60 results about "Naphthalene diimide" patented technology

The invention relates to the technical field of catalysts, and discloses a preparation method and application of a copper-based metal-organic framework catalytic material.The preparation method comprises the following steps that S1, cuprous salt, N, N '-bis (5-aminonicotinyl) naphthalimide and a solvent are mixed, and a mixture is obtained; s2, heating the mixture to a reaction temperature, carrying out a constant-temperature reaction, and cooling to obtain a crystal; and S3, washing and drying the crystal to obtain the copper-based metal-organic framework catalytic material. According to the preparation method of the copper-based metal-organic framework catalytic material provided by the invention, N, N '-bis (5-aminonicotinyl) naphthalimide is used as an organic ligand to prepare the copper-based metal framework Cu-PTD with N / O co-coordination, and the copper-based metal framework Cu-PTD has relatively strong electrocatalytic carbon dioxide reduction and electron transfer capabilities; and the catalyst has relatively high selectivity on electrocatalytic carbon dioxide reduction products.

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a naphthalimide derivative (NDI-8) through a subject and an object. The crystalline supramolecular polymer (NDI-8 (at) CLPalpha) can fully utilize the synergistic effect of a plurality of weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The p-xylene in the NDI-8-coated CLPalpha p-xylene isomer has efficient identification and detection capability, the color is changed from purple to light pink, and a wide application prospect is provided for the development of stimuli-responsive materials.

The preparation method comprises the following steps: carrying out reflux reaction on 4-bromo-1, 8-naphthalic anhydride and primary amine in an organic solvent to obtain an intermediate product, and carrying out C-N coupling reaction on the intermediate product, a compound containing a nitrogen secondary amine electron-donating group, alkali and a catalyst in the organic solvent to obtain the double-state emission fluorescent dye. The two-state emission dye is obtained. An amino auxochrome group of a bridge ring structure is modified in a 4-bromine-1, 8-naphthalimide parent, the fluorescence quantum yield of the dye in a polar solvent is improved through the characteristic that nitrogen atom lone pair electrons of the nitrogen-containing bridge ring structure are not easy to overturn, and pi-pi stacking, which is not beneficial to emission, of the dye is inhibited through the large steric hindrance effect of the bridge ring structure; the dye shows bright fluorescence emission in non-polar and polar solvents, also has a very strong fluorescence quantum yield in a solid state, and shows a quantum yield greater than 94% when the dye is dispersed in an EVA (Ethylene-Vinyl Acetate) film.

The invention discloses a cellulose acetate based 1, 8-naphthalimide fluorescent probe for detecting Hg < 2 + > as well as a preparation method and application of the cellulose acetate based 1, 8-naphthalimide fluorescent probe. The preparation method comprises the following steps: by taking 4-bromo-1, 8-naphthalic anhydride as a raw material, carrying out condensation reaction on the 4-bromo-1, 8-naphthalic anhydride and 4-aminobutyric acid to prepare 4-(4-bromo-1, 8-naphthalic diimide) butyric acid (BNA-B); the BNA-B and piperazine are subjected to a substitution reaction, and a compound PNA-B is prepared; the PNA-B and 4-(bromomethyl) pyridine hydrochloride are subjected to a substitution reaction, and a compound PNA-B is prepared; and the PNA-B and cellulose acetate (CA) are subjected to an esterification reaction, such that the cellulose acetate-based 1, 8-naphthalimide fluorescent probe PNA-CA is prepared. The compound can specifically recognize Hg < 2 + >, after Hg < 2 + > is added into a PNA-CA acetonitrile / PBS buffer solution under 365nm ultraviolet irradiation, the fluorescence color of the solution is changed from colorless to yellow, the response time is 20s, the detection limit reaches 9.3 * 10 <-8 > M, and the probe has a good application prospect.

This invention discloses a cellulose acetate-based 1,8-naphthalenedimide fluorescent probe for detecting hydrazine, its preparation method, and its application. The invention uses 4-bromo-1,8-naphthalenedimide as a raw material, which undergoes a condensation reaction with 4-aminobutyric acid to obtain 4-(4-bromo-1,8-naphthalenedimide)butyric acid (BNA-B); BNA-B undergoes a coupling reaction with 4-formylphenylboronic acid to obtain 4-(4-(4-formylphenyl)-1,8-naphthalenedimide)butyric acid (FNA-B); compound FNA-B then undergoes an esterification reaction with cellulose acetate (CA) to obtain the cellulose acetate-based 1,8-naphthalenedimide fluorescent probe FNA-B-CA. This compound specifically recognizes hydrazine. Under 365 nm ultraviolet light irradiation, the addition of hydrazine to a DMF / H2O solution of FNA-B-CA changes the fluorescence color of the solution from bright blue to colorless, indicating a detection limit of 8.4 × 10⁻⁶ for hydrazine. ‑8 M has promising applications as a fluorescent probe for the detection of hydrazine.

The invention discloses a cellulose acetate based 1, 8-naphthalimide fluorescent probe for detecting hydrazine as well as a preparation method and application of the cellulose acetate based 1, 8-naphthalimide fluorescent probe. The preparation method comprises the following steps: by taking 4-bromo-1, 8-naphthalic anhydride as a raw material, carrying out condensation reaction on the 4-bromo-1, 8-naphthalic anhydride and 4-aminobutyric acid to prepare 4-(4-bromo-1, 8-naphthalic diimide) butyric acid (BNA-B); the preparation method comprises the following steps: carrying out a coupling reaction on BNA-B and 4-formyl phenylboronic acid to prepare 4-(4-(4-formyl phenyl)-1, 8-naphthalimidoyl) butyric acid (FNA-B); and the compound FNA-B and cellulose acetate (CA) are subjected to an esterification reaction, such that the cellulose acetate-based 1, 8-naphthalimide fluorescent probe FNA-B-CA is prepared. The compound can specifically recognize hydrazine, after hydrazine is added into a DMF / H2O solution of FNA-B-CA under the irradiation of 365nm ultraviolet light, the fluorescence color of the solution is changed from bright blue to colorless, the detection limit of hydrazine reaches 8.4 * 10 <-8 > M, and the compound has a good application prospect as a fluorescent probe for detecting hydrazine.

The present invention belongs to the technical field of semiconductor materials, and discloses a polymer with alternating arrangement of perylene diimide and naphthalene diimide, and its preparation method and application. The preparation method of the polymer includes the following steps: mixing naphthalic anhydride, alkanolamine and an organic solvent, and reacting to obtain naphthalene diimide-diol; mixing naphthalene diimide-diol, bromoacetic acid, 4-dimethylaminopyridine, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and an organic solvent, and reacting to obtain naphthalene diimide-dibromide; mixing naphthalene diimide-dibromide, perylene diimide-diamine and an organic solvent, and reacting to obtain the polymer. The present invention takes naphthalene diimide and perylene diimide as the core structures, and through design and synthesis, obtains a polymer with good water and alcohol solubility. This polymer can integrate the physical and chemical properties of the above two structural units, providing a guarantee for its application as an electron transport layer material in solar cells.

The invention discloses a wavelength selective photoresponse strontium-based metal organic framework eutectic material as well as a preparation method and application thereof. A metal node of the material is strontium ions, N, N '-bis (5-isophthalic acid) naphthalimide is used as a ligand, anthracene and a derivative thereof are used as objects, N, N-dimethylformamide is used as a solvent, and the material is obtained through solvothermal reaction. The material is composed of an electron donor (D) and an electron acceptor (A), and is a strontium-based MOF eutectic with an infinitely extended pi stacked A-D-D-A configuration. The MOF eutectic material has lattice characteristics of a tetragonal crystal system, a space group is I 41 / a, and cell parameters are a = b = 28.42240 (10), c = 13.71600 (10), and alpha = beta = gamma = 90 degrees. Sr-NDI at An has unique wavelength selective photoresponse property: ultraviolet light triggers [4 + 4] dimerization of an object anthracene, red light excites [4 + 2] reaction of anthracene and singlet oxygen, and near-infrared light induces generation of free radicals.

The present invention relates to naphthalene diimides, NDIs, and methods of synthesising them. The NDIs have DNA-quadruplex binding and stabilising activity, and potential in treatment of pancreatic, prostate, and other human cancers. The NDIs are a compound of Formula I:

The invention relates to the technical field of material chemistry, and provides an aperture regulation and control method and application of a naphthalimide hydrogen bond organic framework. By changing the ratio of N, N-dimethylformamide to water, the hydrogen bond interaction between water and 2, 7-bis (4H-1, 2, 4-triazole-4-yl) benzo [lmn] [3, 8] phenanthroline-1, 3, 6, 8 (2H, 7H)-tetraone is changed, so that the pore size of the naphthalimido hydrogen bond organic framework is regulated and controlled. When the water content is relatively low, the self-hydrogen-bond aggregation characteristic of water is weakened by DMF, the hydrogen bond interaction between water and NDIT is enhanced, and large-aperture NDIT-HOF-1 is obtained; when the water content is increased, the self hydrogen bond aggregation characteristic of water is enhanced, so that the hydrogen bond interaction between water and NDIT is weakened, and small-aperture NDIT-HOF-2 is obtained. An NDIT-HOF pore channel contains an electron-rich nitrogen site from triazole and an electron-rich oxygen site from water, and a nitrogen-oxygen synergistic adsorption site can realize selective adsorption of Th (IV). The water participating in framework assembly also enhances the hydrophilic performance of the NDIT-HOF, accelerates adsorption kinetics, realizes rapid adsorption of Th (IV) in a complex environment, and has a good application prospect.

The invention belongs to the field of inorganic enrichment materials, and discloses a preparation method of a lithium enrichment material precursor, which comprises the following steps: mixing a lithium-containing solution with an AlCl3 solution, adding an alkaline reagent for reaction to generate a chloride of lithium-aluminum double hydroxide, cleaning the chloride of lithium-aluminum double hydroxide, and carrying out preliminary crushing to obtain a lithium-aluminum double hydroxide precursor; and carrying out ball milling on the crushed product to obtain precursor powder, carrying out heat treatment on the precursor powder, adding a naphthalimide solution, and removing the solvent to obtain the lithium-enriched material precursor. According to the preparation method of the lithium-enriched material precursor, the precursor with better adhesion with the resin matrix can be manufactured, so that the adsorbability and the mechanical property of the final product lithium-enriched material are integrally improved.

[Problem] To provide a sealant composition for a protective film layer, said sealant composition being made of a resin and being cured at a lower temperature than the firing temperature of an overcoat agent comprising a glass paste. [Solution] This sealant composition for a protective film layer is characterized by including: a bisnadimide compound that is represented by chemical formula 1 and in which a divalent hydrocarbon group (R1) is bonded to nitrogen atoms of imide groups having norbornene skeletons; a phenolic resin; and a reactive diluent that has one or more epoxy groups. A resin cured film that has superior heat resistance can be formed using this composition, and thus this composition can be used as a sealant for a protective film layer of a chip resistor, a chip capacitor, or similar.

The invention belongs to the technical field of photo-thermal catalytic materials, and relates to a preparation method and application of a trioxytriphenylamine covalent organic framework with near-infrared photo-thermal catalysis Suzuki reaction performance, and the preparation method comprises the following steps: taking triamino trioxytriphenylamine NH2-TANG as an organic ligand, taking naphthalimide NDI as a linking group, and carrying out a solvothermal method to prepare the trioxytriphenylamine covalent organic framework with near-infrared photo-thermal catalysis Suzuki reaction. The trioxytriphenylamine covalent organic framework TANG-NDI COFs with the near-infrared photothermal catalysis Suzuki reaction performance is prepared, and the synthesis route of the trioxytriphenylamine covalent organic framework TANG-NDI COFs is NH2-TANG + NDI-TANG-NDI COFs. The trioxytriphenylamine covalent organic framework TANG-NDI COFs prepared by the method disclosed by the invention can catalyze the Suzuki reaction of chlorides under the irradiation of a near-infrared LED (Light Emitting Diode) with the wavelength of 650-850 nm, so that the Suzuki reaction yield of the chlorides is almost the same as that of bromides and iodates, the yield is 80% or above, the heat source cost is saved by 40%, and the catalyst can be recycled.

The present invention is entitled: Naphthalene diimide derivatives incorporating piperidine as cathode interface materials for organic solar cells. This invention relates to the field of materials science, specifically to a compound and its applications, preparation methods, organic solar cell cathode interface materials, and organic solar cells. The structure of the compound is as follows: [structure omitted for brevity]. Wherein, n is a natural number between 0 and 6, and X1 and X2 are independently selected from [selections omitted for brevity]. This compound can be used as a cathode interface material for organic solar cells, achieving high photoelectric conversion efficiency. By incorporating piperidine, the photostability of the material is improved, exhibiting stronger photostability compared to commonly used tertiary amine side chain naphthalene diimide derivatives. This compound can also be applied to devices such as organic light-emitting diodes and perovskite solar cells.

The present invention relates to a polymer solar cell comprising an electron transport layer including a novel diimide derivative that comprises a naphthalene diimide or perylene diimide backbone. Since the polymer solar cell according to the present invention comprises an electron transport layer including an electrolyte composed of the diimide derivative, which can replace a ZnO thin film, a high-temperature process is not required during the manufacture of the polymer solar cell, and a high-efficiency inverted type polymer solar cell can be produced.

The invention provides a near-infrared two-region aggregation-induced emission material, a preparation method thereof and application of the near-infrared two-region aggregation-induced emission material in preparation of I-type photodynamic drugs, and belongs to the technical field of biomedical engineering. The NDA / BA nano-particles are constructed by taking the obtained near-infrared two-region aggregation-induced emission material as a donor and thiaphthalimide as a receptor and integrating the donor and the receptor through poloxamer F127, and the NDA / BA nano-particles are further used for preparing I-type photodynamic drugs. The NDA / BA nano-particles show remarkably enhanced I-type photodynamic performance, the total active oxygen,. OH and O2 <.-> generation amount of the NDA / BA nano-particles are remarkably increased, the NDA / BA nano-particles are proved to have accurate near-infrared two-region imaging and photodynamic therapy effects, and a new scheme with a wide prospect is provided for near-infrared two-region image guided photodynamic diagnosis and treatment integration.

The present invention relates to naphthalene diimides, NDIs, and methods of synthesising them. The NDIs have DNA-quadruplex binding and stabilising activity, and potential in treatment of pancreatic, prostate, and other human cancers. The NDIs are a compound of Formula I:

This invention discloses a series of zirconium-based MOFs and their preparation methods and applications for electrochromic thin films, specifically involving two MOF materials with electrochromic properties. The materials are framework materials with one-dimensional channels, one example having a unique csq topology. The metal is zirconium, and the ligand is a tetracarboxylic acid ligand containing a naphthalimide group. The one-dimensional channels include triangular channels with a diameter of 1.2 nm and hexagonal channels with a diameter of 2.7 nm. Both MOFs crystallize in the hexagonal P6 / mmm crystal system. The cell parameters of NKM-908 are a = b = 40.285, c = 23.6990, α = β = 90°, γ = 120°. The cell parameters of NKM-908-TPDC-X are a = b = 40.54, c = 23.45, α = β = 90°, γ = 120°. Here, X represents different substituents modified by the linear dicarboxylic acid ligand side chain. This application also provides the two methods for preparing the aforementioned MOF thin films, which feature simple processes, mild reaction conditions, and good reproducibility. The NKM-908 electrochromic thin film can achieve reversible color switching, changing from essentially colorless to light yellow and then to green. The NKM-908-TPDC-X thin film exhibits different color changes depending on the difference in X.

The invention belongs to the technical field of photocatalytic material preparation, and relates to a preparation method and application of a decatungstate-containing hybrid material, in particular to application of the decatungstate-containing hybrid material in a photocatalytic aryl acetic acid decarboxylation reaction. The preparation method comprises the following steps: taking N, N '-bis (3, 5-dimethyl-1H-2-pyrrolyl)-1, 4, 5, 8-naphthalimide, tetrabutyl phosphonium decatungstate and zinc nitrate hexahydrate as raw materials, stirring in a mixed solvent, and standing to obtain the decatungstate-containing hybrid material. The material has the advantages of higher thermal stability, low requirement on synthesis equipment, simplicity and convenience in operation, low cost and large-scale production, can be used for catalyzing the oxidative decarboxylation reaction of aryl acetic acid to generate corresponding aryl formaldehyde under the irradiation of visible light, has the characteristics of high conversion rate and high chemical stability, and is suitable for industrial production. And the catalyst has extremely high catalytic activity for converting aryl acetic acid into aryl formaldehyde through oxidative decarboxylation.

The invention relates to a naphthalene diimide small molecule, a ring-expanded naphthalene diimide small molecule and a preparation method and application thereof, and the preparation method of the ring-expanded naphthalene diimide small molecule comprises the following steps: in an inert gas atmosphere, adding a brominated naphthalene diimide small molecule into a second organic solvent, then adding a sulfur salt, and carrying out a heating reaction to obtain the ring-expanded naphthalene diimide small molecule. Obtaining a crude product; and purifying the crude product to obtain the ring-expanded naphthalene diimide micromolecule. Compared with the prior art, the compound has certain molecular weight and is easy to synthesize, hydrophilic side chains are introduced in the long-axis direction of molecules, so that the hydrophilicity and solubility of the compound are improved, good thermal stability is shown, and solution processing of the compound can be achieved.

A method for detecting and discriminating between per- and poly-fluoroalkyl substances (PFAS) in an aqueous sample includes exciting the aqueous sample alone at a wavelength of between 330 - 390 nm, contacting the sample with a detection reagent comprising a naphthalene diimide-based cationic fluorophore, exciting the detection reagent and sample together at the excitation wavelength, and quantifying a change in a fluorescence emission 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.

Provided herein are naphthalene diimide (NDI) compounds and their use in thin films, methods of making thin films, photovoltaic devices comprising NDI thin films, and methods of making photovoltaic devices comprising NDI thin films. Additionally contemplated are organic light-emitting diodes comprising NDI thin films, photodetectors comprising NDI thin films, and organic field-effect transistors (OFETs) comprising NDI thin films.

The invention belongs to the technical field of composite material preparation, and particularly discloses a high-performance carbon fiber / epoxy resin composite material and a preparation method thereof. The preparation method comprises the following steps: heating and refluxing 3, 4, 9, 10-perylenetetracarboxylic dianhydride, amine-terminated polyether D230, triethylamine and N, N-dimethylformamide in a nitrogen atmosphere, so as to prepare perylene naphthalene diimide; mixing the precursor with graphene oxide in N, N-dimethylformamide, and carrying out a heating reaction to obtain lt; pDI, GOgt; the preparation method comprises the following steps: dissolving the raw materials in an acetone solution, mixing with bisphenol A epoxy resin and 4, 4 '-methylenebis (2-ethyl) aniline, and carrying out vacuumizing defoaming and curing reaction to obtain 1t; pDI, GOgt; modified epoxy resin; removing a sizing agent from the carbon fibers to obtain DCF, and then immersing the DCF into lt; pDI, GOgt; drying the N, N-dimethylformamide solution to obtain modified carbon fibers; immersing the mixture at the temperature of 1t; pDI, GOgt; and carrying out pressurizing and heating reaction in modified epoxy resin, and cooling to obtain the high-performance carbon fiber / epoxy resin composite material. The high-performance carbon fiber / epoxy resin composite material has the characteristics of high strength, high toughness and excellent stress concentration resistance, and has remarkable industrial application value.

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 discloses a coordination polymer containing substituted polyacid and naphthalimide as well as a preparation method and application of the coordination polymer, and belongs to the technical field of preparation of photocatalytic materials. The coordination polymer containing substituted polyacid and naphthalimide is a two-dimensional metal organic framework material formed by coordination of nitrogen oxide on N, N '-bis ((4-N' '-pyridyl oxide) methyl)-1, 4, 5, 8-naphthalimide, phosphomolybdate ions and europium ions. The preparation method provided by the invention is low in requirement on synthesis equipment, simple and convenient to operate, low in cost, short in preparation time and capable of realizing large-scale production, and the prepared coordination polymer containing substituted polyacid and naphthalimide is high in crystallinity and good in condition. The prepared coordination polymer containing substituted polyacid and naphthalimide as a photocatalyst has the characteristics of high quantum efficiency, high conversion rate and high chemical stability, has extremely high degradation efficiency on environmental pollutants such as basic red 9 and methyl blue, and has very good practical value and application prospect.

The invention belongs to the field of multifunctional optical materials, and particularly relates to a photothermal programmed regulation and control multicolor dynamic room-temperature phosphorescent pyridinium naphthalimide doped polymer film and application of the photothermal programmed regulation and control multicolor dynamic room-temperature phosphorescent pyridinium naphthalimide doped polymer film. Different pyridine structural units (such as 4-aminopyridine, aminomethylpyridine and 3-aminopyridine) are introduced into light-responsive naphthalimide nitrogen sites, then a series of pyridinium naphthalimide derivatives (NDI-1, NDI-2 and NDI-3) are synthesized, and then the pyridinium naphthalimide derivatives are doped into a rigid polyvinyl alcohol matrix to construct the composite film. And the multifunctional polymer film with photochromism, thermochromism and room-temperature phosphorescence multi-dynamic adjustable multi-stimulus response is prepared. The method has important application potential in the fields of dynamic advanced anti-counterfeiting, high-density information storage, intelligent optical sensing and photoresist dye.

The application discloses a hydrogen-bonded organic framework eutectic material, a preparation method thereof and application thereof in photocatalytic degradation of pollutants, and the hydrogen-bonded organic framework eutectic is a eutectic formed by assembling N,N'-di(5-m-phenylenediformyl) naphthalene diimide hydrogen-bonded organic framework and hexa-peri-hexabenzocoronene. The eutectic material has both porous structure and intermolecular charge transfer interaction. The hydrogen-bonded organic framework eutectic can efficiently photocatalyze removal of phenol which is difficult to degrade and highly toxic, and has great application value.

The present invention discloses a preparation and application of a salicylaldehyde Schiff base solid-state dual-mode optical switch based on full visible light regulation, wherein the molecular formula is as shown in Formula I, wherein the salicylaldehyde Schiff base provides the fluorescence properties and light response potential of the material, and the introduction of a large-volume 1,8-naphthalene diimide structure at the para position of its hydroxyl group can weaken the close packing of molecules in the solid state, increase the intermolecular spacing, and facilitate the photoisomerization behavior of the molecules, thereby making the rapid light response in the solid state possible. The salicylaldehyde Schiff base provided by the present invention not only shows a fast and reversible response, but also shows a significant change in the dual-mode of its own reflection color and fluorescence color, and the "on"-"off" process of this type of optical switch molecule can be regulated by two wavelengths of visible light, which greatly reduces the damage to the environment and personnel. Therefore, the material has a good application prospect in the fields of new generation optical switches, reversible erasing of optical information and anti-counterfeiting, information encryption, etc.

The invention discloses a donor-acceptor type chiral macrocyclic eutectic material as well as a preparation method and application thereof, and belongs to the field of luminescent materials. The chemical formula of the eutectic material is C76H52N6O12, and the chemical formula is C76H52N6O12. The crystal belongs to an orthorhombic system, and the space group is P212121. The invention also provides a preparation method of the eutectic material, and the preparation method comprises the following steps: dissolving cyclotrimeric naphthalene diimine and pyrene in a solvent, and reacting to obtain the eutectic material. When the cyclotrimeric naphthalene diimine is in an R type, an R type eutectic material is obtained; and when the cyclotrimeric naphthalene diimine is S-type, obtaining the S-type eutectic material. The synthesis method has the advantages of simplicity, low production cost, mild reaction conditions and suitability for large-scale production. The material is a crystalline pure organic eutectic material, has the optical properties of circularly polarized light of dark red and near-infrared emission and two-photon excited dark red and near-infrared emission, is easy to process and stable, and has certain device potential.

The invention discloses a preparation method and application of a metal Salen active site embedded zirconium-based metal organic framework, and belongs to the technical field of metal organic framework materials and photocatalysis. The invention particularly relates to a method for embedding M-Salen active sites containing different metals into a Zr-MOFs (NKM-908) material with a one-dimensional pore channel. According to the Zr-MOFs material, zirconium is used as metal, tetracarboxylic acid containing a naphthalimide group is used as a ligand, and the Zr-MOFs material has a unique csq topological structure. The preparation method comprises the following steps: embedding a carboxyl-containing M-Salen complex (M = Co, Cu, Co2 or Cu2) into NKM-908 through coordination of carboxyl and a Zr6 cluster, so as to obtain the M-NKM-908. The composite material can show the performance of efficient photocatalytic reduction of CO2 to prepare synthesis gas under visible light, and has the advantages of high activity, highly adjustable synthesis gas proportion and strong catalyst stability. The method provides a new way for efficient conversion of CO2 and precise preparation of synthesis gas, and has high industrial application value.