248 results about "Metal chelate" patented technology

The invention relates to the field of polypeptide compositions, in particular to a polypeptide metal chelate and application thereof in the field of cosmetics, and the polypeptide metal chelate is formed by chelating a polypeptide compound and a metal ion compound. The structure of the polypeptide compound is [gamma-Glu] n-AA, n is greater than or equal to 1, and AA is selected from glycine, alanine, valine, leucine, isoleucine, methionine (methionine), proline, tryptophan, serine, tyrosine, cysteine, phenylalanine, asparagine, glutamine, threonine, asparaginic acid, glutamic acid, lysine, arginine or histidine; the polypeptide chelated zinc prepared by the invention has remarkable oil control and anti-inflammatory effects, and can be compounded with other raw materials to form cosmetics with oil control and acne removal effects.

The present disclosure relates to pharmaceutical formulations of contrast agents used in magnetic resonance imaging (MRI) and methods of making and purifying the same. More specifically, disclosed are such pharmaceutical formulations of chelate complexes with lanthanide metal ions, such as gadolinium ions, as well as methods for obtaining and purifying the same. In particular, the pharmaceutical formulations are free or substantially free of water molecules coordinated with the lanthanide metal chelate complexes and provide pharmaceutical compositions that are more stable and release less lanthanide ion, specifically gadolinium ion, into the human body when injected as MRI contrast agents as compared to other typically used MRI contrast agents.

The invention discloses an insect-repelling environment-friendly sand-containing fog sealing layer and a preparation method thereof. The insect-repelling environment-friendly sand-containing fog sealing layer comprises the following components in parts by mass: 35-70 parts of asphalt; 30 to 70 parts of water; 2-8 parts of a composite emulsifier; 0.5 to 3 parts of a defoaming agent; 5 to 30 parts of acrylic ester; 0.1 to 1 part of a photoinitiator; 20 to 40 parts of a suspending agent; 20 to 45 parts of fine sand particles; 5 to 40 parts of insect-repelling environment-friendly microcapsules; a shell material of the insect-repelling environment-friendly microcapsule is a composite shell material containing silicon dioxide / nano tourmaline, and a core material of the insect-repelling environment-friendly microcapsule comprises one or more of a pyrethroid compound, a carboxylic ester compound, an amide compound and a plant extract; a metal chelate is loaded on the surface of the shell material. The insect-repelling environment-friendly sand-containing fog sealing layer has good pavement performance and insect-repelling performance, and can effectively inhibit the amount of pollutants generated when an asphalt pavement is exposed to high temperature and solarization.

The invention provides a binder for a catalytic cracking catalyst and a preparation method thereof, the binder comprises a sizing material, a curing agent and a modifier, and the curing agent is prepared from a gamma-alumina precursor, an acid and an alkyl ammonium salt through a hydrothermal reaction; the modifier is prepared by reaction of a polymeshed chelating ligand, a metal center ligand, ethanol and organic acid; the sizing material comprises a phosphorus-containing compound and an aluminum-containing compound. In the adhesive of the catalytic cracking catalyst provided by the invention, a metal center ligand composed of a multi-metal chelating ligand and a plurality of metals is introduced, under the promotion of organic acid and ethanol, a multi-metal chelate modifier can be prepared in situ in the process of preparing the adhesive, and compared with the direct use of a commercially available metal chelate, the preparation method has the advantages that the cost is low, and the efficiency is high. The in-situ prepared multi-metal chelate modifier has better water solubility, can promote the combination of the modifier and the phosphorus-aluminum sol, and has a better modification effect.

The invention relates to the field of chelating agent preparation, in particular to an efficient metal chelating agent and a preparation method and application thereof. The preparation method comprises the following preparation steps: (1) dissolving dibutanol amine in absolute ethyl alcohol, adding carbon disulfide, reacting for 5-8 hours at 0-5 DEG C in a nitrogen atmosphere, adjusting the pH to be neutral by using a sodium hydroxide aqueous solution, and performing rotary evaporation to obtain sodium bis (4-hydroxybutyl) dithiocarbamate; and (2) adding 4-[bis (beta-chloroethyl) amino] benzaldehyde, the bis (4-hydroxybutyl) sodium dithiocarbamate obtained in the step (1) and a catalyst into absolute ethyl alcohol, heating and refluxing, reducing pressure to remove absolute ethyl alcohol, adding the obtained solid into pure water, stirring, extracting, combining organic phases, drying moisture in the organic phases, concentrating, standing for 10-20 hours, and separating to obtain the metal chelating agent. The prepared metal chelating agent has good dispersity and solubility in various solvents, and a stable metal chelate is formed through coordination chelation of active functional groups and heavy metal ions.

The invention relates to the technical field of biological separation materials, and discloses an amine-functionalized magnetic nano composite material and application thereof in protein separation and purification. The material has a core-shell structure and comprises a magnetic ferroferric oxide nano core, an ordered mesoporous silicon dioxide intermediate layer and a covalent grafted polyethyleneimine functional layer. By controlling the matching relationship between the pore diameter of mesopores and the molecular size of the polymer and adopting a crosslinking strategy, the material has high magnetic responsiveness, rapid mass transfer performance and high-density surface amino groups. The material shows high adsorption capacity, rapid adsorption kinetics and good cycle stability in the protein separation process, and is suitable for enrichment purification and metal chelating affinity separation of protein in a biological sample. According to the invention, the technical problems of low protein adsorption capacity, slow dynamics and poor cycling stability caused by compact shell layer, non-uniform amino distribution and limited mass transfer of the existing amine functionalized magnetic material are solved.

The invention discloses a modified ruthenium-based acidic oxygen evolution catalyst as well as a preparation method and application thereof, and belongs to the technical field of nano materials and catalysis. The preparation method comprises the following steps: firstly, mixing a mixed solution of transition metal salt and soluble ruthenium salt with a complex ligand dispersion liquid, then evaporating and curing to obtain a metal chelate precursor, and finally performing pyrolysis oxidation to obtain the metal chelate. The transition metal salt comprises at least one of soluble Nb, Ti, Cr, Mn, Co, Cd, Sn and Sb metal salts. The preparation process is simple and easy to implement, the precursor salt is flexible to select, the synthesis method has high expansibility in preparation of the nano oxide, a preparation way is provided for application of the nano oxide in the fields of energy, environment, sensing and the like, and the prepared modified ruthenium-based acidic oxygen evolution catalyst is small and uniform in particle, clean in surface, free of ligands and suitable for industrial production. The catalyst shows high activity and high stability on oxygen evolution reaction, and a new choice is provided for a commercial anode catalyst for producing hydrogen by electrolyzing water.

The invention discloses a preparation method of ultra-clean high-purity methanol for semiconductor electronics, which comprises the following steps: (1) mixing industrial methanol with a metal chelate, stirring for 1 hour at 20-35 DEG C, and dehydrating for 1-1.5 hours by using a 4A molecular sieve; (2) enabling the dehydrated methanol solution to pass through an adsorption device filled with 200kg of metal boron adsorbent, and reacting for 2-2.5 hours at the temperature of 40-50 DEG C; (3) carrying out ion exchange to remove anions and cations; (4) carrying out double-tower rectification on the methanol solution treated in the step (3) through a pressurizing tower and an atmospheric tower in sequence; and (5) conveying the rectified methanol solution to a hundred-grade purification room by a pump, and carrying out precision filtration. The content of methanol is increased to 99.9% or above, the content of anions is reduced to 100 ppb or below, the content of cations is reduced to 0.1 ppb or below, the water content is reduced to 200 ppm or below, the content of particles larger than 0.2 micrometer is reduced to 200 / ml or below, and the overall index reaches the G4 standard.

The invention belongs to the technical field of wastewater treatment, and particularly discloses a treatment method for complex-component mine acid wastewater. The method comprises the following steps: introducing wastewater into a primary mixing reaction tank, and respectively adding an alkaline agent, powdered zeolite and a heavy metal capturing agent to adjust the pH value and remove organic nitrogen and NH3-N to form a heavy metal chelate precipitate; pressurizing effluent in the first-stage mixing reaction tank to a first-stage efficient cyclone water purifier, carrying out solid-liquid separation, and introducing the wastewater into an efficient denitrification filter to adsorb organic nitrogen; introducing the filtrate in the efficient denitrification filter into a secondary mixing reaction tank, and then respectively adding a heavy metal capturing agent, a defluorination agent and NaClO; pressurizing the wastewater in the second-stage mixing reaction tank to a second-stage efficient cyclone water purifier, then introducing the wastewater into an efficient manganese removal filter, then introducing filtrate into a clean water tank, and finally calculating the removal rate n of each pollutant. The method has the characteristics of high treatment efficiency, simplicity and convenience in operation, stability in operation and low cost.

The invention discloses an insect-repelling environment-friendly microcapsule, an insect-repelling environment-friendly asphalt additive and a preparation method of the insect-repelling environment-friendly microcapsule. A shell material of the insect-repelling environment-friendly microcapsule is a composite shell material containing silicon dioxide / nano tourmaline, and a core material of the insect-repelling environment-friendly microcapsule comprises one or more of a pyrethroid compound, a carboxylic ester compound, an amide compound and a plant extract; a metal chelate is loaded on the surface of the shell material. The insect-repelling environment-friendly microcapsule disclosed by the invention not only can efficiently and durably repel insects around a road, but also can effectively inhibit the amount of pollutants generated by the asphalt under the action of high temperature in the production, construction and pavement application processes, and provides a brand new idea for functional utilization of asphalt materials.

The utility model discloses a treatment system for amino acid metal chelate wastewater. The treatment system comprises an oxidation pond, a solid-liquid separation device, an acid-base adjusting pond, an anaerobic biological membrane pond, an MBBR biochemical pond and a sedimentation pond which are communicated in sequence. The wastewater treated by the treatment system disclosed by the utility model meets the index requirements of reuse or discharge, the treatment of the amino acid metal chelate wastewater is simply and economically realized, and compared with the existing evaporation concentration method, the treatment cost of specific wastewater is greatly reduced, the treatment flow is simplified, and the industrial practical value is very high.

The invention relates to high-flame-retardant polypropylene resin for a new energy automobile and a preparation method of the high-flame-retardant polypropylene resin, and belongs to the technical field of high polymer materials. The high-flame-retardant polypropylene resin is prepared from the following raw materials: polypropylene, maleic anhydride grafted polypropylene, POE grafted acrylic acid, LLDPE grafted maleic anhydride, Si-APP (at) BN, a bio-based phytic acid metal chelate, nano titanium carbide, a TPC polyester elastomer, nano cerium oxide and silicone powder. Si-APP (at) BN is an organic silicon modified ammonium polyphosphate (at) boron nitride core-shell structure material obtained by coating the surface of nano boron nitride with Al2O3, then polymerizing ammonium polyphosphate and grafting vinyl trimethoxy silane. The POE grafted acrylic acid, the LLDPE grafted maleic anhydride, the Si-APP coated BN, the bio-based phytic acid metal chelate, the TPC polyester elastomer and other components have a synergistic effect, a heat conduction-flame retardant network is constructed, and the bottleneck of the prior art is broken through through molecular structure design and process innovation.

The preparation method of the ganoderma lucidum protein peptide microelement chelate comprises the following steps: carrying out enzymolysis on ganoderma lucidum protein by adopting compound protease to prepare a ganoderma lucidum protein peptide compound solution; carrying out liquid chelation on the trace elements in the inorganic compound containing the trace elements and the ganoderma lucidum protein peptide in the ganoderma lucidum protein polypeptide compound solution by adopting a liquid chelation method, so as to prepare a ganoderma lucidum protein peptide-trace element chelation solution; and centrifuging, filtering and freeze-drying the ganoderma lucidum protein peptide-microelement chelate liquid to obtain the ganoderma lucidum protein peptide microelement chelate. According to the invention, the ganoderma lucidum protein from ganoderma lucidum is taken as a raw material, the extraction process of the ganoderma lucidum protein is optimized by an alkali-solution and acid-isolation method, and the activity of metal chelated calcium and metal chelated selenium is efficiently realized by controlling enzymolysis of compound protease and chelating active peptides by using calcium chloride and sodium selenite. The invention provides a new thought for the application of the ganoderma lucidum protein.

The disclosed method of treating a malignant solid tumor in a subject includes the steps of administering to the subject an immunomodulatory dose of a radioactive phospholipid ether metal chelate, a radiohalogenated phospholipid ether, or other targeted radiotherapy (TRT) agent that is differentially retained within malignant solid tumor tissue, and either (a) performing in situ tumor vaccination in the subject by introducing into at least one of the malignant solid tumors one or more agents capable of stimulating specific immune cells within the tumor microenvironment, or (b) performing immunotherapy in the subject by systemically administering to the subject an immunostimulatory agent, such as an immune checkpoint inhibitor. In a non-limiting example, the radioactive phospholipid ether metal chelate or radiohalogenated phospholipid ether has the formula:wherein R1 comprises a chelating agent that is chelated to a metal atom, wherein the metal atom is an alpha, beta or Auger emitting metal isotope with a half-life of greater than 6 hours and less than 30 days, or wherein R1 comprises a radioactive halogen isotope. In one such embodiment, a is 1, n is 18, m is 0, b is 1, and R2 is —N+(CH3)3.

The invention discloses an odorless temperature-controlled asphalt additive, odorless temperature-controlled asphalt and a preparation method of the odorless temperature-controlled asphalt. The odorless temperature control asphalt additive comprises the following components in parts by weight: 1-5 parts of odorless temperature control microcapsules; 1-5 parts of an auxiliary deodorant; 1-5 parts of a dispersant; the odor-removing temperature-control microcapsule comprises a composite shell material and a core material, the composite shell material comprises silicon dioxide / nano tourmaline / polydopamine, the core material comprises n-alkane with the phase change temperature of 40-60 DEG C, and a metal chelate and a smoke suppression compound containing active alpha-H are loaded on the surface of the composite shell material. The odorless temperature-controlled asphalt additive can efficiently and durably reduce the content of irritant gas in asphalt smoke, reduce the content of volatile organic compounds released by an asphalt pavement at high temperature, improve the high-temperature stability of asphalt and prolong the service time of the asphalt pavement, and provides a brand new idea for long-life and environment-friendly utilization of asphalt.

The invention discloses a dressing for skin wounds and a preparation method and application thereof, and belongs to the technical field of hydrogel. The dressing for the skin wound, provided by the invention, is prepared from the following raw materials: carboxymethyl cellulose, polyvinyl alcohol, a metal chelate, cannabidiol and tobramycin. The metal chelate is a TA / Fe chelate formed by chelating reaction of ferric ions and tannic acid. The dressing for skin wounds provided by the invention has excellent mechanical properties, adhesion performance, hemostasis, antibacterial and anti-inflammatory properties and an effect of promoting wound healing, and can be widely applied to preparation of medicines for treating wounds. In addition, the preparation method of the dressing for the skin wound is easy to operate, and practical application is facilitated.

The invention discloses a sludge conditioner with a nanoscale hydrophobic material loaded with a multi-core metal chelate, which is characterized by comprising the following components in percentage by weight: 10 to 20 percent of hydrophobic material, 30 to 35 percent of chelated iron solution, 10 to 15 percent of multi-core metal salt, 5 to 10 percent of dispersing agent, 2 to 5 percent of pH (Potential of Hydrogen) regulator and the balance of deionized water. The sludge conditioner can destroy EPS of a sludge system, dissolve microbial cells in the sludge, release bound water in the sludge and reduce electrostatic repulsion, so that the hydrophobicity of the microbial cells in the sludge is improved, free water and surface water are released, and the dehydration performance of the sludge is greatly improved.

The invention relates to the technical field of industrial flue gas purification, in particular to a desulfurization and denitrification integrated flue gas purification system and method.The desulfurization and denitrification integrated flue gas purification system comprises an integrated washing tower, and the washing tower sequentially comprises an atomization venturi section, a desulfurization section, a denitrification section, a desulfurization section and a denitrification section which are communicated in the flue gas flowing direction, and the atomization venturi section is used for conducting preliminary acceleration, cooling and dust particle pre-wetting on introduced flue gas; the rotational flow centrifugal section is used for enabling the flue gas and the washing liquid to generate strong rotary centrifugal motion so as to realize gas-liquid-solid primary separation and mass transfer; the boiling foam absorption section is used for enabling the washing liquid at the bottom of the tower to form a boiling foam layer through an air distribution device and flue gas with a specific flow speed so as to provide a huge gas-liquid contact area; the dehydrating and demisting section is used for separating liquid drops entrained in the purified flue gas; by skillfully combining NO trapping by metal chelating and wet desulfurization by calcium, alkali and method, the method is realized in a unique boiling centrifugal tower, dust removal, desulfurization and denitrification are synchronously and efficiently completed in one tower body, the system is compact, and the investment and operation cost is low.

An adhesive film for polarizing plates, a polarizing plate including the same, and an optical display apparatus including the same are provided. An adhesive film for polarizing plates is formed of an adhesive composition including a (meth)acrylic copolymer, an isocyanate curing agent, a metal chelate curing agent, and an antistatic agent, and has a surface resistance difference ΔSR of 1.0 (log(Ω / □)) or less, as calculated by Equation 1 and, in Equation 1, SR1 is 10 (log(Ω / □)) or less.

An amido group-containing monomer composition contains 80.00 to 99.99 mass % of an amido group-containing monomer (a) of the following formula (1) and 0.01 to 20.00 mass % of a metal chelate complex (b) having carbonyl group as a ligand:wherein R1 represents a hydrogen atom or a methyl group, R2 represents a hydrocarbon group having a carbon number of 1 to 6, R3 represents a hydrocarbon group having a carbon number of 1 to 23, and R4 represents hydrogen or a methyl group.

The invention relates to the technical field of agricultural biology, and particularly discloses a preparation method and application of a Chinese herbal medicine extract fertilizer for enhancing immunity, the preparation method comprises the following steps: S1, performing water extraction and alcohol precipitation extraction on Chinese herbal medicine raw materials to obtain a Chinese herbal medicine extracting solution and medicine residues; s2, crushing the obtained medicine residues, inoculating white-rot fungi or bacillus subtilis, and performing solid-state fermentation at the fermentation temperature of 25-35 DEG C for 5-7 days to obtain a fermentation product; s3, concentrating and drying the obtained Chinese herbal medicine extracting solution to obtain Chinese herbal medicine extract powder; s4, the obtained Chinese herbal medicine extract powder is mixed with humic acid, ferric salt or zinc salt is added, stirring reaction is conducted under the condition that the pH ranges from 5.0 to 6.5, and a Chinese herbal medicine-humic acid metal chelate is formed; chinese herbal medicine compound extraction and microbial solid fermentation are combined, and traditional waste medicine residues are converted into high-activity organic fertilizer carriers, so that efficient utilization of resources is realized, meanwhile, the immune induction function of the fertilizer is enhanced, and the disease resistance of crops is remarkably improved.

The invention provides a compound shown in a formula I or pharmaceutically acceptable salts, stereoisomers, isotope derivatives, solvates (such as hydrates), prodrugs, metal chelates, crystal forms or metabolites of the compound and application of the compound in the field of medicine. The compound can be used for treating and / or preventing psoriasis diseases, especially propafenone. The invention also finds that under the condition of the same administration dosage, the effect of smearing administration on treating psoriasis diseases is better than that of injection administration. Compared with a flecainib ointment with a similar anti-arrhythmia function, the propafenone ointment disclosed by the invention has a better effect on treating psoriasis diseases.

The invention relates to a preparation method and application of divalent metal ion chelated protein, which comprises the following steps: A, dissolving divalent metal ion salt and L-lysine in water, heating and stirring to obtain a lysine metal chelated salt solution for later use; b, heating and dispersing protein in water to obtain a protein dispersion liquid; c, adding the lysine metal chelate salt solution into the protein dispersion liquid, adding glutamine transaminase, and performing heat preservation and stirring to obtain a cross-linking reaction liquid; d, continuously heating the cross-linking reaction solution and keeping the temperature to obtain an enzyme inactivation reaction solution; and E, homogenizing the enzyme inactivation reaction liquid to obtain the protein chelated with the divalent metal ions. Amino acid is adopted to chelate divalent metal ions, and the problems that a traditional special medical emulsion product is poor in stability, prone to precipitation and the like due to the fact that insoluble mineral substances are used are solved.

Provided is a film for forming a protective film, which is formed from a resin composition that contains a polymer component, a thermosetting component, a crosslinking agent component, an epoxy-modified silicone oil, and an inorganic filler. The polymer component is an acrylic polymer, the thermosetting component comprises epoxy resin and a thermosetting agent, and the cross-linking agent component comprises a metal chelate and polyisocyanate. In addition, based on the total weight of the resin composition as 100 weight percent, the content of the epoxy modified silicone oil is 0.01 weight percent to 0.2 weight percent. Therefore, according to the film for forming the protective film, the resin composition containing the epoxy modified silicone oil is added, so that the film can be quickly torn off as required after being thermally bonded with a semiconductor wafer, and the film has reworkability.

The invention relates to a method for determining the chelation effect and the chelation rate of a compound amino acid microelement chelate. According to the determination method, the chelation effect and the chelation rate of the compound amino acid microelement chelate are determined through combination of an infrared spectroscopy method, an elemental analysis method and an anhydrous titration method, and the chelation effect comprises an action form and action intensity. The determination method comprises the following steps: weighing a compound amino acid trace metal chelate sample; taking a part of the to-be-detected powder and potassium bromide crystals, grinding together, pressing, measuring the infrared spectrum of the powder, and analyzing the chelation type and strength; taking another part of the to-be-detected powder, measuring the nitrogen content of the to-be-detected powder through an elemental analysis method, and calculating the total amount of amino acids in the sample; taking another part of the to-be-detected powder, removing inorganic salt in the to-be-detected powder, and drying; and dissolving the obtained solid powder, titrating without water, carrying out a blank experiment to eliminate the influence of reducing substances in the solution, and calculating to obtain the chelation rate. The method is simple and easy to operate and high in accuracy.

The present invention provides a nickel ion metal chelate affinity chromatography medium and a preparation method thereof. The nickel ion metal chelate affinity chromatography medium uses porous dextran gel microspheres as a matrix, and allyl glycidyl ether is bonded to the surface of the dextran gel microspheres. The allyl glycidyl ether is connected to ethylenediaminetetraacetic acid, and the ethylenediaminetetraacetic acid is complexed with nickel ions. The nickel ion metal chelate affinity chromatography medium uses the ethylenediaminetetraacetic acid to bond with allyl glycidyl ether, and the ethylenediaminetetraacetic acid can bind nickel ions. 2+ Carry out complexation and effectively improve the stability of chromatography media.

The application discloses a demetallization agent, a preparation method and application method thereof, and a use of a demetallization auxiliary agent. The demetallization agent comprises a core-shell structure, is composed of an organic material with a chelating functional group, and comprises a core and a shell layer. The core is a sub-micron organic polymer particle, and the shell layer is an amphiphilic polymer with a functional group of strong electrostatic adsorption and metal chelating capacity connected to the surface. The preparation method of the demetallization agent comprises the steps of initiating connection and preparing the demetallization agent. The demetallization auxiliary agent has strong chelating capacity in an aqueous phase, and can transfer the metal chelated by the demetallization agent to the demetallization auxiliary agent. In addition, the application of the demetallization agent and the demetallization auxiliary agent to non-acid crude oil demetallization is disclosed. The demetallization agent and the demetallization auxiliary agent are suitable for removing metals such as nickel and vanadium in crude oil, have high demetallization agent grafting rate, increase the contact time of the demetallization agent and the oil phase, and have the characteristics of low cost, easy production and environmental friendliness.

The problem of the present invention can be solved by an adhesive which contains a specific acrylic copolymer (A), an isocyanate compound (B), and a metal chelate (C), and which satisfies all of the following (1)-(3) after curing. (1) 3.0 * 10 < 4 > Pad; g '(-20) lt; 4.0 * 10 < 5 > Pa, (2) 5lt; g '(-20) / G' (200) lt; 17, (3) 2lt; tan delta (-20) / tan delta (200) lt; 6.5); wherein in the formula, G '(-20) refers to the storage modulus at-20 DEG C and 1 Hz, G' (200) refers to the storage modulus at 200 DEG C and 1 Hz, tan delta (-20) refers to the loss tangent at-20 DEG C and 1 Hz, and tan delta (200) refers to the loss tangent at 200 DEG C and 1 Hz.

The present invention provides a method for preparing a noble metal-sensitized nanoporous SnO2-based gas-sensitive material, which belongs to the field of advanced porous nanomaterials. The preparation method uses a diol as a solvent and a metal precursor modifier, and an amphiphilic block copolymer as a structural inducer; when the structural inducer co-assembles the SnO2 precursor and the noble metal precursor, the diol first chelates with the SnO2 precursor to form a metal chelate, and then forms a reverse composite micelle with the amphiphilic block copolymer; when the solvent is volatilized after the assembly is completed, the reverse composite micelle is further accumulated to form a super-macromolecular assembly, providing a skeleton for calcination, and forming a large-aperture mesoporous channel after calcination and decomposition of the structural inducer, thereby obtaining a noble metal-sensitized nanoporous SnO2-based gas-sensitive material. The synthesis method described in the present invention has low requirements on synthesis conditions, high reaction yield, is easy to industrialize, and can be applied to the development and application of various high-performance gas sensors.

The present disclosure provides for a metal chelated polyol liquid and / or a metal chelated polyether polyol liquid that can be used in an isocyanate-reactive composition and a reaction mixture for forming a polyurethane polymer. The metal chelated polyester polyol liquid is a reaction product of a chelating polyester polyol having a chelating moiety and a metal compound having a metal ion. The metal chelated polyether polyol liquid is a reaction product of a chelating polyether polyol having a chelating moiety and a metal compound having a metal ion. The chelating moiety of the chelating polyester polyol or the chelating polyether polyol chelates the metal ion to form the metal chelated polyester polyol liquid or the metal chelated polyether polyol liquid, respectively, having a mole ratio of the metal ion to the chelating moiety of 0.05:1 to 2:1.