163 results about "Salicylaldehyde" patented technology

The invention belongs to the technical field of organic synthesis, and particularly relates to a salicylaldehyde hydrazone bridged organic boron photoinitiator as well as a preparation method and application thereof. The structural formula of the salicylaldehyde hydrazone bridged organic boron photoinitiator is as shown in formula I, wherein R is H or halogen atom; the salicylaldehyde hydrazone bridged organic boron photoinitiator has a vertical spatial configuration formed by a seven-membered ring and a six-membered ring. A framework of the salicylaldehyde hydrazone bridged organic boron photoinitiator has a unique vertical spatial configuration, generation of a spinning triplet state can be effectively promoted through orbital angular momentum regulation and control, and a more favorable excited state characteristic is provided for a photoinitiation process. The absorption wavelength and the emission spectrum of an LED light source are well overlapped, and high reaction activity can still be kept under the conditions of low irradiation intensity (lt, 60 mW / cm) and short exposure time (lt, 60 s). In addition, the preparation method of the salicylaldehyde hydrazone bridged organic boron photoinitiator is simple and efficient, the raw material cost is low, and the salicylaldehyde hydrazone bridged organic boron photoinitiator has a wide application prospect.

A volatile composition dispenser includes a reservoir comprising a volatile composition; and an evaporative surface in fluid communication with the reservoir. The volatile composition comprises a first fragrance material that is a meta-(C1-C4 alkoxy)salicylaldehyde, and the first fragrance material is present in an amount of at least 0.0005%, by weight of the volatile composition. A process of treating an environment with a volatile composition dispenser includes providing a volatile composition dispenser and providing the meta-(C1-C4 alkoxy)salicylaldehyde to the environment. A weight loss of the volatile composition over less than 11 days ranges from 7% to 20%.

The invention discloses quick heat-conducting precoated sand and a preparation process thereof, and relates to the technical field of precoated sand, the quick heat-conducting precoated sand comprises the following raw materials by weight: 100-105 parts of crude sand, 6-8 parts of a modified resin prepolymer, 2-4 parts of modified POE, 3.5-4.5 parts of a lubricant, and 3-5 parts of nano silicon nitride. The modified POE has a relatively strong high-temperature toughening effect on the modified resin prepolymer, can also form chemical crosslinking with the modified resin prepolymer, and has relatively strong compatibility with other raw materials in the precoated sand. The modified resin prepolymer is obtained by heating and ring-opening polymerization of a benzoxazine monomer obtained by reaction of 5-nitrosalicylaldehyde, 2, 4-bis (trifluoromethyl)-5-pyrimidinyl ethyl formate, paraformaldehyde, furfuryl amine and the like, the curing temperature of the modified resin prepolymer is reduced, the thermal stability is improved, and improvement of the high temperature resistance of the precoated sand is facilitated.

Embodiments of the present disclosure describe metal organic framework (MOF)-like composite material (MOFite) including a salicylaldehydate-based iron metal organic framework composition and graphite, a lithium-ion battery including a cathode and an anode including a salicylaldehydate-based iron metal organic framework composition and graphite, and a scalable synthesis methods for salicylaldehydate-based metal-organic frameworks (SA-MOFs), specifically Fe-Tp, and their applications in lithium-ion batteries (LIBs).

This invention provides a polynuclear metal cluster based on salicylaldehyde acetal-2-thiophenol ligand, its preparation method, and its application. The chemical formula of the polynuclear metal cluster is Co4(C 13 H9NOS)6·2CH3CN·CH3OH, where C 13 H9NOS is salicylaldehyde acetal-2-thiophenol, with Co forming a six-coordinate octahedral configuration with N, O, and S. The salicylaldehyde acetal-2-thiophenol ligand in the polynuclear metal cluster of this invention can effectively stabilize the active center of metallic cobalt, resulting in a polynuclear metal cluster with significant OER activity and broad prospects for practical applications.

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 discloses a high-load cobalt monatomic catalyst with a three-dimensional confinement structure as well as a preparation method and application of the high-load cobalt monatomic catalyst. A three-dimensional cyclodextrin-based covalent organic framework 3D-CD-COF, which is constructed by seven-(6-amino-6-deoxy)-beta-cyclodextrin (7ACD) and aromatic dicarboxaldehyde (terephthalaldehyde or 4, 4 '-biphenyl dicarboxaldehyde), is used as a carrier, multiple coordination sites are constructed through salicylaldehyde grafting, and high-loading anchoring of cobalt single atoms is realized; cobalt single atoms are uniformly dispersed in a three-dimensional intercommunicated pore channel in a CoN1O3 coordination form, the loading capacity reaches 13.0-14.0%, and a three-dimensional confinement structure can inhibit four-electron oxygen evolution side reaction. The catalyst has high hydrogen peroxide Faraday efficiency and high yield, compared with Co-CD without a three-dimensional confinement structure, the activity and selectivity are remarkably improved, and an efficient technical scheme is provided for electrochemical preparation of hydrogen peroxide.

The invention relates to the technical field of catalysts for synthesizing ethylene propylene rubber, and discloses a vanadium-based catalyst composition and a preparation method and application thereof.The vanadium-based catalyst composition comprises a vanadium catalyst, an organic aluminum compound and an activation accelerant, and the preparation method of the vanadium catalyst comprises the steps that a salicylaldehyde compound is dissolved with methyl alcohol or ethyl alcohol; and adding an organic amine compound while stirring, adding a vanadium compound after reaction, and continuously reacting to obtain the vanadium catalyst. When the prepared vanadium catalyst composition is applied to ethylene and propylene copolymerization reaction, the reactivity rate of ethylene and propylene monomers can be adjusted according to the structure of the vanadium catalyst, the C3 content of the prepared ethylene propylene rubber is 26.2-36.4 wt%, the double bond content of ethylene propylene diene monomer is adjustable in the range of 3.7-15.2 wt%, and post-processing application is facilitated.

Embodiments of the present application provide a method for preparing a hydroxyl ortho-hydroxymethyl-substituted methylene-bridged substituted phenol, the method comprising the following steps: A1, reacting a substituted phenol with formaldehyde in the presence of a Lewis acid catalyst to prepare a substituted salicylaldehyde compound (2); A2, condensing the substituted salicylaldehyde compound (2) in a system containing formaldehyde and a Brønsted acid catalyst to prepare a methylene-bridged substituted salicylaldehyde compound (3); A3, reducing the methylene-bridged substituted salicylaldehyde compound (3) to prepare a hydroxyl ortho-hydroxymethyl-substituted methylene-bridged substituted phenol (4). Embodiments of the present application can improve the yield and chemical purity of the prepared hydroxyl ortho-hydroxymethyl-substituted methylene-bridged substituted phenol. According to other embodiments of the present application, a method for preparing a polyphenol compound containing multiple phenol units is also provided.

The application discloses a kind of multiple stimulus response type Zn (II) -DASA complex molecular switch and preparation method and application thereof.The Zn (II) -DASA complex molecular switch is prepared by grafting DASA ligand with salicylaldehyde acylhydrazone and ZnCl2 in methanol, and crystal is obtained by solution evaporation method.The Zn (II) -DASA complex molecular switch of the application exhibits multifunctional switching characteristics of solid-state light, heat and water-induced color change and fluorescence emission, and has wide application prospect in the field of information storage medium such as photo-thermal color-reproducible erasable material, intelligent display material or anti-fake encryption material.

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 invention relates to a fluorescent probe based on substituent group type and position effect as well as preparation and application of the fluorescent probe. The preparation method comprises the following steps: firstly, carrying out quaternization on pyridine with an electron withdrawing group in acetonitrile to generate pyridinium salt; then, by taking ethanol as a solvent and ammonium acetate or piperidine as a catalyst, carrying out catalytic condensation reaction on the aldehyde group of the salicylaldehyde or the derivative thereof and the methyl group of the pyridinium salt; through the two-step reaction, a target product with a D-pi-A structure can be efficiently obtained. Accurate structural design and controllable synthesis of organic molecules are focused, different substituent groups are introduced into a D nucleus and an A nucleus of a traditional D-A structure respectively, meanwhile, the positions of the substituent groups on a phenol group are adjusted, and the emission wavelength of the fluorescent molecules is adjusted and controlled by adjusting and controlling electron cloud distribution and conjugate length. The raw materials are low in cost and easy to obtain, convenient and efficient large-scale preparation can be achieved, the production cost can be remarkably reduced, and energy consumption can be reduced.

The preparation method of the fluorescent probe (S) comprises the following steps: adding absolute ethyl alcohol into p-phenylenediamine, refluxing and dissolving the solution (solution A) while heating at 80 DEG C, dissolving salicylaldehyde into a proper amount of absolute ethyl alcohol (solution B), dropwise adding the solution B into the solution A, and stirring to obtain a mixed solution; heating reflux is kept at 80 DEG C in the whole process, stirring is continuously carried out, and after reflux is carried out for 2 hours, filtering is carried out to obtain a faint yellow solid, namely the fluorescent probe (S). The fluorescent probe can specifically recognize hydrogen sulfide (H2S) under the interference of common ions, is strong in anti-interference capability and high in sensitivity, and can be used for real-time monitoring and fluorescence imaging of endogenous H2S of cells and mouse tumors.

The invention relates to the technical field of organic synthesis, and discloses a synthesis process of salicylaldehyde. The process sequentially comprises three core stages: firstly, performing mechanochemical ball milling pretreatment on phenol, a catalytic complexing agent and a molecular sieve drying agent in an inert atmosphere; then, transferring the pretreated mixture into a reactor containing a composite solvent of sulfolane and ionic liquid [BMIM] PF6, and dropwise adding a hexamethylenetetramine solution under programmed temperature control to perform formylation reaction; and finally, cooling the reaction liquid, filtering, hydrolyzing the filtrate by using a phosphoric acid aqueous solution with gradient concentration, and separating the product in real time through azeotropic distillation. According to the process, mechanical activation, composite solvent and programmed reaction are combined, the process is continuous, and the reaction efficiency and selectivity are improved.

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 relates to the technical field of polypropylene, and discloses a nano high-efficiency antibacterial polypropylene material and a preparation method thereof.The preparation method comprises the steps that polypropylene is subjected to melt grafting through 4-vinylaniline salicylaldehyde Schiff base, then the polypropylene is blended with nano silver, polypropylene and polystyrene, and the nano high-efficiency antibacterial polypropylene material is obtained. In the mixing process, the grafted polypropylene contains a salicylaldehyde Schiff base structure and forms a coordination effect with the surface of the nano-silver, so that the surface of the nano-silver is coated with the grafted polypropylene, the dispersion effect on the nano-silver is realized, and the agglomeration problem of the nano-silver is favorably improved. The diameter of an inhibition zone and the antibacterial property of the polystyrene-polypropylene material are improved. The grafted polypropylene improves the compatibility of polypropylene resin and polystyrene resin, forms a plastic alloy system with better mechanical properties, and has higher tensile strength and bending strength.

The invention discloses a metal-Salen complex functionalized graphene-based composite material as well as a preparation method and application thereof, and belongs to the technical field of energy storage materials. The composite material takes graphene oxide as a substrate, a Salen type ligand skeleton is grafted through a covalent bond, and a metal active center with an M-N2O2 structure is coordinated on the Salen type ligand skeleton. The preparation method comprises the following steps: carrying out amination on graphene oxide, carrying out Schiff base condensation on graphene oxide and salicylaldehyde to form a ligand, and carrying out coordination reaction on the ligand and metal salt. The composite material disclosed by the invention is coated on a commercial diaphragm and can be used for a lithium-sulfur battery. Through atomic-scale dispersed catalytic sites, effective interception and efficient bidirectional catalytic conversion of polysulfide are synergistically realized, uniform deposition of lithium ions can be guided to inhibit dendritic crystal growth, and the key problems of shuttling of polysulfide, slow reaction kinetics, negative electrode instability and the like in a lithium-sulfur battery are solved; and the rate capability, the cycle life and the safety of the lithium-sulfur battery are remarkably improved.

The invention relates to a preparation method of a multi-cross-linked hydrophilic copper (II) ion imprinted polymer, which belongs to the field of functional high polymer materials and comprises the following two steps: firstly, carrying out free radical copolymerization on an allyl tertiary amine salt modified salicylaldoxime copper (II) complex, a first tonality monomer, a first cross-linking agent and a water-based initiator in water, neutralizing after reaction, filtering and drying to obtain a second tonality monomer; a cross-linked polymer containing copper ions and tertiary amine groups is obtained; the preparation method comprises the following steps: firstly preparing a quaternary ammonium cation hydrophilic cross-linked polymer, then dissolving the quaternary ammonium cation hydrophilic cross-linked polymer in an organic solvent, reacting with an unsaturated alkylation reagent to generate a polymerizable quaternary ammonium cation hydrophilic cross-linked polymer, then adding a second tonality monomer, a second cross-linking agent and an initiator for secondary copolymerization, and finally preparing an imprinted polymer in a hollow resin ball, porous membrane or fiber form through a precipitation, membrane forming or spinning process. The solid-phase anion and cation dual-extraction agent for copper (II) ion imprinting and counter ions thereof is suitable for high-selectivity enrichment and deep extraction separation of copper (II) ions in various water systems, and has the function and characteristic of simultaneously extracting counter anions.

The application discloses a MALDI-FT-ICR mass spectrum probe for single-chain sphingolipid detection and a preparation method and a use method thereof, and relates to the technical field of analytical testing. The MALDI-FT-ICR mass spectrum probe for single-chain sphingolipid detection has the general structure of: the preparation method comprises the following steps: 4-pyridine propionic acid or pyridine 4-propenoic acid is reacted with salicylaldehyde or a salicylaldehyde derivative in a protective atmosphere. The use method comprises the following steps: different concentrations of sphingosine methanol solutions are prepared, the stock solution of the probe is added into each concentration of the sphingosine methanol solution, and a mixed solution is obtained; the mixed solution is mixed with a matrix methanol solution, is spotted on a target plate, is dried at room temperature, and then is subjected to MALDI analysis; and a standard curve is drawn with different concentrations of the sphingosine in the step S1 as the horizontal coordinate and the MALDI ion signal intensity of the product obtained in the step S1 as the vertical coordinate. The mass spectrum probe provided by the application has high sensitivity, low cost and high throughput.

The application discloses an aggregation-induced emission material with high fluorescence quantum yield and large stokes shift, a preparation method and application thereof, and belongs to the technical field of preparation of the aggregation-induced emission material. The preparation method comprises the following steps: obtaining an intermediate by means of Suzuki-Miyaura coupling reaction of an organic boric acid and bromosalicylaldehyde; and adding the intermediate, sodium metabisulfite and aminophenylthiophenol into an organic solvent, and then performing high-temperature reaction to prepare the aggregation-induced emission material. The aggregation-induced emission material is synthesized by means of a two-step method, can be rapidly and mass-produced, and has the advantages of high fluorescence efficiency, large stokes shift, good stability and the like.

The invention relates to the technical field of rubber pads, in particular to a coupling rubber pad and a preparation method thereof.Copolymerized epichlorohydrin rubber and homopolymerized epichlorohydrin rubber are compounded to serve as a rubber pad base material, compound rosin is introduced to serve as a tackifier, an acrylate group is introduced into rosin, hydrogenated rosin-based acrylate is obtained, copolymerization is initiated through light, and the coupling rubber pad is prepared. Grafting double-bond terminated poly (carbamate-urea) and 3-acrylamido phenylboronic acid to obtain composite rosin; due to the introduction of double-bond terminated poly (carbamate-urea), the rubber pad has certain self-repairability, and the durability and fatigue resistance of the rubber pad are improved; 3-acrylamido phenylboronic acid is introduced, so that the biocompatibility of the rubber pad is improved; carbon black is subjected to modification treatment, the carbon black is subjected to double bond treatment through vinyl trimethylsilane, then a salicylaldehyde derivative containing double bonds and ammonium is grafted through light click, modified carbon black is obtained, and therefore the service life of the coupling rubber pad is prolonged.

This invention discloses a supported bifunctional catalyst for the synthesis of CO2-based polycarbonate polyols and its preparation method. First, N-methylimidazolium tert-butylsalicylaldehyde is reacted with 3,4-diaminopyridine to obtain a Schiff base ligand, which is then coordinated with cobalt to obtain a Schiff base metal cobalt complex. Finally, this complex is reacted with chloromethyl polystyrene resin to generate a supported bifunctional Schiff base metal catalyst. When this catalyst is used for the thermocatalytic polymerization of CO2-based polycarbonate polyols, the reaction requires no co-catalyst, the polymerization reaction is relatively mild, carbon dioxide utilization is high, and the generated carbonate fragments reach over 94%; simultaneously, there is no catalyst residue, and the polymerization product is essentially colorless.

The application relates to the field of functional polymers and noble metal recovery, and discloses a preparation method of a composite material capable of selectively recognizing palladium ions; plant fibers are used as substrates, free radical photoinitiators are first impregnated, and then a double-bond-containing salicylaldehyde ionic liquid monomer is subjected to photo-induced graft polymerization on the surface of the fibers under the irradiation of inert gas and ultraviolet light to obtain a fiber intermediate grafted with an ionic liquid polymer; then, the fiber intermediate is subjected to dehydration condensation with aminothiourea in an organic solvent under the action of an acidic catalyst to prepare a fiber-based composite material of an aminothiourea probe type; when the material is contacted with Pd 2+ in a pure water phase, the material changes from light yellow to brown, quantitative detection of Pd 2+ can be realized, and the detection limit reaches 0.096 micromoles / L; the maximum adsorption capacity of the material for Pd 2+ reaches 100.83 mg / g; when multiple ions coexist, the Pd 2+ clearance rate of the material is higher than 98%, the interference ion clearance rate is lower than 1.1%, and the material has the dual functions of high selectivity and visual detection and high adsorption.

The invention discloses a preparation method and application of a functionalized mesoporous material SBA-15, and relates to the field of chemical synthesis and photoelectrocatalysis materials.Organic functionalization is conducted on SBA-15 through a grafting method, and an amino-functionalized mesoporous material NH2-SBA-15 is obtained; and carrying out salicylaldehyde functionalization treatment on the amino functionalized mesoporous material NH2-SBA-15, so as to obtain the salicylaldehyde functionalized mesoporous material S-SBA-15. The functionalized mesoporous material NH2-SBA-15 and the functionalized mesoporous material S-SBA-15 can be used for photoelectrocatalytic reduction of CO2, and have good photoelectrocatalytic activity and stability.

The application provides a double metal Schiff base complex, a preparation method thereof and application of the double metal Schiff base complex in catalyzing synthesis of cyclic carbonate. A tetraamine benzene compound containing a substituent group and a salicylaldehyde compound containing a substituent group are dissolved in an organic solvent A, a metal source MZ is added, an organic acid B is added as a catalyst, and the reaction is heated to reflux to obtain the double metal Schiff base complex. The double metal Schiff base complex prepared by the application can weaken the problem of self-polymerization of an active center to a certain extent by adjusting the overall electron cloud density through an X group. The double metal Schiff base complex is used as a catalyst for preparing a cyclic carbonate by reacting carbon dioxide with an epoxide compound, and the catalyst has high activity, good selectivity and is easy to separate from the product; the reaction condition is mild and the process is simple. Moreover, the application can realize one-step production, is simple to prepare and can realize large-scale production.

Compositions, such as consumer products and / or fragrance / flavor compositions, comprising a meta-(C1-C4 alkoxy) salicylaldehyde, such as ortho-ethyl vanillin. Processes for making and using such compositions.

The present invention provides a catalyst for synthesizing a cyclic carbonate and a preparation method and use thereof. A diamine compound X, a salicylaldehyde-containing compound and a metal source M are subjected to reaction, and then added with a phenothiazine compound Y for continuous reaction to obtain a phenothiazine metal Schiff base catalyst. The formation of phenothiazine free radicals by phenothiazine compounds with a central metal can protect the central metal in the course of reaction and inhibit inactivation caused by the self-polymerization of the central meta, thus improving the activity and stability of a catalyst. Phenothiazine compounds can be present as a polymerization inhibitor to inhibit the generation of by-products such as polycarbonates and polyethylene glycol and enhance the selectivity of the catalyst during the reaction. The phenothiazine compounds are alkaline and can adsorb and activate carbon dioxide during reaction, which helps to improve the reaction efficiency. The phenothiazine metal Schiff base catalyst prepared in the present invention has high activity, strong stability and good selectivity and thus, can achieve the efficient catalyzed synthesis of cyclic carbonates under mild conditions.

The present application relates to a kind of N-adamantyl benz [1,3] oxazin-2-ketone derivatives and its preparation method and application in antibacterial, belong to organic synthesis and application technical field.N-adamantyl benz [1,3] oxazin-2-ketone derivatives have as shown in structure general formula (I).Preparation method includes: with adamantylamine reduction Schiff base of guaiacol as raw material, with dichloromethane as reaction solvent, CDI is added, under reflux condition, the oxazinone product corresponding to the reduction Schiff base is prepared.Extract the reaction liquid with deionized water until the pH of organic phase is 7, dry, rotary evaporation, obtain target product.The present application applies N-adamantyl benz [1,3] oxazin-2-ketone derivatives to biological antibacterial, it is shown that staphylococcus aureus, escherichia coli, pseudomonas aeruginosa all have certain inhibitory effect.

The invention provides a positive photosensitive resin composition, a resist film, a resist underlayer film, and a resist permanent film. The invention provides a positive photosensitive resin composition which is capable of obtaining a resist film with excellent developability, chemical resistance and heat resistance, and has good storage stability and thick film forming property. A positive photosensitive resin composition containing the following components (A) to (D): (A) a novolac phenolic resin having an acetal group-based protecting group, containing a phenol structural unit (a1) derived from m-cresol and / or o-cresol and an aldehyde structural unit (a2) derived from salicylaldehyde / (B) a polyhydroxystyrene having an acid-dissociable protecting group / (C) a photoacid generator / (D) a solvent.

The application relates to the technical field of titanium dioxide, and discloses a preparation process of surface-modified porous titanium dioxide and application thereof. The porous titanium dioxide has a large number of pore structures, a large specific surface area, and many adsorption sites, and is grafted with a hydroxyl-containing histidine-based polyamide containing a salicylaldehyde Schiff base structure, an imidazole structure and a polyamide structure, can have a strong coordination with Pb 2+ , Hg 2+ , and thus has excellent adsorption performance. 3,3'-diamino-benzidine is used as a polymerization monomer, the benzidine structure has heat resistance, the benzidine structure is introduced into the main chain of the polyamide after polymerization, the polyamide has excellent high-temperature resistance, the polyamide molecular chain does not pyrolyze at high temperature, the surface-modified porous titanium dioxide adsorbent still has high adsorption efficiency, and the surface-modified porous titanium dioxide adsorbent can meet the actual application of the adsorbent in the treatment of wastewater in a complex system such as high temperature.