39 results about "Squaric acid" patented technology

The invention relates to the technical field of adsorbents, and discloses a moisture-resistant carbon dioxide trapping adsorbent, and a preparation method thereof comprises the following steps: S1, blending oxalic acid or oxalate or squaric acid and a zinc source in a reaction system to obtain a mixture I; s2, dissolving an organic ligand in a solvent to obtain a mixture II; s3, the mixture I and the mixture II are subjected to a reaction and post-treatment, and the adsorbent is obtained. According to the prepared adsorbent, a pore structure is formed in situ in the preparation process, the specific surface area is large, the porosity is large, the structure can be kept stable in the presence of water and steam, and the adsorbent is stable to wet acid gas.

The invention provides a method for preparing squaric acid and a method for preparing a lithium supplement agent of lithium squarate. The method for preparing squaric acid comprises the steps of preparing an intermediate I, preparing an intermediate II and preparing squaric acid. The method for preparing the squaric acid is a novel squaric acid synthesis route, and the squaric acid is obtained through cycloaddition / substitution reaction of perchloroprene serving as an initial raw material and morpholine, hydrolysis / rearrangement reaction in a buffer system and acid hydrolysis reaction in sequence. The method for preparing squaric acid has the advantages of simple reaction steps, mild reaction conditions, high yield, low cost and the like. The invention also provides a method for preparing the lithium squarate lithium supplement agent, and the prepared squaric acid and lithium-containing alkali are blended in a solvent for reaction to generate the lithium squarate. The method for preparing the lithium squarate lithium supplement has the advantages of simple reaction steps, mild reaction conditions, high yield, low cost and the like.

The invention discloses an IEF-11 / WO3-xS type heterojunction material with full spectrum response as well as a preparation method and application of the IEF-11 / WO3-xS type heterojunction material. The heterojunction is prepared by taking squaric acid, tetrabutyl titanate and WO3-x particles as raw materials, wherein the value range of x in WO3-x is 0 < = xlt; 1. The heterojunction material creatively realizes full-spectrum response from ultraviolet to near infrared through S-type energy band structural design, the separation efficiency of photo-induced electron-hole pairs reaches 2.47 times (compared with WO3-x) and 1.57 times (compared with IEF-11) due to a unique carrier transport mechanism, and strong redox sites are synchronously reserved, so that the material can be applied to the field of photoelectron-hole separation. And compared with a single-component material, the photocatalytic performance is improved by 3.74 times (compared with WO3-x) and 1.41 times (compared with IEF-11). Experiments show that under full-spectrum irradiation, the inactivation rate of the material to escherichia coli can reach 99%, the 120-minute degradation rate of the material to tetracycline (TC) reaches 86%, the material shows broad-spectrum degradation capacity to typical organic pollutants such as chlortetracycline (CTC), rhodamine B (RhB) and methylene blue (MB) in a visible region, and the 120-minute degradation efficiency reaches 77%, 53% and 95% respectively. The heterojunction material is prepared through a simple hydrothermal method, and has important application value in the fields of environmental governance, photocatalytic disinfection and the like.

The invention provides a vanadium-based metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of metal organic framework materials. The vanadium-based metal organic framework material is of a three-dimensional framework structure formed by connecting a one-dimensional vanadium oxygen chain and a squaric acid ligand through coordinate bonds. The preparation method of the vanadium-based metal organic framework material comprises the following steps: adding a vanadium source and an organic ligand into an acidic aqueous solution for solvothermal reaction to obtain the vanadium-based metal organic framework material, and the organic ligand is squaric acid. The vanadium-based metal organic framework material provided by the invention can be used for separating straight-chain alkane and isomers thereof.

The application provides a squaric acid derivative compound and a preparation method and application in a battery. The structural formula of the squaric acid derivative compound is shown in formula I, formula II, formula III or formula IV, X is selected from SO2, SO, CO, B-R, P-R, PO-R or Si-R2, Y is selected from B-R2, P-R2, PO-R2 or P-R4, Z is selected from SO, C or P-R, W is selected from B, P or P-R2, and R is hydrogen, halogen or C1-C3 alkyl. The squaric acid derivative compound can be directly used in an electrolyte as a functional additive, can inhibit the oxidation decomposition of the electrolyte caused by the dissolution of metal ions in the positive electrode material, and can improve the high-temperature storage and high-temperature cycle performance of the battery. Moreover, the lithium salt of the novel squaric acid derivative compound can also be used as an electrolyte salt, thereby playing a lithium supplementing role.

The invention belongs to the field of recycling of waste ardealite and green low-cost synthesis of metal-organic framework (MOF) materials, and discloses a method for preparing a UTSA-280 material from ardealite, which comprises the following steps: (1) carrying out dry reaction on squaric acid and a solid strong alkali compound under the mechanochemical action to obtain squarate; and (2) carrying out dry reaction on ardealite and the squarate obtained in the step (1) under the mechanochemical action again, and centrifuging, washing and drying the product after the reaction to obtain the UTSA-280 material. According to the invention, phosphogypsum is used as a raw material, and the classical important MOF material with high added value, namely UTSA-280, can be prepared through simple and convenient process treatment, such as a two-step mechanochemical reaction (such as a two-step ball milling method), and particularly, the MOF material can be prepared in a green and low-cost manner under the conditions of normal temperature and normal pressure. The invention provides a new way for upgraded chemical recycling of phosphogypsum.

Provided are: a squaric acid dye having excellent heat resistance; and a method for purifying the squaric acid dye. Provided are: a squaric acid dye containing at least one of a compound represented by formula (1) and an isomer thereof, the purity of the squaric acid dye measured at a detection wavelength of 254 nm using high-speed liquid chromatography being higher than that of the compound represented by formula (1) and the isomer thereof, a method for purifying the squaric acid dye, a dispersion containing the squaric acid dye, and a near-infrared absorbing composition containing the squaric acid dye; the ratio of the peak area derived from the compound represented by formula (1) and the isomer thereof is 90% or more with respect to all the peak areas excluding the peaks derived from the measurement solvent. # imgabs0 #

The invention discloses a squaric acid skeleton covalent organic framework supported palladium catalyst as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalyst preparation. The preparation method of the squaric acid skeleton covalent organic framework supported palladium catalyst comprises the following steps: putting melem and squaric acid into a pressure-resistant pipe, adding a mixed solvent of water and methanol, reacting, cooling to room temperature, carrying out suction filtration, collecting a solid, and drying to obtain COF-SME; mixing a palladium acetate solution with COF-SME, reacting at room temperature, performing suction filtration after the reaction, and washing and drying a filter cake to obtain the catalyst Pd-coated COF-SME. When the catalyst Pd-coated COF-SME is used for catalyzing a Suzuki-Miyaura coupling reaction, nitrogen protection is not needed, the catalytic efficiency is high, the temperature is low, the dosage is low, the yield of a target product is high, and the catalyst Pd-coated COF-SME is convenient to recycle.

The invention relates to the technical field of photocatalysis, in particular to a Yb < 3 + > / Er < 3 + > co-doped full-spectrum response Ti-MOF / BiOBr S type heterojunction as well as a preparation method and application thereof. The invention provides an S-type heterojunction composite catalyst, which is mainly prepared from squaric acid, a titanium source, Yb < 3 + > and Er < 3 + > doped BiOBr nanosheets, and the mass ratio of the BiOBr nanosheets in the catalyst is 60%-95%. The high specific surface area of the IEF-11 is beneficial to pollutant enrichment, and the addition of the nanosheet can expand the photoresponse range and can be used as an electron trapping agent, so that the sunlight utilization rate and the photocatalytic performance are improved; the constructed S-type heterojunction can promote separation of photon-generated carriers, and meanwhile, the strong oxidation-reduction capacity of a composite system is reserved. The catalyst has the capabilities of full-spectrum response, efficient degradation of organic pollutants and inactivation of microorganisms, and has a wide application prospect.

The invention discloses a preparation method of squaric acid capable of recovering a catalyst, which comprises the following steps: mixing perchloro-1, 3-butadiene, morpholine and an alkaline substance, heating to 85-120 DEG C, reacting for 5-60 hours, filtering after the reaction is finished, and taking filtrate to obtain a first intermediate product; mixing the first intermediate product with a first solid acid catalyst in an organic solvent, stirring and reacting at 25-100 DEG C for 4-24 hours, filtering and recovering the first solid acid catalyst, and carrying out reduced pressure distillation on filtrate to remove the organic solvent, so as to obtain a second intermediate product; mixing the second intermediate product with a second solid acid catalyst and water, reacting at 110 DEG C for 10-24 hours, cooling, filtering and taking filter residues to obtain a squaric acid crude product and second solid acid catalyst mixture; and re-dissolving the squaric acid crude product and the second solid acid catalyst mixture in water, filtering and recovering the solid acid, decolorizing the filtrate with activated carbon, filtering, and recrystallizing to obtain squaric acid. According to the method, the squaric acid yield is increased, and the production management cost is reduced.

Squaric acid-based polymers and their use in electrode materials and / or electrolyte compositions, as well as their production processes are described herein. Also described are electrode materials, electrodes, electrolyte compositions, electrochemical cells, electrochemical accumulators, and optoelectronic devices comprising the polymers and their uses.

The invention belongs to the technical field of enzyme composite materials and biological catalysis, and particularly relates to an immobilized enzyme catalyst based on a copper-based metal organic framework as well as a preparation method and application of the immobilized enzyme catalyst. Cytochrome c (Cyt c), squaric acid and copper ions are uniformly mixed through an in-situ co-precipitation method, in-situ embedding of Cyt c is achieved through hydrogen bonds and coordinate bonds generated in the Cu-MOF forming process, the Cyt c-coated Cu-MOF compound enzyme catalyst is prepared, a constructed Cu-MOF carrier is of a mesoporous structure, a stable protective microenvironment can be provided for Cyt c, enzyme leaching is effectively inhibited, and the catalyst has the advantages of being capable of being used for preparing the complex enzyme catalyst. The operation stability and the environmental tolerance are remarkably improved, and the catalyst shows efficient catalytic degradability in organic pollutants including phenolic compounds and dyes, and has wide application prospects in the fields of biological catalysis and the like. Moreover, the method is mild in condition, simple and convenient to operate, low in cost and easy for large-scale production.

The invention provides a squaric acid compound or a salt thereof, a solar cell, a power generation device, and a power utilization device. The compounds are represented by the following general formula (I); wherein Z is: # imgabs0 # or a substituted or unsubstituted five or six membered heteroaryl group containing at least one heteroatom, where the heteroatoms comprise O, S and N; substituent groups of the heteroaryl group comprise-OH, carboxyl,-CONR2,-CHO, halogen,-NH2 and-CN; r'each independently includes-NH2,-NHR,-NHC (0) R,-OH,-SH, and C1-C4 alkyl, R ''each independently includes a phosphate group, a sulfonic acid group, a boronic acid group,-Si (OR) 3,-NR2,-NR3 +,-CONR2,-COOR, and halogen, where R'each independently includes H and C1-C4 alkyl, and when R' 'includes a plurality of Rs, the plurality of Rs are the same or different.

The purpose of the present invention is to provide a resin composition that is a molten mixture containing a resin and a near infrared-absorbing colorant, and from which it is possible to produce a molded body having good optical characteristics even when used in melt forming. The present invention is a resin composition characterized by being a molten mixture containing a resin and a cyanine colorant and / or a squarylium colorant. The resin composition is also characterized in that the cyanine colorant is a compound that includes a cation constituted from a cyanine structure and an anion comprising tetrakis(pentafluorophenyl)borate, in that the cation constituted from a cyanine structure has a specific structure or has a specific structure at at least one terminal of a polymethine skeleton, and in that the squarylium colorant has a structure that includes a nitrogen-containing conjugated system in which at least one structure added to a squaric acid moiety is constituted from a 5-membered ring or a 6-membered ring or has a structure that includes a nitrogen-containing conjugated system in which at least one structure added to a squaric acid moiety is constituted from a 5-membered ring or a 6-membered ring via one conjugated carbon.

The invention relates to an aromatic polymer material, a preparation method thereof and application of the aromatic polymer material as a fluorescence sensor in active carbonyl compound detection, and belongs to the field of fluorescence sensing. The preparation method comprises the following steps: by taking squaric acid (SA) and 1, 3, 5-tri (4-aminophenyl) benzene (TAPB) as monomers, carrying out solvothermal condensation reaction in a water-phase solvent to prepare the aromatic polymer material SA-TAPB. The polymer material presents a regular microsphere morphology and has good fluorescence performance, the invention also discloses application of the material in the field of fluorescence sensing, especially detection of active carbonyl compounds, and the material has high specific recognition capability on active carbonyl compounds such as formaldehyde (FA), glyoxal (Gly), acrolein (MGO) and the like in various analytes, and has good application prospects. High-selectivity and high-sensitivity fluorescent sensing of the compounds can be realized, and the preparation method is simple, convenient and efficient and has extremely high practicability.

This invention discloses a RhMOF catalyst for the catalytic decomposition of N2O and its preparation method, relating to the field of novel catalyst synthesis for nitrous oxide treatment. The preparation method of this invention includes the following steps: (1) mixing Nb2O5, HF solution, and deionized water; (2) adding squaric acid and RhCl3 to the solution obtained in step (1) at room temperature with stirring; (3) heating the reaction system obtained in step (2) at 120–140°C for 24–48 h, filtering the resulting solid, rinsing it with water and acetone at room temperature, and drying it to obtain the RhMOF catalyst. The RhMOF catalyst prepared by this invention can reduce the 100% decomposition temperature of N2O by about 250°C, greatly reducing the catalytic reaction temperature of Rh-based catalysts, and the preparation method is simple and easy to promote.

The present invention provides a synthesis method, a forming method and an application of a metal-organic framework material. The synthesis method of the present invention includes: reacting a calcium salt with squaric acid to obtain calcium squarate, wherein the calcium salt is a weak acid salt of calcium ions. The synthesis method of the present invention does not require the additional use of an alkaline additive to promote the dissolution of squaric acid, and can achieve the large-scale synthesis of the metal-organic framework material at room temperature. The reaction conditions are mild, the process is simple and easy to operate, the reaction yield is high, and the product purity is high. The present invention also avoids pore blockage by adding a suitable binder during the forming process of the metal-organic framework, and the formed material has excellent adsorption and separation effects on propyne and propylene gases.

This invention relates to a method for synthesizing squaric acid, the method comprising the following steps: (1) reacting alkyl vinyl ether, trichloroacetyl chloride, and zinc to obtain 2,2-dichloro-3-alkoxycyclobutanone; (2) subjecting 2,2-dichloro-3-alkoxycyclobutanone to chlorination with chlorine to obtain 2,2,4,4-tetrachloro-3-alkoxycyclobutanone; (3) subjecting 2,2,4,4-tetrachloro-3-alkoxycyclobutanone to elimination reaction with a base to obtain 2,4,4-trichloro-3-alkoxycyclobuten-1-one; and (4) subjecting 2,4,4-trichloro-3-alkoxycyclobuten-1-one to hydrolysis to obtain the squaric acid. The synthesis method provided by this invention avoids the use of the prohibited raw material perchloro-1,3-butadiene and has lower energy consumption, meeting the needs of green and clean production.

The invention relates to a squaric acid compound or a pharmaceutically acceptable salt thereof, or a deuterated compound, and a preparation method and application thereof. The structural general formula of the squaric acid compound is shown as formula I, II, III, IV, V or VI: # imgabs0 # imgabs1 #. The compound emits near-infrared light, is stable to light, small in molecular weight, large in Stokes shift and large in molar absorption coefficient, and can be used for fluorescent probes and preparation of contrast agents.

The invention belongs to the technical field of photocatalysis, and particularly relates to a porous squaric acid-phenylenediamine polymer and a preparation method and application thereof.The preparation method comprises the steps that squaric acid and phenylenediamine are subjected to a solvothermal reaction to form a Schiff base polymer, and the porous squaric acid-phenylenediamine polymer is obtained; the phenylenediamine is o-phenylenediamine or m-phenylenediamine. The prepared porous squaric acid-phenylenediamine polymer serves as a catalyst, the light absorption range of the porous squaric acid-phenylenediamine polymer is widened to the infrared range, and due to effective electron and hole regulation and control, H2O2 can be efficiently produced in a visible light source and pure water without the existence of a sacrificial agent. And the produced H2O2 is further disinfected and sterilized, and pollutants are removed through an in-situ Fenton reaction, so that relatively good application potential is shown.

The invention relates to a preparation method of a nanowire structured squaric acid tellurium zinc ion battery positive electrode material. The preparation method comprises the following steps: ultrasonically mixing tellurium dioxide and squaric acid to form white mixed dispersion liquid, and heating for pre-reaction; performing hydrothermal reaction on the mixed dispersion liquid to obtain a crude product; centrifuging, washing and drying the crude product to obtain a primary product; soaking the primary product into a zinc salt solution, stirring for reaction, and performing suction filtration and drying to obtain a final product. The invention also relates to a nanowire structured squaric acid tellurium zinc ion battery positive electrode material and application thereof in a zinc ion battery positive electrode. The nanowire structured squaric acid tellurium positive electrode material disclosed by the invention is beneficial to increasing the contact area between the tellurium positive electrode material and electrolyte, promoting electrochemical reaction kinetics, enabling the reaction of the electrode material to be more complete, improving the energy density, and avoiding the problem of cycle performance reduction caused by the change of the volume of the electrode material in the electrochemical reaction process; the prepared material has a wide application prospect in the positive electrode of the zinc ion battery, and the energy density and the cycling stability of the battery are improved.

The application provides a preparation method of a sodium iron phosphate pyrophosphate positive electrode material, a positive electrode material and an electrochemical device. The preparation method comprises the following steps: mixing a sodium source, an iron source, a phosphorus source and a first carbon source, performing one-time grinding and drying, and then performing one-time sintering to obtain a sodium iron phosphate pyrophosphate precursor; dispersing the sodium iron phosphate pyrophosphate precursor, the first carbon source and an organic acid in a solvent, performing two-time grinding, and then drying to obtain a powder, wherein the organic acid comprises at least one of glyoxylic acid, phthalic acid, maleic acid, malic acid, oxalic acid, citric acid, acetic acid, squaric acid and tartaric acid; and performing two-time sintering on the powder to obtain the sodium iron phosphate pyrophosphate positive electrode material. The sodium iron phosphate pyrophosphate positive electrode material prepared by the preparation method has the advantages of low surface residual alkali content, good air stability and excellent electrochemical performance.

The invention relates to the technical field of preparation of D-psicose, and discloses a method for generating D-psicose through fructose isomerization. The method comprises the following steps: in the presence of a solvent I, carrying out a contact reaction I on fructose and a catalytic material; the catalytic material is a D-psicose-3 epimerase mutant or a D-psicose-3 epimerase composite material, and the D-psicose-3 epimerase composite material is prepared from a metal-organic framework material and an enzyme loaded on the metal-organic framework material, the enzyme is D-psicose-3 epimerase and / or a D-psicose-3 epimerase mutant, and an organic ligand of the metal-organic framework material is squaric acid. The method can effectively improve the catalytic efficiency of isomerizing fructose to generate D-psicose.

The invention relates to a method for synthesizing squaric acid, which comprises the following steps of: (1) reacting alkyl vinyl ether, trichloroacetyl chloride and zinc to obtain 2, 2-dichloro-3-alkoxy cyclobutanone; (2) carrying out a chlorination reaction on the 2, 2-dichloro-3-alkoxy cyclobutanone and chlorine gas to obtain 2, 2, 4, 4-tetrachloro-3-alkoxy cyclobutanone, and carrying out a chlorination reaction on the 2, 2-dichloro-3-alkoxy cyclobutanone and chlorine gas to obtain 2, 2, 4, 4-tetrachloro-3-alkoxy cyclobutanone; (3) the 2, 2, 4, 4-tetrachloro-3-alkoxy cyclobutanone and alkali are subjected to an elimination reaction, and 2, 4, 4-trichloro-3-alkoxy cyclobutene-1-one is obtained; and (4) carrying out a hydrolysis reaction on the 2, 4, 4-trichloro-3-alkoxy cyclobutene-1-ketone, so as to obtain the squaric acid. The synthesis method provided by the invention can avoid the use of a forbidden raw material perchloro-1, 3 butadiene, also has lower energy consumption, and can meet the requirements of green and clean production.

The invention relates to a marking precursor comprising a chelator or fluorination group for radiolabelling with 44SC, 47SC, 55Co, 62Cu, 64Cu, 67Cu, 66Ga, 67Ga, 68Ga, 89Zr, 86Y, 90Y, 90Nb, 99mTc, 111In, 135Sm, 140Pr, 159Gd, 149Tb, 160Tb, 161Tb, 165Er, 166Dy, 166Ho, 175Yb, 177Lu, 186Re, 188Re, 213Bi and 225Ac or with 18F, 131I or 211At, and one or two biological targeting vectors which are coupled to the chelator or fluorinating group via one or more squaric acid groups.

The invention discloses a catalyst loaded with squaric acid dye as well as a preparation method and application of the catalyst. The catalyst loaded with the squaric acid dye can efficiently utilize visible light energy of a full spectrum band, and can photocatalytically oxidize thioether to synthesize sulfoxide compounds with high chemical selectivity. The catalyst provided by the invention is easy to separate from a reaction mixture, can be repeatedly used, and keeps very high catalytic activity.

This invention belongs to the fields of functional fluorescent dyes and biomedical technology, specifically relating to a near-infrared squaric acid cyanine dye with ultra-high fluorescence brightness, its preparation method, and its application. A water-soluble charged 1,8-naphthoylimide derivative is obtained through an imino substitution reaction of 1,8-naphthoylimide, which is then coupled with squaric acid to obtain a near-infrared squaric acid cyanine dye with ultra-high fluorescence brightness. The obtained near-infrared squaric acid cyanine dye is then reacted with mPEG. 2k Nanoparticles were obtained by co-assembling DSPE ammonium salt. Compared to the dye in aqueous solution, the dye in the co-assembled nanoparticles exhibited a 58-fold increase in fluorescence intensity, which is attributed to the charge and squaric acid parent compound in the molecular structure, as well as mPEG. 2k The electrostatic interaction of DSPE ammonium salt is related to the reduction of molecular vibrations, which gives the resulting nano-formulations high fluorescence quantum yield, fluorescence brightness, absorption coefficient, and good fluorescence and photothermal properties, making them of great application potential in chemical and biological sensing, biomedical imaging, and optical diagnosis and treatment.

The invention discloses a fluorine-containing squarylium cyanine near-infrared absorption dye and a preparation method thereof. The chemical structural formula of the fluorine-containing squarylium cyanine near-infrared absorption dye is shown in the specification. The dye is of a D-A-D type molecular structure, has enough low absorbance in a visible wavelength region of 400-750 nm, and has enough high absorbance in a near-infrared wavelength region of 750-1000 nm, so that the dye can be used for zinc ion colorimetric response and qualitative and quantitative detection based on near-infrared light absorption.

The invention discloses an application of squaric acid compounds in preparation of drugs for resisting toxoplasmosis. According to the novel application of the squaric acid compounds in resisting toxoplasma gondii infection provided by the invention, two preferable squaric acid compounds, namely F-squaric acid and 3-F-squaric acid, with good insect inhibition effects are explored through synthesis and insect inhibition experiments of the squaric acid compounds, the in-vitro insect inhibition rate of the squaric acid compounds on toxoplasma gondii is high, in-vitro replication of the toxoplasma gondii can be well inhibited, and the squaric acid compounds can be applied to prevention of toxoplasma gondii infection. The formation of polypide plaques is obviously inhibited, and the growth of toxoplasma gondii can be effectively inhibited; and the compound has good safety, does not have cytotoxicity, and belongs to a low-toxicity or non-toxic squaric acid compound. Meanwhile, the squaric acid compound provided by the invention also can inhibit the breeding of toxoplasma gondii in a mouse body and treat toxoplasmosis, has a remarkable treatment effect, does not influence the growth of the mouse, can resist toxoplasma gondii infection, can be used for preparing and developing more products for resisting toxoplasma gondii infection and medicines for treating toxoplasmosis, and has a wide application prospect. The method is of great significance to research and development of drugs for treating toxoplasmosis.

The application discloses a preparation method of a transition metal selenide catalyst based on a Co-based MOF of a square acid. The Co-based MOF of the square acid is a dice-shaped square Co nanocage, and the Co-based MOF of the square acid is stable in thermodynamic properties and chemical properties. Then, the transition metal selenide catalyst is prepared by using selenium (Se) powder as a Se source and through an anion exchange method. The prepared transition metal selenide (CoSe2) has a large interface contact area, which is beneficial to exposing more surface active sites and improving catalytic activity.