193 results about "Pyridinium" patented technology

The invention discloses a preparation method and application of an oil-soluble heteropolyacid ionic liquid catalyst. The catalyst is composed of organic cations and inorganic anions, the cations are one of quaternary ammonium, imidazole and pyridine cations containing long-chain alkyl, the anions are heteropolyacid anions, the long-chain alkyl enables the catalyst to have good oil solubility, the catalyst can be efficiently dispersed in the waste grease, heteropolyacid provides active sites, and the catalyst can be used for treating the waste grease. Nano-scale active particles are formed after in-situ vulcanization, and the catalytic hydrogenation effect is achieved. The invention also provides a preparation method of the oil-soluble heteropolyacid ionic liquid catalyst, the catalyst can be prepared from tertiary amine and halogenated hydrocarbon through three-step reaction of alkylation, anion exchange and acid-base neutralization, the preparation process is simple, a highly toxic reagent is avoided, and the cost is low. The catalyst provided by the invention can be used for catalytic hydroisomerization of various waste oils and fats, has the characteristics of high conversion rate, low coking rate and high product calorific value, and has relatively high industrial application potential.

This disclosure provides redox cyclable molecules for energy storage. These molecules belong to either the 4H-pyran-4-ylidene family or include a six-membered aromatic ring with one nitrogen atom at position 1 (pyridinium family) or two nitrogen atoms at positions 1 and 4 (pyrazinium family) or at positions 1 and 3 (pyrimidinium family). Molecules in these families are used as analytes in redox flow batteries.

The invention discloses a pyridine quaternized cellulose derivative and a preparation method thereof, and belongs to the field of modified cellulose derivatives. According to the method, sodium carboxymethyl cellulose is taken as a raw material, and a target product is prepared through a three-step method of epoxy group grafting, sulfydryl-epoxy click chemical reaction and pyridine quaternization reaction in sequence. According to the method, the high efficiency of click chemistry and the modular design concept are innovatively introduced into the field of cellulose derivative modification, the problems that a traditional quaternization method is uncontrollable in substitution degree, many in side reaction and poor in molecular design flexibility are solved, and the method has the advantages of being mild in reaction condition, high in efficiency and clear in product structure.

The invention provides a diesel oil anti-wear agent and a preparation process thereof, and belongs to the technical field of diesel oil additives, and the preparation process comprises the following steps: mixing and stirring diisooctyl maleate and xylene, adding diethylenetriamine and deionized water, carrying out heating reaction, adding toluene, 4-(aminomethyl) pyridine and ethylene oxide, carrying out mixing reaction, filtering, washing, and drying to obtain the diesel oil anti-wear agent. The pyridinium-based polyester hollow capsule is prepared; the preparation method comprises the following steps: mixing xylene, catechol, ethylene phosphonic acid, ammonium persulfate and deionized water, heating, dispersing in cyclohexane, adding polyvinyl alcohol, octadecyl methacrylate and azodiisobutyronitrile, mixing and reacting to obtain catechol phosphonate nano colloidal particles; mixing and stirring the fatty acid ester solution, the oleoyl fluorocarbon copolymer and the pyridinium-based polyester hollow capsule, adding the catechol phosphonate nano colloidal particles, continuously stirring, performing ultrasonic treatment, and degassing to obtain the diesel oil anti-wear agent. The diesel oil antiwear agent can improve the antiwear property and demulsibility of the diesel oil antiwear agent.

The invention relates to a copper cluster scintillator constructed on the basis of diphenyl-2-pyridine phosphine and cuprous iodide and a preparation method and application of the copper cluster scintillator. The preparation method comprises the following steps: constructing a copper cluster scintillator by using diphenyl-2-pyridine phosphine and cuprous iodide, and preparing the copper cluster scintillator into a semitransparent scintillator film by using polyvinylpyrrolidone as a high-molecular polymer matrix and polyethylene glycol terephthalate as a spin-coating substrate; the scintillator film and a photomultiplier are optically coupled and integrated with nuclear electronics equipment to develop an alpha / beta particle pollution monitor. The copper cluster scintillator provided by the invention has excellent X-ray luminescence performance, and can realize high-sensitivity scintillation response to alpha / beta particles; the surface pollution monitor can realize sensitive detection of alpha / beta particles in the environment, and has important application value in the field of environmental radiation detection.

The invention discloses a photocurable pyridinium active monomer as well as a preparation method and application thereof. The preparation method comprises the following steps: adding diisocyanate, a solvent and a catalyst into a container, uniformly stirring, dropwise adding an alcohol compound, uniformly adding an acrylic monomer after stirring for reaction, and stirring for reaction to obtain isocyanate-acrylate; the method comprises the following steps: uniformly adding a pyridine monomer into isocyanate-acrylate, reacting for 2-4 hours, adding an alkylating reagent, reacting for 8-12 hours, and carrying out reduced pressure distillation separation to obtain the photocurable pyridinium active monomer. And uniformly mixing the photocurable pyridinium active monomer, the photoinitiator, the active diluent and the acrylate oligomer to obtain the 3D printing photosensitive resin. The method disclosed by the invention is sufficient in reaction, relatively simple in process and easy to implement, the photocurable pyridinium salt monomers with different functions can be designed according to material requirements, and the antibacterial and antistatic effects of the 3D printing material are good.

The invention discloses a fluorescent probe for targeting mitochondrial ferric ions as well as preparation and application of the fluorescent probe. The fluorescent probe is prepared by reacting cucurbit [7] uril with (E)-4-(4-(dimethylamino) styryl)-1-(3-(triphenylphosphonium) propyl) pyridine-1-onium bromide according to a molar ratio of 1: 1. The fluorescent probe can be used for detecting Fe < 3 + > ions, and has the characteristics of simple preparation method, convenience in operation, high sensitivity, high selectivity, low cost and rapidness in detection.

This invention relates to aggregation-induced emission probes with specific responses to tumor markers and their applications, belonging to the field of biochemistry. This invention utilizes molecular structure modulation to prepare a series of molecules possessing large Stokes shifts, resistance to photobleaching, near-infrared II (NIR-II) emission, and aggregation-induced emission properties. Different self-eliminating groups are attached to the dimethylamino group of the molecule via quaternization or to the pyridine group via pyridinium salting. By controlling the structure of these self-eliminating groups, activatable luminescent probes responding to different tumor markers can be constructed. These probes integrate deep NIR-II imaging, aggregation-point luminescence, large Stokes shifts, and marker-specific responses, providing a new approach for precise imaging diagnosis of tumors.

The invention discloses an application of a cyclochalcone cationic compound as a fluorescent dye in the field of pressing discoloration and detection of trace water or protonic solvents in solvents, the structural formula of the cyclochalcone cationic compound is shown in formula I. The monitoring of the trace water or protonic solvents in the solvents can be realized in the'opening 'process of a fluorescent signal of the dye; the dye fluorescence signal'closing 'phenomenon can be observed through grinding, and the process can be applied to the fields of stress detection, ink-free writing, anti-counterfeiting and the like. The dye can be prepared into test paper, developing powder and other test carriers for portable application, has the advantages of simplicity in operation, low cost, real-time detection and the like, and has the potential of large-scale popularization and application.

The invention provides a preparation method of trifluoromethanesulfonic acid ionic liquid. According to the preparation method, trifluoromethanesulfonic acid, pyrrole salt, pyridinium salt, pyrazine salt and the like are subjected to substitution reaction, static layering, organic phase water washing and organic phase drying to achieve the purpose of generating the trifluoromethanesulfonic acid ionic liquid. The prepared trifluoromethanesulfonic acid ionic liquid is high in purity, good in yield and suitable for large-scale industrial application. The method provided by the invention is green and environment-friendly, and does not use harsh reaction conditions and organic solutions; meanwhile, the cost is low, the yield is high, and the purity of a crude product can reach 99.95% or above after the crude product is purified; and the method has the advantages of less required equipment, small occupied area and low investment, and can realize industrial production.

The invention belongs to the technical field of organic synthetic chemistry, and discloses green and mild trifluoromethylated pyridino [1, 2-a] indole, a synthetic method and application, the method comprises the following steps: taking trifluoromethylsulfonyl pyridinium salt as a fluoroalkylation reagent under photocatalysis, and reacting the reagent with N-substituted indole to obtain the trifluoromethylated pyridino [1, 2-a] indole. According to the method, high-temperature reaction is not needed, the condition is mild, and the tolerance to a reaction substrate is good. According to the method disclosed by the invention, a photosensitizer and a metal catalyst are not needed in the reaction process, the synthetic route is green and environment-friendly, and the trifluoromethylated pyrido [1, 2-a] indole derivative can be rapidly and efficiently synthesized.

Compounds for inhibiting corrosion are provided that include a pyridinium substituent and a hydroxy substituent. Also provided are methods of making the compounds. Also provided are corrosion inhibitor formulations including the compounds. Also provided are processes for inhibiting corrosion of a metallic surface using the corrosion inhibitor formulations.

The present disclosure relates to a composition comprising: (a) a cationic polymerization initiator; and (b) an indene based or cyclopentadiene based resin; wherein the cationic polymerization initiator is selected from the group consisting of (i) an aromatic sulfonium salt-based cationic polymerization initiator; (ii) a phosphonium salt-based cationic polymerization initiator; (iii) a quaternary ammonium salt-based cationic polymerization initiator; (iv) an aluminum complex-based cationic polymerization initiator; (v) an aromatic iodonium salt-based cationic polymerization initiator; (vi) an aromatic diazonium salt-based cationic polymerization initiator; (vii) a pyridinium-based cationic polymerization initiator and (viii) a mixture thereof. Also described are varnishes and coatings formed from said composition.

The utility model relates to the technical field of chemical production, in particular to a pyridinium hydroxy propyl sulfobetaine production device which is characterized in that mounting rods are fixedly connected to the periphery of the top of a first supporting frame respectively, a stirring assembly is mounted among the mounting rods, a screening assembly is mounted at the bottom of the first supporting frame, and a drying assembly is mounted on the side face of the screening assembly; the screening assembly is matched with the reciprocating assembly to drive a screen to reciprocate, so that in the production process of pyridinium hydroxy propyl sulfobetaine, continuous screening operation of reactants can be achieved, it is not needed to carry out step by step and switch different steps depending on workers any more, the continuity and smoothness of production are greatly improved, and the production efficiency is improved. According to the automatic screening device, the production efficiency is effectively improved, automatic reciprocating motion of the screen is achieved through the arrangement of the reciprocating assembly, manual intervention is reduced, the labor cost is reduced, meanwhile, the automatic screening process is more stable and reliable, the consistency of the screening effect can be ensured, and the production efficiency and the product quality are further improved.

The application discloses a pyridine cation mitochondrial fluorescent probe, the chemical name of the probe is 4-(8-dimethylamino-5-benzocoumarin)-methylpyridine iodine salt, and the chemical structural formula is shown as formula (I). The application further discloses application of the fluorescent probe in labeling or imaging display of mitochondrial distribution or morphology in living cells and in long-range tracking display of mitochondria in living cells and imaging display of nucleoli in cells. Experiments prove that the labeled mitochondrial fluorescent probe has high light bleaching resistance and a high fluorescence quantum yield, can realize long-range tracking of mitochondria in living cells, and can label fixed nucleoli in cells. It is indicated that the fluorescent probe has potential application and development value in the fields of fluorescent probes and tissue imaging, and has a wide application prospect.

The present invention relates to a copper electroplating solution, a copper electroplating solution additive, and a preparation method thereof. The solution comprises an accelerator, an inhibitor, and a leveler. The accelerator is sodium polydipropylene glycol sulfonate, the inhibitor is polyethylene glycol-6000, and the leveler is an azoaromatic benzyl quaternary ammonium salt compound. The additive is used as a leveler in the copper electroplating solution. The leveler is pyridinium benzyl ammonium chloride, having the structural formula: #imgabs0#. The additive is synthesized from pyridine and benzyl chloride. Compared with the prior art, the present invention can effectively shorten the electroplating time and achieve super filling without voids or gaps even in blind vias with higher aspect ratios.

This invention discloses a double-sided chain extender, its preparation method, and its application in the synthesis of ion-conducting polyurethane. The structure of the double-sided chain extender is shown in Formula I. The double-sided chain extender is prepared by a Michael addition reaction of an acceptor compound and 3-amino-1,2-propanediol. The acceptor compound is selected from one of the following: acrylic acid, 2-acryloylamino-2-methyl-1-propanesulfonic acid, acryloyloxyethyltrimethylammonium chloride, 1-vinyl-3-butylimidazolium chloride, 3-((2-(acryloyloxy)ethyl)dimethylammonium)propane-1-sulfonate, 2-(1-(6-(((2-(acryloyloxy)ethyl)carbamoyl)oxo)hexyl)pyridin-1-onthium-4-yl)ethane-1-sulfonate. This invention provides the application of the double-sided chain extender in the synthesis of ion-conducting polyurethane with excellent mechanical properties and ion transport capabilities. I.

The application provides a static spinning solution containing pyridinium propane sulfonate, a preparation method thereof and a static spinning method thereof. The static spinning solution comprises an additive pyridinium propane sulfonate, PAN polyacrylonitrile and DMF. Experiments prove that the static spinning solution has low cost, can improve the entanglement degree between molecular chains, inhibits the breakage of a solution jet in a static spinning process, and the micro-morphology is improved.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

The invention provides an aqueous organic flow battery using a polysubstituted pyridinium salt derivative as a negative electrode electrolyte, and belongs to the technical field of redox flow batteries. Comprising a negative electrode electrolyte, a diaphragm and a positive electrode electrolyte, and an electrolyte of the negative electrode electrolyte is a polysubstituted pyridinium salt derivative. The polysubstituted pyridinium salt derivative disclosed by the invention has excellent redox reversibility and electrochemical stability, a corresponding aqueous organic flow battery can be endowed with long cycle life and low energy attenuation, stable electrochemical performance is still kept after 3000 cycles, and the average capacity attenuation speed is 0.00013% / cycle (0.0025% / d).

The invention relates to the technical field of fluorescent probes, in particular to a cell membrane targeted near-infrared AIE fluorescent probe as well as a preparation method and application of the cell membrane targeted near-infrared AIE fluorescent probe. Dithieno [2, 3-b: 2 ', 3'-d] thiophene is adopted as a bridging structure, a triphenylamine unit is connected with a pyridinium salt unit, and the compound is specially used for targeted cell membrane localization and photodynamic tumor treatment. The near-infrared AIE fluorescent probe disclosed by the invention can be combined with a cell membrane to realize an effect of accurately and rapidly positioning cells; and under light stimulation, I-type / II-type ROS can be generated, the cell membrane structure can be destroyed, the cell membrane vacuolation can be realized, the effective killing of in-vivo and in-vitro tumor cells can be realized, and the method has important significance on tumor treatment.

The present invention discloses a preparation method and application of an oxime ester photoinitiator having a donor-acceptor structure. The preparation method constructs a large conjugated donor-acceptor structure oxime ester photoinitiator with triphenylamine as a donor, pyridinium salt as an acceptor, and oxime ester as a photoinitiator group through reactions such as Suzuki coupling, hydroxylation, oxime esterification, and salt formation. The photoinitiator can be used in photocuring systems such as coatings, inks, and 3D printing. It has high photoinitiation efficiency under both visible light and sunlight, and can meet the requirements of deep curing in different complex environments. The photoinitiator has the advantages of high initiation efficiency, ultra-low addition amount, and deep curing depth. The preparation process is simple, the raw materials are easily available, and large-scale industrial production can be achieved.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

The invention discloses a steel pipe cleaning mixed solution, a preparation method thereof and a method for cleaning pollutants on the surface of a steel pipe, and belongs to the field of metal surface treatment. The invention aims to solve the problems of low cleaning efficiency, non-uniform surface treatment effect, poor system stability and the like due to the adoption of a single acidic medium or a simple compound system in the traditional steel pipe cleaning method. According to the method, a mixed solution composed of nitric acid, ammonium bifluoride, sodium sulfate, 1-hydroxyethylidene-1, 1-diphosphonic acid, pyridinium propane sulfonate, a brightener, an emulsifier and water is adopted as a steel pipe cleaning medium. The steel pipe cleaning agent is scientific in formula component matching, high in cleaning efficiency, capable of effectively improving the surface state of a steel pipe, simple, convenient and feasible in operation process, environmentally friendly, suitable for batch cleaning treatment of related steel pipes and good in practicability and economical efficiency.

This invention relates to a chiral preparation method for florfenicol. Specifically, the method uses p-methylsulfonylbenzaldehyde and glycine ester as starting materials, and synthesizes the key chiral intermediate I through an asymmetric aldol reaction process under the action of a pyridinium salt carbonyl catalyst. Subsequently, through reduction, cyclization, fluorination, and hydrolysis ring-opening reactions, the chiral product florfenicol is obtained. Compared with existing technologies, this invention utilizes the strong catalytic ability of small-molecule pyridinium salt carbonyl catalysts, starting from inexpensive and readily available raw materials, to efficiently control the stereoselectivity of the aldol reaction process, highly selectively constructing the two chiral centers on the florfenicol structure, obtaining the desired chiral configuration, and finally synthesizing florfenicol. The preparation method of this invention is simple, rapid, and efficient.

The present invention relates to a chiral pyridinium salt carbonyl catalyst, a preparation method therefor and applications thereof. The catalyst has a general structural formula of: wherein R1 has a structural formula of: X1-6 are each independently N or C-R6-11; R2, R4, and R6-11 each comprise hydrogen, C1-24 alkyl, alkyloxy, (CH2)m, CO2Rd, halogen, nitro, cyano or trifluoromethyl; R3 comprises substituted or unsubstituted C1-24 alkyl, the substituent comprises halogen, C1-10 alkyl, C3-10 cycloalkyl or aryl, C1-8 carbonyl, C1-8 sulfonyl or phosphoryl, or C1-10 alkoxy or amino, and the carbonyl comprises aldehyde group, ketone carbonyl, ester carbonyl, carboxyl or amido; R5 has a structural formula of: X- is an anion. Compared with the prior art, the catalyst of the present invention is applied to the biomimetic aldol reaction of amino acid derivatives to synthesize a series of β-hydroxy-α-amino acid compounds having extremely high enantioselectivity.

A fluorescent probe for detecting cytochrome oxidase CYP2D6 and its application, which belong to the field of biomedicine technology. The specific probe substrate can be used to determine the enzyme activity of CYP2D6 in biological systems. The process of CYP2D6 enzyme activity determination is as follows: the benzylmethoxy demethylation reaction in the meso-position pyridinium quaternary ammonium salt of Bodipy compounds is selected as the probe reaction, and the activity of CYP2D6 enzyme in various biological samples is determined by quantitatively detecting the amount of its metabolite generated per unit time. The probe is a selective probe for detecting CYP2D6 activity, which can achieve efficient discovery of CYP2D6 inhibitors (including mechanism-type inhibitors) and in-depth research on CYP2D6-related diseases. The probe can also be used for rapid in vitro screening of reversible and irreversible inhibitors, activators and inducers of CYP2D6, and for detecting drug-drug interactions of CYP2D6 at the in vivo level.

This invention relates to a chiral preparation method for irushlstat. Specifically, the method uses 2,3-dihydro-1,4-benzodioxyl-6-aldehyde and 2-amino-1-(pyrrolidine-1-yl)ethyl ketone as starting materials, and carries out an asymmetric aldol reaction in the presence of a pyridinium salt carbonyl catalyst. Following reduction and amidation reactions, chiral irushlstat is obtained. Compared with existing technologies, this invention utilizes the strong catalytic ability of small-molecule pyridinium salt carbonyl catalysts, starting from inexpensive and readily available raw materials, to rapidly construct the two key chiral centers of the irushlstat structure with high diastereoselectivity and high enantioselectivity, shortening the synthetic steps of irushlstat. Furthermore, the reaction conditions of this invention are mild and the operation is simple.

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.

To improve electrochromic materials so that they can be used as a transparent medium for forming high-quality articles, especially high-quality eyeglass lenses, while maintaining electrochromic properties and having a wide range of colors. [Solution] The present invention relates to a novel group of electrochromic compounds. More specifically, the present invention relates to benzazole and condensed azole compounds substituted with one or more pyridinium rings, and the use of these compounds as variable transmittance media for the manufacture of optical articles such as spectacle lenses.