydroxybenzylene)benzoylhydrazide, which is prepared by reacting the donor (E)-4-((benzylamino)methyl)-N′-(2-hydroxybenzylene)benzoylhydrazide with the acceptor 5-(furan-2-methylene)-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione in methanol. Its advantages include: exhibiting excellent negative photochromic behavior in moderately strong aprotic polar solvents such as dichloromethane and acetonitrile; undergoing reversible linear-ring isomerization under visible light irradiation; showing significant changes in absorption peaks; and exhibiting good cyclic fatigue resistance. Furthermore, the introduced salicylaldehyde hydrazone group enhances its responsiveness to acids, bases, and metal ions, enabling reversible switching in various protic and aprotic solvents and selective recognition of different metal ions, thus showing broad application prospects in colorimetric sensing and metal ion detection.

This invention discloses a method for preparing a Zr-MOF catalyst containing a Co single-atom site, belonging to the field of metal-organic framework synthesis and advanced oxidation catalysis technology. First, mesoporous Zr-MOFs (NKM-508) are prepared via a solvothermal method using H4TCPB-CH3 ligand and ZrCl4. Based on NKM-508, N,O coordination sites are constructed through aspartic acid amino modification and salicylaldehyde Schiff base reaction, ultimately anchoring a Co single atom to obtain the NKM-508-Co catalyst. This catalyst exhibits good stability, can efficiently activate potassium persulfate (PMS) to generate reactive oxygen species, can rapidly degrade various azo dyes such as eosin Y, orange G, methylene blue, and rhodamine B, and demonstrates excellent recyclability.

This invention discloses a tetraphenylphenyl salicylate-based aniline Schiff base derivative, its preparation, and its applications. This derivative is prepared from 2-hydroxy-5-(1,2,2-triphenylphenyl)-benzaldehyde and aniline and its derivatives, and can be used as a photochromic material in the fields of data encryption and anti-counterfeiting. The preparation process of the tetraphenylphenyl salicylate-based aniline Schiff base derivative of this invention is simple, and its structure is novel. Utilizing its photoluminescent properties, it can be used in anti-counterfeiting and other fields, exhibiting characteristics such as a large color-changing range, short fading time, and stable properties.

The application provides a self-crosslinking organic electro-optic molecular glass material and application. The self-crosslinking organic electro-optic molecular glass material of the application introduces two different functional groups on a bridge and a donor respectively, the bridge being a 4-(diethylamino)salicylaldehyde donor, an isofuroxan electronic bridge and a CF3-TCF electronic acceptor chromophore, a chromophore molecule with a single-chromophore self-crosslinking function is synthesized, through a D-A crosslinking reaction between the functional groups, a high-chromophore-loaded nonlinear optical material with high electro-optic coefficient and high thermal stability is prepared without a small molecule or polymer crosslinking agent.

The application provides a preparation method of a Schiff base catalyst and a preparation method of polyglycolic acid. The method comprises the following steps: reacting a diamine monomer with excessive salicylaldehyde monomer to obtain a mixture of a Schiff base compound and salicylaldehyde monomers; further adding an amino alcohol monomer to react with the excessive salicylaldehyde monomers to generate alcohol substances, the alcohol substances can initiate glycolide polymerization; subsequently, reacting the mixture comprising the Schiff base compound and the alcohol substances with a metal compound to obtain a mixture of a Schiff base catalyst and alcohol substances. Compared with the existing technology, the preparation of the Schiff base compound and the Schiff base catalyst is completed in a "one-pot", without the need for multi-step purification treatment, the use of a large amount of organic solvents is avoided, the production process is greatly simplified, and the production cost is effectively reduced.

The application provides an olefin polymerization catalyst and a preparation method thereof. The preparation method comprises the following steps: mixing a terminal silicon ether aliphatic amine and a salicylaldehyde compound to perform a condensation reaction, so as to obtain an organic ligand; mixing the organic ligand and silica gel to perform an elimination reaction, so as to obtain an intermediate product A; mixing the intermediate product A and a tetraamine metal compound to perform a complexation reaction, so as to obtain an intermediate product B; and mixing the intermediate product B, a co-catalyst and phenolic aluminum oxide to perform an activation reaction, so as to obtain the olefin polymerization catalyst. The catalyst obtained by the method has high catalytic activity, high metal loading and low cost.

The present application relates to a Schiff base metal complex and a preparation method and an allyl epoxy-terminated polyether preparation method and application, and belongs to the technical field of fine chemical industry. The Schiff base metal complex comprises a Schiff base ligand and a central metal ion, wherein the Schiff base ligand is a condensate of phenylenediamine and 3,5-di-tert-butyl salicylaldehyde, and the central metal ion is selected from any one of Ti, Mn, Ni, Cu and Co. The present application utilizes the electron cloud density difference of the two double bonds of the methyl allyl and the allyl, and in the presence of the Schiff base catalyst, the methyl allyl double bond is selectively epoxidized by using meta-chloroperoxybenzoic acid, so as to obtain an allyl epoxy-terminated polyether with high epoxy termination rate, high double bond termination rate and no chlorine. The product has high termination rate, basically no chlorine residue, and has good reactivity, and can be used as a raw material of high-end ternary block silicone oil and for post-processing of baby clothing materials.

The present application belongs to zinc-nickel alloy plating layer, and particularly relates to an alkaline stripping solution for removing unqualified zinc-nickel alloy plating layer, a preparation method and application thereof. In order to safely and efficiently remove unqualified zinc-nickel alloy plating layer, the present application provides an alkaline stripping solution, which is composed of the following components in terms of mass concentration: main salt: NaOH 100-180 g / L; oxidizing agent: sodium nitrate 180-200 g / L and NaClO 10-20 g / L; complexing agent: salicylaldehyde oxime 30-50 g / L and diethylene triamine 30-50 g / L; corrosion inhibitor: 2-acetylpyrrole or 4-piperidine carboxamide 2-10 g / L; wetting agent: sodium dodecyl sulfate 0.5-1.5 g / L. After the components in the alkaline stripping solution are mixed in proportion, the alkaline stripping solution can be directly used for removing unqualified zinc-nickel alloy plating layer, the stripping rate reaches 0.6-1 um / min, and the stripping temperature range is wide without damaging the substrate.

This application relates to the field of water-soluble biomaterials, specifically disclosing a hydroxypropyl chitosan, its preparation process, and its applications. The preparation process of hydroxypropyl chitosan includes the following steps: dispersing chitosan in purified water, adding acetic acid under stirring to dissolve and purify, obtaining purified chitosan; adding the purified chitosan to a mixture of salicylaldehyde and 95% ethanol, reacting, filtering, and washing to obtain salicylaldehyde chitosan wet material; mixing the salicylaldehyde chitosan wet material with isopropanol, maintaining the pH at 10-13, adding propylene oxide / 1-chloro-2-propanol dropwise, reacting, filtering, and washing to obtain amino-protected hydroxypropyl chitosan; immersing the amino-protected hydroxypropyl chitosan in an HCl / ethanol solution to deprotect, dialyzing, and freeze-drying to obtain hydroxypropyl chitosan. The hydroxypropyl chitosan of this application has water solubility at all pH levels and a high amino retention rate, laying an ideal material foundation for subsequent medical, pharmaceutical, and cosmetic applications.