66 results about "Diimide" patented technology

The invention provides a polyglutamic acid granular fertilizer and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving lignin in an alkaline solution, and heating until the lignin is dissolved; adding epsilon-polylysine fermentation liquor, mixing, heating, adding a formaldehyde solution, and carrying out grafting reaction to obtain epsilon-polylysine grafted lignin; s2, mixing the epsilon-polylysine grafted lignin solution and the gamma-polyglutamic acid solution, adding N-hydroxysuccinimide, standing at a low temperature, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and mixing; carrying out gradient temperature reaction to obtain lignin grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel; and S3, homogenizing the lignin-grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel, carrying out normal-temperature high-pressure airflow crushing, and spraying the crushed hydrogel to the surfaces of particles obtained by granulating a basic material through high-pressure electrostatic spraying, so as to obtain the polyglutamic acid granular fertilizer. The obtained polyglutamic acid granular fertilizer has relatively strong water-retaining and slow-release (releasing water, urea and the like) effects.

The application discloses an anticoagulant biomaterial for blood purification and a preparation method and application thereof, and comprises the following steps: providing an amphiphilic copolymer P(AA-MMA); blending polyethersulfone, P(AA-MMA) and a solvent, stirring at a set temperature to obtain a casting solution, and preparing a blending membrane from the casting solution; soaking the blending membrane in a 2-morpholine-4-yl ethanesulfonic acid buffer solution containing argatroban, 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide and hydroxy succinimide, and reacting at room temperature to obtain an argatroban grafted blending membrane, namely the anticoagulant biomaterial. The method improves the hydrophilicity of the membrane, reduces the albumin adsorption of the membrane, reduces the adhesion of platelets on the membrane, prolongs the coagulation time APTT, PT and TT of the membrane, and is better in biocompatibility and enhanced in anticoagulation performance.

The application discloses a siloxane D-A-D type perylene diimide small-molecule electronic transport layer and a preparation method thereof. Bromine perylene diimide is reacted with a primary amine containing a siloxane end group, and then is coupled with triphenylamine through a Suzuki coupling reaction to synthesize a small-molecule conjugated electrolyte. The siloxane D-A-D type perylene diimide small-molecule electronic transport layer has the following beneficial effects: first, the secondary amine in the side chain can form hydrogen bonds with F and H in the active layer, improve the interface compatibility, and improve the contact with the active layer; second, the D-A-D structure can realize intramolecular charge transfer, and excellent electron mobility can be exhibited; third, a good n-type self-doping is obtained, the work function of a high-stability metal Ag can be reduced, an ohmic contact is formed, and therefore the photovoltaic performance of a device is significantly improved; fourth, the stability can be improved due to the hydrophobicity of the siloxane; and finally, triphenylamine has a special non-planar molecular structure, and can inhibit excessive aggregation of the material.

The application relates to the technical field of compound synthesis, and discloses an aromatic dipeptide functionalized mercapto compound, 3,5-di(triphenylmethylthio)benzoic acid is obtained by adding 3,5-di(methylmercapto)benzoic acid and pyridine into a solution of chloromethyl triphenylphosphonium, purifying after sufficient reaction; then the 3,5-di(triphenylmethylthio)benzoic acid is mixed with N-hydroxysuccinimide and dissolved in an organic solvent, EDC.HCl is added, purifying after sufficient reaction; then 2,5-dioxopyrrolidin-1-yl 3,5-bis(triphenylmethylthiomethyl)benzoate is obtained; then phenylalanine-tryptophan and triethylamine are added, purifying after sufficient reaction; then (3,5-bis(triphenylmethylthiomethyl)benzoyl)tryptophylphenylalanine is obtained; then trifluoroacetic acid and triethylsilane are added, purifying after sufficient reaction; and finally the aromatic dipeptide functionalized mercapto compound is obtained. The aromatic dipeptide functionalized mercapto compound can quickly and effectively identify sodium and potassium ions, and has relatively low detection limit and relatively loose detection condition.

This invention belongs to the field of pharmaceutical chemistry technology, and discloses a compound and its uses. Specifically, it relates to a CRBN small molecule ligand compound based on a pyridazine-glutarimide core skeleton (PDG), its composition, and its application. It also relates to a protein degrading agent based on a CRBN small molecule ligand compound based on a pyridazine-glutarimide core skeleton (PDG) and its application. Specifically, the CRBN small molecule ligand compound is shown in (Ⅰ): wherein R... 1 and R 2 Selected from one or more of the following: fused rings attached to a pyridazine core, H, alkyl, OR, F, CN, CF3, NR2, Ph, 4-Py; Y selected from one or more of CH, CD, CF, and N; R 3 Selected from one or more of OR, NR2, CHR2, and C≡CR; R 4 Selected from H or alkyl.

This invention provides a method for constructing a donor-acceptor type perylene diimide-based porous conjugated polymer probe and detecting methamphetamine and amphetamine solutions. The method synthesizes donor-acceptor type perylene diimide-based porous conjugated polymer probes with different topologies by combining an electron acceptor perylene diimide derivative and an electron donor aggregation-induced emission fluorophore via a succinate coupling reaction. When used for the detection of methamphetamine and amphetamine, this system exhibits a clear ratiometric fluorescence response, with the fluorescence color gradually changing from yellow-green to orange and orange-red, demonstrating a significant ratiometric fluorescence response. It features fast response speed, high detection sensitivity, good selectivity, and no interference from other common structurally and property-similar substances, enabling the differentiation and identification of methamphetamine and amphetamine.

This invention discloses a photosensitizer with twisted π-conjugated charge transfer properties, its preparation method, and its applications. The preparation method of the photosensitizer includes the following steps: dissolving a quinolino[3,2,1-de]acridin-5,9-dione derivative, a perylene diimide with brominated position, and a basic substance in a first solvent to obtain a mixture; reacting a palladium catalyst with the mixture under a protective atmosphere; and after the reaction, extracting and purifying to obtain the photosensitizer with twisted π-conjugated charge transfer properties. The photosensitizer prepared by this invention uses a perylene diimide photoabsorbent group as an electron acceptor, which is then coupled with an electron donor group through a ring-closure reaction to prepare a photosensitizer with a twisted π-conjugated structure. The compound prepared by this invention has a long excited-state lifetime, high intersystem crossing efficiency, and suitable energy level structure, making it an ideal candidate material for photosensitizers and suitable for upconversion luminescence systems and visible light photocatalytic oxidation reactions.

The application belongs to the technical field of photocatalytic materials, and particularly relates to a porous organic polymer based on perylene diimide and a preparation method and photocatalytic application thereof. The porous organic polymer is a cross-linked polymer based on perylene diimide derivatives. The molecular structure of the perylene diimide derivatives is that the polymer is formed by the perylene diimide derivatives through a Friedel-Crafts reaction or a Suzuki coupling reaction. Under light conditions, the sulfur benzamide compound can be photocatalytically oxidized and cyclized into a 1,2,4-thiadiazole compound quickly and with high selectivity.

The invention belongs to the technical field of polyurethane nano-film preparation, and relates to a preparation method of a high-moisture-permeability static-pressure-resistant double-effect enhanced polyurethane nano-film, which comprises the following steps: uniformly stirring and mixing perylene diimide fused ring modified waterborne polyurethane emulsion, polydopamine pre-polymerized emulsion, a defoaming agent and a flatting agent to obtain a mixed solution, coating base cloth with the mixed solution, and drying to obtain the high-moisture-permeability static-pressure-resistant double-effect enhanced polyurethane nano-film. And drying and stripping to obtain the high-moisture-permeability static-pressure-resistant double-effect enhanced polyurethane nano film. According to the preparation method of the high-moisture-permeability static-pressure-resistant double-effect enhanced polyurethane nano-film, perylene diimide fused ring modified polyurethane with a rigid plane structure and strong pi-pi stacking capacity and polydopamine with self-polymerization capacity and surface anchoring characteristic are compounded for application, so that the high-moisture-permeability static-pressure-resistant double-effect enhanced polyurethane nano-film is prepared; a hydrogen bond network between a phenolic hydroxyl group of polydopamine and a carbonyl group of polyurethane provides dynamic crosslinking, so that a core-shell structure is formed, efficient water molecule transmission is realized, and the water penetration resistance is remarkably enhanced.

The present disclosure provides redox flow batteries with long duration or long life for energy storage applications. The water-soluble perylene diimide molecule can be used as an energy storage material in an anode chamber. The water-soluble ferrocenyl molecules can be used as energy storage materials in cathode chambers. The redox flow battery has a negligible cross permeability across the membrane.

The invention discloses a CoOxT-perylene diimide composite photocatalyst with a size effect and a preparation method and application thereof.The preparation method comprises the steps that biuret, perylene 3, 4, 9, 10 tetracarboxylic dianhydride, anhydrous zinc acetate and imidazole are subjected to a first reaction, and a perylene diimide photocatalyst is prepared; and dispersing the perylene diimide photocatalyst in water, then adding a cobalt source, carrying out a second reaction, then carrying out rotary evaporation, and annealing at 250-400 DEG C in argon. By changing the annealing temperature, the size of the CoOx nano particles can be regulated and controlled, and the CoOx nano particles have good photocatalytic water decomposition and oxygen evolution performance. More importantly, the CoOx nanoparticles have a size effect on photocatalytic water decomposition oxygen evolution, that is, the CoOxT at perylene diimide shows regularly-changed oxygen evolution performance along with the change of the size of the CoOx nanoparticles. The method is mild in operation, easy to control, good in reproducibility and high in material yield.

Provided are: a resin composition capable of producing a molded article having improved durability; and a molded article comprising the resin composition. A resin composition containing a semi-aromatic polyamide having a structural unit represented by formula (1), a glass fiber having a flat cross-sectional shape, and a carbodiimide. In formula (1), Ar1 represents a phenylene group or a naphthylene group, and a plurality of Ar1 groups contained in the semi-aromatic polyamide may be the same as or different from each other. And p is an integer of 4-12.

The invention discloses a novel perylene diimide coordination polymer as well as a preparation method and application thereof, and belongs to the technical field of coordination polymers. The chemical formula of the novel perylene diimide coordination polymer provided by the invention is C44H20Cl4N4O8Zn, and the novel perylene diimide coordination polymer has good thermal stability and chemical stability, can stably exist in a 100 DEG C aqueous solution, an acetonitrile solution or an N, N-dimethylformamide solution for 24 hours, and can resist the heat up to 300 DEG C in a nitrogen atmosphere. Besides, the novel perylene diimide coordination polymer provided by the invention has the characteristics of high conversion rate and high chemical stability as a photocatalyst, has extremely high photocatalytic activity on a reaction of converting aryl acetic acid into an aryl formaldehyde derivative, and is low in dosage.

The application discloses a preparation method of a perylene diimide porous organic polymer material and application thereof, and belongs to the technical field of porous organic polymer materials. The preparation method is as follows: 1,6,7,8-tetrachloroperylene-3,4,9,10-tetracarboxylic dianhydride, triamine monomers and diphenyl sulfone are uniformly mixed and transferred into a glass tube, and then, after being cooled by liquid nitrogen, the glass tube is subjected to melt sealing under a vacuum state; then, the sealed glass tube is transferred into a muffle furnace to be heated to perform a polyimide reaction to obtain a product; after the reaction is completed, the product is taken out, and then, the product is subjected to grinding, washing and vacuum drying in sequence to obtain the perylene diimide porous organic polymer. After the perylene diimide porous organic polymer is treated by an organic amine, an excellent light-heat conversion material is obtained. The perylene diimide porous organic polymer has high light-heat conversion efficiency after being treated by the organic amine, and has the advantages of simple synthesis, high yield and good stability, and is suitable for being used as the light-heat conversion material, and has a good application prospect in the field of solar water evaporation.

The invention relates to a plant cultivation method for modifying at least one agricultural property of a cultivated plant where the agricultural property is susceptible to modification by irradiating at least part of the plant with light comprising the steps of (a) providing at least one light source emitting a first spectrum comprising a wavelength of 300 to 900 nm; (b) subjecting said first spectrum to a partial or full conversion to obtain a second spectrum comprising a wavelength of 680 to 900 nm by means of at least one color converter wherein the obtained second spectrum has higher intensities of light at wavelengths of 680 to 900 nm compared to the first spectrum; and (c) irradiating at least part of the cultivated plant with the second spectrum obtained in step (b); wherein the at least one color converter comprises in a polymeric matrix material at least one terrylene diimide compound of formula (I) wherein the variables are as defined in the claims and the description. The present invention also relates to the use of said terrylene diimide compound of formula (I) in a color converter for providing horticulture light comprising a wavelength in the range from 680 to 900 nm.

The invention relates to the technical field of coating film repairing lubricating oil, and particularly discloses a preparation method of efficient coating film repairing lubricating oil, molybdenum disulfide forms a directionally arranged layered structure on a friction surface, the friction coefficient can be effectively reduced, molybdenum disulfide and zinc dialkyl dithiophosphate cooperate to jointly construct a MoS2-ZnPO4 composite repairing layer, the bearing capacity is improved, and the service life of the lubricating oil is prolonged. The polytetrafluoroethylene reduces friction fluctuation under the condition of convenient lubrication and enhances the chemical stability of a repair layer, the calcium sulfonate neutralizes acidic wear products and prevents corrosive wear, the polyisobutylene succinimide prevents molybdenum disulfide, polytetrafluoroethylene and graphite from agglomerating, it is guaranteed that nano particles are evenly dispersed in the base oil, the storage stability is improved, and the wear resistance is improved. And the polymethacrylate anchors the metal surface through a polar group, so that the adhesive force of a repair layer is improved, a stable MoS2-ZnPO4-PTFE composite film can be formed on the friction surface, the friction power consumption is reduced, the preparation cost is low, and the oily adsorption effect is good.

The application relates to the field of organic synthesis, in particular to a preparation method and application of a glutarimide compound, which comprises the following steps: reacting a compound II and a formamide in the presence of formic acid to prepare a compound I. The preparation method adopts glutaric acid compounds and formamide as starting materials, only needs to add a catalytic amount of formic acid in a reaction system, and can obtain a yield of more than 80% without using any additional reaction solvent.

This invention belongs to the field of lubricating oil additives, specifically relating to a soot-dispersible polyisobutylene succinimide dispersant, its preparation method, and its application. The preparation method includes the following steps: (1) mixing polyisobutylene maleic anhydride, base oil, and aromatic solvent, stirring evenly, heating, adding polyethylene polyamine, introducing nitrogen gas, heating to the aromatic reflux temperature, and performing an amidation reaction to obtain product 1; (2) adding aminophenylboronic acid to product 1, continuing reflux, borizing reaction, removing the solvent by vacuum distillation, filtering, and obtaining the soot-dispersible polyisobutylene succinimide dispersant. The dispersant in this invention has the characteristic of good soot dispersion performance. The prepared product can improve the soot dispersion of oil products with a lower dosage. Moreover, the use of aminophenylboronic acid for borization reaction can improve high-temperature detergency. The preparation process of this invention is simple and easy to implement.

The invention relates to the technical field of organic solar cell electron transport layers, and provides a naphthalimide electron transport layer and a preparation method thereof. The naphthalimide electron transport layer has a structural formula as shown in a formula (I). The synthesis process is simple, an intermediate product does not need to be separated, histidine, 1, 4, 5, 8-naphthalene tetracarboxylic anhydride and N, N-dimethyl dipropyl triamine are used as raw materials, and the naphthalene diimide electron transport layer is prepared through two-step continuous reaction in an N, N-dimethyl formamide (DMF) solvent. And amido in an acyl polar side chain endows the material with environment-friendly water / alcohol-soluble green processing. Meanwhile, due to the fact that the NDI-His-NN based on the histidine imidazole ring contains more nitrogen atoms, the work function of an Ag electrode is reduced, the interface potential barrier is remarkably reduced, ohmic contact is formed, extraction and transmission of charges are promoted, and finally the performance of the organic solar device is improved.

The invention provides the preparation method of the efficient photocatalyst which is simple and convenient, does not contain noble metals or toxic metals and does not need a cocatalyst. In the invention, a strategy for synergistically improving the catalytic performance of the zinc indium sulfide by introducing the perylene diimide polymer is provided. The preparation method comprises the following steps: firstly, obtaining Lysine-PDI in a manner of polymerizing perylene diimide and lysine, and successfully preparing N%-Lysine-PDI-ZIS by adding the Lysine-PDI in a synthesis process of a zinc indium sulfide (ZIS) solvothermal method. Pure water is used as a solution to carry out photocatalytic hydrogen peroxide generation reaction. When the compounding ratio is 3%, the catalytic activity reaches the highest, is 9.956 mmol.g.h (5 min), and is 5.8 times of that of an original ZIS catalyst. The prepared catalyst is high in activity and good in stability, and a new way is provided for developing efficient and stable photocatalytic hydrogen peroxide production materials.

A method for detecting perfluorooctane sulfonic acid (PFOS) in an aqueous sample, the method including exciting the aqueous sample alone at a wavelength in a range of approximately 480 to 500 nm, contacting the aqueous sample with a detection reagent comprising a perylene-diimide-based cationic fluorophore, exciting the detection reagent and aqueous sample combination at a wavelength in a range of approximately 480 to 500 nm, and further quantifying a change in a fluorescence intensity of the detection reagent while in contact with the sample relative to the fluorescence intensity of the detection reagent prior to being contacted with the sample.

The application discloses a carboxymethyl-beta-cyclodextrin modified covalent organic framework nanosheet / aramid nanofiber composite nanofiltration membrane and a preparation method thereof. Carboxyl groups in carboxymethyl-beta-cyclodextrin are activated by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide, and activated carboxymethyl-beta-cyclodextrin is obtained. The activated carboxymethyl-beta-cyclodextrin aqueous solution and a COF nanosheet dispersion liquid are uniformly mixed, and the obtained precipitate is washed and dispersed in deionized water at room temperature, so that a CM-beta-CD@COF nanosheet dispersion liquid is obtained. The CM-beta-CD@COF nanosheet dispersion liquid and an ANF / water suspension liquid are uniformly mixed, so that a CM-beta-CD@COF / ANF composite dispersion liquid is obtained. The CM-beta-CD@COF / ANF composite nanofiltration membrane is obtained by assembling according to a vacuum filtration method. The carboxymethyl-beta-cyclodextrin modified covalent organic framework nanosheet / aramid nanofiber composite nanofiltration membrane has no defects, high permeability and high selectivity, and balances the permeability and selectivity of the composite nanofiltration membrane.

The application belongs to the technical field of metal organic framework materials and electrocatalytic materials, and particularly relates to a metal organic framework semiconductor material based on 1,4,5,8-naphthalene tetracarboxylic diimide and a preparation method and application thereof. The material is represented by a formula M(Py-NDI)2(Cl)2, wherein M=Co, Ni; the material is a single crystal material, has a two-dimensional layered structure, belongs to a monoclinic system, a p21 / c space group, a node is a M-N4 structure, one M(II) is coordinated with two chlorine ions and four pyridine groups in a ligand, the two-dimensional layered structure is formed by AB stacking to form a 3D M-cMOF single crystal structure, and the material prepared by the application has simple synthesis steps, mild required conditions, and the obtained two-dimensional sheet structure single crystal material has high conductivity, high stability and high efficient electrocatalytic oxygen reduction activity.

The invention relates to an asymmetric adhesion bionic hydrogel dressing and a preparation method thereof. The preparation method is characterized by comprising the following steps: (1) dissolving acrylamide and acrylic acid in water; then adding N, N '-methylene bisacrylamide and N, N, N', N '-tetramethylethylenediamine, then adding FeCl3 and ammonium persulfate, and carrying out crosslinking to obtain upper-layer hydrogel; (2) adding protocatechuic acid, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide into the hydroxypropyl chitosan solution, so as to obtain an adhesive layer; and (3) coating one surface of the upper-layer hydrogel with the adhesion layer, and curing at room temperature to obtain the asymmetric adhesion bionic hydrogel dressing. The asymmetric adhesion bionic hydrogel dressing has the advantages that one surface of the prepared asymmetric adhesion bionic hydrogel dressing has good adhesion performance and is used for being adhered to a wound, and the other surface of the asymmetric adhesion bionic hydrogel dressing is low in adhesion performance; the adhesive composition can be firmly adhered to tissues and can prevent the generation of bad adhesion.

The invention relates to the technical field of photodynamic therapy, in particular to a synthesis method of an algae integrated oxygen supply platform based on OLED photoelectric shielding material modification, and the method comprises the following steps: step 1, selecting a photoelectric material based on pentaperylene diimide (PPD), including PPD derivatives modified by PPD-Se, PPD-Te and PPD-Br and containing heavy atoms as a core photosensitizer; step 2, mixing a photoelectric material based on PPD, a PEG derivative containing PPD-Se and a responsive chemical bond, and DSPE-PEG-S-S-NHH through a coprecipitation method, and stirring for 1-6 hours at the temperature of 30-70 DEG C to form PPD type photoelectric material nano-particles with the particle size within the range of 80-120 nm, namely PPD-based NPs; step three, pretreatment and compounding of green algae: chlorella, scenedesmus and chlamydomonas are used as oxygen supply carriers, the surface of the green algae is modified through carboxymethyl chitosan CMCS, and carboxyl groups are introduced; and step 4, combining the modified PPD type photoelectric material nano particles with the microalgae through amido bonds, so as to form the microalgae-photoelectric material composite system Alga (at) PPD-based.

A high temperature stable spin-on-carbon ("SOC") material is provided that fills in topographical features on a substrate while planarizing its surface in a one-step thin layer coating process. The material comprises a low molecular weight polyimide or diimide that is pre- imidized in solution rather than on a wafer. The SOC layer can survive harsh CVD conditions and is resistant to SC1, particularly on TiN and SiOx surfaces.

The invention relates to a novel solar-driven water purification material, in particular to composite polymer hydrogel as well as a preparation method and application thereof. The technology belongs to the crossing field of environmental engineering, material science and renewable energy sources. The preparation method comprises the following steps: mixing an initiator, N-isopropylacrylamide, N, N-methylene bisacrylamide, a surfactant and water to form a mixed solution; the mixed solution is subjected to a polymerization reaction, and PNIPAm hydrogel is obtained; the PNIPAm hydrogel is immersed in an aqueous solution of perylene diimide and triethylamine, nitric acid is added, in-situ compounding is carried out, and the composite polymer hydrogel is obtained. The composite hydrogel has sensitive thermal response performance, remarkable hydrophilic-hydrophobic conversion can occur near the critical temperature, and the separation process can be directly driven by solar energy through the photothermal conversion effect of perylene diimide.

Organic photovoltaics (OPVs) based on a slot-die coated ternary blends for low-intensity light harvesting are disclosed herein. The ternary blends comprise either a N-annulated perylene diimide-based electron acceptor material or an aalkyl-12,13-dihydro[1,2,5] thiadiazolo[3,4e]thieno[2″,3″:4′,5] thieno[2′,3′:4,5] pyrrolo[3,2-g] thieno [2′,3′:4,5]thieno [3,2-b]indole-2,10-diyl)bis(methanylylidene)) bis(3-oxo-2,3-dihydro1H-indene-2,1-diylidene))dimalononitrile) (BTP)-based electron acceptor material, a second acceptor material, and an electron donor material which comprises poly[(2,5-bis(2-hexyldecyloxy) phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c] [1,2,5]thiadiazole)] (PPDT2FBT). In an aspect, a N-annulated perylene diimide dimer (tPDI2N-EH, PDI) acceptor material was incorporated into a blend of donor polymer material (PPDT2FBT) and fullerene acceptor [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) material to give ternary bulk heterojunction (BHJ) blends. In a further aspect, a BTP-based electron acceptor material was incorporated into a blend of donor polymer material (PPDT2FBT) and fullerene acceptor [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) material to give ternary bulk heterojunction (BHJ) blends.

The invention relates to the technical field of Keggin type polyacid compounds, and particularly discloses a Keggin type polyacid complex modified by a naphthalene diimide ligand as well as a preparation method and application of the Keggin type polyacid complex. The molecular formula of the Keggin type polyacid complex is Cu2 (H2O) 6 [BBPT] 3 [H4W12O40]. 3H2O. The invention also discloses a preparation method of the Keggin type polyacid complex. The Keggin type polyacid complex provided by the invention has excellent photocatalytic activity, when the Keggin type polyacid complex is applied to a photocatalytic CO2 reduction reaction, after illumination is performed for 9 hours, the CO yield is 1781 nmol, the mass normalization CO output rate is 6.59 nmol.mg <-1 >. H <-1 >, the CO product selectivity is about 99.7%, CO2 is efficiently and selectively reduced into CO, and the Keggin type polyacid complex has a wide application prospect in the field of solar-driven CO2 resource utilization.

The invention relates to the technical field of photochromic coordination polymers, in particular to a naphthalimide-based photochromic coordination polymer and a preparation method thereof. The chemical formula of the naphthalimidogen photochromic coordination polymer is [Sr (AlaNDI) (18-C-6)] n, AlaNDI is deprotonated (2S, 2 'S)-2, 2'-(1, 3, 6, 8-tetraoxo-1, 3, 6, 8-tetrahydrobenzo [1mn] [3, 8] phenanthroline-2, 7-diyl)-dipropionic acid), and AlaNDI is deprotonated (2S, 2 'S)-2, 2'-(1, 3, 6, 8-tetraoxo-1, 3, 6, 8-tetrahydrobenzo [1mn] [3, 8] phenanthroline-2, 7-diyl)-dipropionic acid. The 18-C < 6 > is 18-crown-6; the naphthalimide-based photochromic coordination polymer is a trigonal system, the space group is P3212, under the irradiation of a xenon lamp, the color of the coordination polymer is quickly changed into dark brown from light yellow within 30 seconds, a wide absorption band extending to a near-infrared region appears, and an obvious photochromic behavior is shown.