A perylene-based light-converting agent and its preparation method

Abstract

This application provides a perylene-based light-converting agent and its preparation method, relating to the field of light-converting materials technology. The perylene-based light-converting agent has the general formula: [formula missing]; wherein R2, R3, and R4 are independently hydrocarbon groups. The perylene-based light-converting agent provided by this invention does not contain rare earth elements, reducing the potential risk of soil pollution. Simultaneously, the perylene derivative has a stable molecular structure and good photothermal stability, exhibiting slow decay of light conversion performance during long-term outdoor use. Its application in light-converting agricultural films can better meet application requirements.

Description

Technical Field

[0001] This application relates to the field of light-converting materials technology, and more specifically, to a perylene-based light-converting agent and its preparation method. Background Technology

[0002] In modern agricultural production, improving the light energy utilization efficiency of crops is one of the key factors in increasing yield and quality. Light-converting films, as a functional covering material, can convert wavelengths in the solar spectrum with low photosynthetic utilization rates (such as ultraviolet and green light) into specific wavelengths conducive to photosynthesis (such as deep red light), thereby significantly improving the photosynthetic efficiency of crops. While ultraviolet light in sunlight is abundant in energy, it cannot be directly used by plants for photosynthesis, and excessive ultraviolet radiation may even damage plant tissues. Among the light qualities required by plants, red and blue light play a crucial role in photosynthesis, especially deep red light with a wavelength of approximately 660 nm, which is located at the maximum red absorption peak of chlorophyll a and has the highest excitation efficiency for photosystem II, making it the core wavelength driving photosynthesis. Therefore, efficiently and stably converting ultraviolet and green light into deep red light is a key technological path to achieving high-performance light-converting films.

[0003] Currently, the luminescent materials used in commercially available light-converting films are mainly rare-earth complexes and organic fluorescent dyes. While rare-earth complexes can achieve certain wavelength conversion functions, the long-term use of rare-earth elements in agricultural environments may lead to bioaccumulation effects and potential ecological risks, the specific impacts of which are not yet fully understood. In contrast, organic fluorescent dyes have advantages such as high luminescence efficiency, easily tunable molecular structures to achieve specific wavelength emission, and greater environmental friendliness. However, organic light-converting agents are prone to photodegradation under long-term outdoor light exposure, leading to a decrease in luminescence efficiency, and it is often difficult to achieve a balance between luminescence efficiency, precise deep-red wavelength conversion, and long-term stability. Furthermore, the synthesis routes for high-performance light-converting materials are complex and costly, making it difficult to meet the needs of large-scale agricultural applications.

[0004] YF-660 molecules and their derivatives have wide applications under long-term photothermal load conditions such as solar cells, exhibiting excellent stability and effectively converting ultraviolet and green light into deep red light bands. However, the application of YF-660 molecules in photoconverting agricultural films has not been reported, and its traditional synthesis methods suffer from problems such as low yield, poor solubility, and difficulty in purification, which limits its industrial preparation and application.

[0005] Therefore, this application aims to provide a perylene-based light-converting agent and its preparation method to better solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this application is to provide a perylene-based light-converting agent and its preparation method. It innovatively uses YF-660 molecules as the light-converting material in the 660nm deep red light band of agricultural light-converting films, and adopts a four-step synthesis method to improve the solubility of intermediate products and increase the total yield to 70%. Without the need for complex and time-consuming processes such as column chromatography purification, it improves the purity of the final product, thereby better solving the above-mentioned technical problems.

[0007] This application provides a perylene-based light-converting agent with the general formula:

[0008] ;

[0009] Among them, R2, R3, and R4 are independently hydrocarbon groups.

[0010] Based on the same inventive concept, this application also provides a method for preparing the above-mentioned perylene-based optical conversion agent, the synthesis steps of which are as follows:

[0011] ;

[0012] Among them, R1, R2, R3, and R4 are independently hydrocarbon groups.

[0013] Further, in the synthesis step, specifically, compound 1 and the amino compound are added to propionic acid, heated to react and purify, to obtain compound 2.

[0014] Further, in the synthesis step, specifically, compound 2 and the hydroxy compound are added to a solvent, heated and purified to obtain compound 3; wherein the solvent is at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone.

[0015] Further, in the synthesis step, specifically, compound 3 is heated with a base in tert-butanol to obtain compound 4.

[0016] Further, in the synthesis step, specifically, compound 4 and the ortho-diamine compound are added to propionic acid, heated and purified to obtain compound 5 and compound 6. The specific reaction temperature in this step is 110℃~150℃, and the time is 7h~10h.

[0017] The beneficial effects of this invention are:

[0018] The preparation method provided by this invention requires only four steps in its synthetic route, with mild reaction conditions and a yield of >90% for each step. Compared with traditional synthetic methods, the yield is significantly improved, which is conducive to industrial production. The prepared perylene-based light-converting agent does not contain rare earth elements, reducing the potential risk of soil pollution. At the same time, the perylene derivative has a stable molecular structure and good photothermal stability. Its light conversion performance decays slowly during long-term outdoor use. When applied to light-converting agricultural films, it can efficiently convert ultraviolet and green light in the 300-500 nm range into deep red light around 660 nm, matching the maximum absorption peak of chlorophyll a in plants, thus driving photosynthesis more efficiently and better meeting application requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The emission spectrum of compound 5a synthesized in Example 1 of this invention;

[0021] Figure 2 This is the emission spectrum of compound 5b synthesized in Example 1 of the present invention. Detailed Implementation

[0022] To facilitate understanding of the present invention, it will be described more fully below through embodiments, and preferred embodiments are given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Any other implementation schemes obtained by modifying or equivalently substituting the technical solutions of the present invention without inventive step are all within the protection scope of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] The numerical values ​​disclosed in the embodiments of this invention are approximate values, not definitive values. Where error or experimental conditions permit, all values ​​within the error range may be included, and the specific numerical values ​​disclosed in the embodiments of this invention are not limited to those specified.

[0025] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0026] The following are specific examples.

[0027] Example 1

[0028] This embodiment provides a method for synthesizing compounds 5a and 6a. The structural formulas of compounds 5a and 6a are as follows:

[0029] ;

[0030] The specific synthesis steps are as follows:

[0031] Step 1: First, synthesize compound 2a. The structural formula of compound 2a is as follows:

[0032] ;

[0033] Compound 1 (10 g, 18.8 mmol) and diisopropylaniline (7.68 g, 43.4 mmol) were placed in a round-bottom flask, and sufficient propionic acid was added to dissolve them. After attaching a condenser, the mixture was heated to 130 °C in an oil bath with magnetic stirring and reacted vigorously for 8 h. After cooling, water was added to completely precipitate the product, and the solid product compound 2a was obtained by filtration, with a yield of up to 95%.

[0034] The structural formula of compound 1 is as follows:

[0035] ;

[0036] The proton NMR data of compound 2a are as follows:

[0037] 1 H NMR ( (ppm), DMSO-d6): 8.71 (s, 4H, ArH); 7.51 (t, 2H, ArH); 7.40 (d, 4H, ArH); 2.85 (m, 4H, -CH-); 1.09 (d, 24H, -CH3).

[0038] Step 2: Synthesis of compound 3a, its structural formula is as follows:

[0039] ;

[0040] Compound 2a (15 g, 17.8 mmol) and 4-tert-butylphenol (11.24 g, 74.76 mmol) were dissolved in excess N,N-dimethylformamide under alkaline conditions provided by K₂CO₃. The mixture was heated to 110 °C in an oil bath with magnetic stirring and refluxed for 5 h. After cooling, water was added to completely precipitate the product, which was then filtered to give compound 3a in 92% yield.

[0041] The proton NMR data for compound 3a are as follows:

[0042] 1 H NMR ( (ppm), CDCl3): 8.28 (s, 4H, ArH); 7.41 (dd, 2H, ArH); 7.25(m, 12H, ArH); 6.89 (d, 8H, ArH); 2.70 (m, 4H, -CH-); 1.28 (s, 36H, -CH3); 1.14 (d, 24H, -CH3).

[0043] Step 3: Synthesis of compound 4a, its structural formula is as follows:

[0044] ;

[0045] Compound 3a (21.35 g, 16.37 mmol) and potassium hydroxide (45.84 g, 0.8 mol) were placed in a round-bottom flask, and 12 mL of isopropanol was added to completely dissolve the solid. After attaching a condenser, the mixture was heated to 85 °C in an oil bath with magnetic stirring and reacted vigorously for 6 h. After cooling, the solid was obtained by filtration. The solid was dissolved in a mixed solvent of 12 mL acetic acid and 24 mL water, heated to 60 °C, and magnetically stirred for 2 h. After cooling to room temperature, the mixture was filtered and washed with water and alcohol to obtain compound 4a, with a yield of up to 90%.

[0046] The proton NMR data for compound 4a are as follows:

[0047] 1 H NMR ( (ppm), ): 8.27 (s, 4H, ArH); 7.24 (d, 8H, ArH); 6.86 (d,8H, ArH); 1.26 (s, 36H, -CH3).

[0048] Step 4: Synthesis of compounds 5a and 6a, their structural formulas are as follows:

[0049] ;

[0050] Compound 4a (14.51 g, 14.73 mmol) and 1,2-diaminobenzene (3.5 g, 32.41 mmol) were placed in a round-bottom flask, dissolved in sufficient propionic acid, and the mixture was heated to 130 °C in an oil bath with magnetic stirring and vigorous stirring for 8 h. After cooling, water was added to completely precipitate the product, and the solid products 5a and 6a were obtained by filtration, with a yield of up to 91%.

[0051] The proton NMR spectra of compounds 5a and 6a are as follows:

[0052] 1 H NMR ( (ppm), CDCl3): 8.54 (s, 1H, ArH); 8.52 (s, 1H, ArH); 8.47(m, 2H, ArH); 8.43 (s, 1H, ArH); 8.41 (s, 1H, ArH); 7.80 (m, 2H, ArH); 7.43(m, 4H, ArH); 7.26 (m, 10H, ArH); 6.88 (m, 8H, ArH); 1.31 (s, 36H, -CH3).

[0053] Example 2

[0054] This embodiment provides the synthesis of compounds 5b and 6b, whose structural formulas are as follows:

[0055] ;

[0056] Step 1: Synthesis of compound 2b, its structural formula is as follows:

[0057] ;

[0058] Compound 1 (10 g, 18.8 mmol) and diisopropylaniline (7.68 g, 43.4 mmol) were placed in a round-bottom flask, and sufficient propionic acid was added to dissolve them. After attaching a condenser, the mixture was heated to 130 °C in an oil bath with magnetic stirring and reacted vigorously for 8 h. After cooling, water was added to completely precipitate the product, and the solid product, compound 2, was obtained by filtration, with a yield of up to 95%.

[0059] The structural formula of compound 1 is as follows:

[0060] ;

[0061] The proton NMR data for compound 2b are as follows:

[0062] 1 H NMR ( (ppm), DMSO-d6): 8.71(s, 4H, ArH); 7.51(t, 2H, ArH); 7.40(d, 4H, ArH); 2.85(m, 4H, -CH-); 1.09(d, 24H, -CH3).

[0063] Step 2: Synthesis of compound 3b, its structural formula is as follows:

[0064] ;

[0065] Compound 2b (15.16 g, 17.86 mmol) and 4-octylphenol (14.72 g, 71.44 mmol) were dissolved in excess N,N-dimethylformamide under alkaline conditions with K₂CO₃. The mixture was heated to 110 °C in an oil bath with magnetic stirring and refluxed for 5 h. After cooling, water was added to completely precipitate the product, which was then filtered to give compound 3b in 91% yield.

[0066] The 3b proton NMR data are as follows:

[0067] 1 H NMR ( (ppm), ): 8.28(s, 4H, ArH); 7.41(dd, 2H, ArH); 7.25(m, 12H,ArH); 6.88(d, 8H, ArH); 2.71(m, 4H, -CH-); 1.26(m, 60H, -CH2-); 1.13(d, 24H,-CH3); 0.88(t, 12H, -CH3).

[0068] Step 3: Synthesis of compound 4b, its structural formula is as follows:

[0069] ;

[0070] Compound 3b (20.44 g, 16.25 mmol) and potassium hydroxide (45.36 g, 0.81 mol) were placed in a round-bottom flask, and 12.5 mL of isopropanol was added to completely dissolve the solid. After attaching a condenser, the mixture was heated to 85 °C in an oil bath with magnetic stirring and reacted vigorously for 6 h. After cooling, the solid was obtained by filtration. The solid was dissolved in 12.5 mL of acetic acid and 25 mL of water, heated to 60 °C, and stirred magnetically for 2 h. After cooling to room temperature, the mixture was filtered and washed with water and alcohol to obtain compound 4b, with a yield of up to 92%.

[0071] The 4b proton NMR data are as follows:

[0072] 1 H NMR ( (ppm), ): 8.28 (s, 4H, ArH); 7.25 (m, 8H, ArH); 6.88 (d,8H, ArH); 1.26 (m, 60H, -CH2-); 0.88 (t, 12H, -CH3).

[0073] Step 4: Synthesis of compounds 5b and 6b, their structural formulas are as follows:

[0074] ;

[0075] Compound 4b (18.09 g, 14.95 mmol) and 1,2-diaminobenzene (6.52 g, 59.80 mmol) were placed in a round-bottom flask, dissolved in sufficient propionic acid, and the mixture was heated to 130 °C in an oil bath with magnetic stirring and vigorous stirring for 8 h. After cooling, water was added to completely precipitate the product, which was then filtered to obtain compounds 5b and 6b in yields of up to 90%.

[0076] The 5b and 6b proton NMR data are as follows:

[0077] 1 H NMR ( (ppm), CDCl3): 8.55 (s, 1H, ArH); 8.53 (s, 1H, ArH); 8.48(m, 2H, ArH); 8.44 (s, 1H, ArH); 8.42 (s, 1H, ArH); 7.81 (m, 2H, ArH); 7.44(m, 4H, ArH); 7.27 (m, 10H, ArH); 6.89 (m, 8H, ArH); 1.27 (m, 60H, -CH2-); 0.89 (t, 12H, -CH3).

[0078] Example 3

[0079] This embodiment provides the synthesis of compounds 5c and 6c, whose structural formulas are as follows:

[0080] ;

[0081] Step 1: Synthesis of compound 2c, its structural formula is as follows:

[0082] ;

[0083] Compound 1 (10 g, 18.8 mmol) and diisopropylaniline (7.68 g, 43.4 mmol) were placed in a round-bottom flask, and sufficient propionic acid was added to dissolve them. After attaching a condenser, the mixture was heated to 130 °C in an oil bath with magnetic stirring and reacted vigorously for 8 h. After cooling, water was added to allow the product to precipitate completely, and the solid product compound 2c was obtained by filtration, with a yield of up to 95%.

[0084] The structural formula of compound 1 is as follows:

[0085] ;

[0086] The proton NMR data of compound 2c are as follows:

[0087] 1 H NMR ( (ppm), DMSO-d6): 8.71(s, 4H, ArH); 7.51(t, 2H, ArH); 7.40(d, 4H, ArH); 2.85(m, 4H, -CH-); 1.09(d, 24H, -CH3).

[0088] Step 2: Synthesis of compound 3c, its structural formula is as follows:

[0089] ;

[0090] Compound 2c (15 g, 17.8 mmol) and 4-tert-butylphenol (11.24 g, 74.76 mmol) were dissolved in excess N,N-dimethylformamide under alkaline conditions provided by K₂CO₃. The mixture was heated to 110 °C in an oil bath with magnetic stirring and refluxed for 5 h. After cooling, water was added to completely precipitate the product, which was then filtered to obtain compound 3c in a yield of up to 92%.

[0091] The 3C proton NMR data are as follows:

[0092] 1 H NMR ( (ppm), CDCl3): 8.28(s, 4H, ArH); 7.41(dd, 2H, ArH); 7.25(m,12H, ArH); 6.88(d, 8H, ArH); 2.71(m, 4H, -CH-); 1.27(s, 36H, -CH3); 1.13(d,24H, -CH3).

[0093] Step 3: Synthesis of compound 4c, its structural formula is as follows:

[0094]

[0095] Compound 3c (21.35 g, 16.37 mmol) and potassium hydroxide (45.84 g, 0.8 mol, 50 eqv) were placed in a round-bottom flask, and 12 mL of isopropanol was added to completely dissolve the solid. After attaching a condenser, the mixture was heated to 85 °C in an oil bath with magnetic stirring and reacted vigorously for 6 h. After cooling, the solid was obtained by filtration. The solid was dissolved in a mixed solvent of 12 mL acetic acid and 24 mL water, heated to 60 °C, and magnetically stirred for 2 h. After cooling to room temperature, the mixture was filtered and washed with water and alcohol to obtain compound 4c, with a yield of up to 90%.

[0096] The 4c ​​proton NMR data are as follows:

[0097] 1 H NMR ( (ppm), ): 8.27(s, 4H, ArH); 7.24(d, 8H, ArH); 6.86(d, 8H, ArH); 1.26(s, 36H, -CH3).

[0098] Step 4: Synthesis of compounds 5c and 6c, their structural formulas are as follows:

[0099]

[0100] Compound 4c (14.50 g, 14.7 mmol) and 4,5-dimethoxy-1,2-phenylenediamine (9.88 g, 58.8 mmol) were placed in a round-bottom flask, dissolved in sufficient propionic acid, and the mixture was heated to 130 °C in an oil bath with magnetic stirring and vigorous stirring for 8 h. After cooling, water was added to completely precipitate the product, and the solid products 5c and 6c were obtained by filtration, with a yield of up to 92%.

[0101] The 5c and 6c proton NMR spectra are as follows:

[0102] 1 H NMR ( (ppm), CDCl3): 8.55 (s, 1H, ArH); 8.53 (s, 1H, ArH); 8.48(m, 2H, ArH); 8.44 (s, 1H, ArH); 8.42 (s, 1H, ArH); 7.94 (m, 2H, ArH); 7.27(m, 10H, ArH); 6.89 (m, 8H, ArH); 3.83 (s, 12H, -CH3); 1.27 (m, 60H, -CH2-); 0.89 (t, 12H, -CH3).

[0103] Example 4

[0104] This embodiment provides the synthesis of compounds 5d and 6d, whose structural formulas are as follows:

[0105] ;

[0106] Step 1: Synthesis of compound 2d, its structural formula is as follows:

[0107]

[0108] Compound 1 (10 g, 18.8 mmol) and diisopropylaniline (7.68 g, 43.4 mmol) were placed in a round-bottom flask, and sufficient propionic acid was added to dissolve them. After attaching a condenser, the mixture was heated to 130 °C in an oil bath with magnetic stirring and reacted vigorously for 8 h. After cooling, water was added to completely precipitate the product, and the solid product compound 2d was obtained by filtration, with a yield of up to 95%.

[0109] The structural formula of compound 1 is as follows:

[0110] ;

[0111] The 2d proton NMR data are as follows:

[0112] 1 H NMR ( (ppm), DMSO-d6): 8.71(s, 4H, ArH); 7.51(t, 2H, ArH); 7.40(d, 4H, ArH); 2.85(m, 4H, -CH-); 1.09(d, 24H, -CH3).

[0113] Step 2: Synthesis of compound 3d, its structural formula is as follows:

[0114]

[0115] Compound 2d (15.16 g, 17.86 mmol) was dissolved in excess N,N-dimethylformamide under alkaline conditions with K₂CO₃. The mixture was heated to 110 °C in an oil bath with magnetic stirring and refluxed for 5 h. After cooling, water was added to completely precipitate the product, which was then filtered to obtain compound 3d in a yield of up to 92%.

[0116] The 3D proton spectrum data are as follows:

[0117] 1 H NMR ( (ppm), CDCl3): 8.29(s, 4H, ArH); 7.42(dd, 2H, ArH); 7.27(m,4H, ArH); 6.73(d, 4H, ArH); 6.47(s, 4H, ArH); 6.33(d, 4H, ArH); 3.82(d, 24H,-CH3); 2.71(m, 4H, -CH-); 1.13(d, 24H, -CH3).

[0118] Step 3: Synthesis of compound 4d, its structural formula is as follows:

[0119] ;

[0120] Compound 3d (18.81 g, 16.43 mmol) and potassium hydroxide (45.92 g, 0.82 mol) were placed in a round-bottom flask, and 12.5 mL of isopropanol was added to completely dissolve the solid. After attaching a condenser, the mixture was heated to 85 °C in an oil bath with magnetic stirring and reacted vigorously for 6 h. After cooling, the solid was obtained by filtration. The solid was dissolved in 12.5 mL of acetic acid and 25 mL of water, heated to 60 °C, and magnetically stirred for 2 h. After cooling to room temperature, the mixture was filtered and washed with water and alcohol to obtain compound 4d, with a yield of up to 91%.

[0121] The 4d proton NMR data are as follows:

[0122] 1 H NMR ( (ppm), CDCl3): 8.32(s, 4H, ArH); 6.74(d, 4H, ArH); 6.47(s,4H, ArH); 6.32(d, 4H, ArH); 3.83(d, 24H, -CH3);

[0123] Step 4: Synthesis of compounds 5d and 6d, their structural formulas are as follows:

[0124]

[0125] Compound 4d (14.97 g, 14.95 mmol) and o-phenylenediamine (6.46 g, 59.8 mmol) were placed in a round-bottom flask, dissolved in sufficient propionic acid, and the mixture was heated to 130 °C in an oil bath with magnetic stirring and vigorous stirring for 8 h. After cooling, water was added to allow the product to precipitate completely, and the solid products 5d and 6d were obtained by filtration, with a yield of up to 95%.

[0126] The 5d and 6d proton NMR spectral data are as follows:

[0127] 1 H NMR ( (ppm), CDCl3): 8.52 (s, 1H, ArH); 8.50 (s, 1H, ArH); 8.44(m, 2H, ArH); 8.40 (s, 1H, ArH); 8.35 (s, 1H, ArH); 7.81 (m, 2H, ArH); 7.44(m, 4H, ArH); 7.27 (m, 2H, ArH); 6.74(d, 4H, ArH); 6.47(s, 4H, ArH); 6.32(d,4H, ArH); 3.83(d, 24H, -CH3).

[0128] The light-converting agent, low-density polyethylene (LDPE), anti-aging agent, and antioxidant prepared in Example 1 were mixed in a certain mass ratio, melt-blended at high temperature using a twin-screw extruder, and then extruded and granulated to obtain light-converting masterbatch. The prepared light-converting masterbatch was mixed with LDPE resin in a certain mass ratio and blown into a film at high temperature using an agricultural film blow molding machine. The film thickness was controlled to obtain the light-converting agricultural film. The absorption and emission wavelengths were compared with those of other commercially available light-converting films; the results are shown in the table below.

[0129] Types of light conversion film Absorption wavelength range / nm Emission wavelength range / nm Example 2 300-400, 500-650 <![CDATA[630-700(λ max =661nm)]]> Lumogen Red F 300 540-590 600-630 <![CDATA[Eu(BTC)(H2O)6]]> 250-350 590-630 <![CDATA[Eu(TTA)3TPPO2]]> 200-400 380-420, 600-630

[0130] As can be seen from the table above, the light conversion film made from the light conversion agent prepared in Example 1 has a larger maximum absorption wavelength and a larger maximum emission wavelength than commercially available light conversion films, and can better meet application requirements.

[0131] In summary, the preparation method provided by this invention is simple, easy to prepare, and has a high yield, which can meet the needs of industrial production. The prepared perylene-based light-converting agent does not contain rare earth elements, reducing the potential risk of soil pollution. At the same time, the perylene derivative has a stable molecular structure and good photothermal stability. Its light conversion performance decays slowly during long-term outdoor use. When applied to light-converting agricultural films, it can efficiently convert 300-500 nm ultraviolet-visible light into deep red light around 660 nm, precisely matching the maximum absorption peak of chlorophyll a in plants, driving photosynthesis more efficiently, and thus better meeting application requirements.

[0132] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A perylene-based light-converting agent, characterized in that, The general formula is: ； Among them, R2, R3, and R4 are independently hydrocarbon groups.

2. The method for preparing the perylene-based optical conversion agent according to claim 1, characterized in that, The synthesis steps are as follows: ； Among them, R1, R2, R3, and R4 are independently hydrocarbon groups.

3. The method for preparing the perylene-based optical conversion agent according to claim 2, characterized in that, In the synthesis step, specifically, compound 1 and an amino compound are added to propionic acid, heated to react and purify, and then compound 2 is obtained.

4. The method for preparing the perylene-based optical conversion agent according to claim 3, characterized in that, In the synthesis step, specifically, compound 2 and the hydroxy compound are added to a solvent, heated and purified to obtain compound 3; wherein the solvent is at least one of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, and N-methylpyrrolidone.

5. The method for preparing the perylene-based optical conversion agent according to claim 4, characterized in that, In the synthesis step, specifically, compound 3 was heated with a base in tert-butanol to obtain compound 4.

6. The method for preparing the perylene-based optical conversion agent according to claim 5, characterized in that, In the synthesis step, specifically, compound 4 and the ortho-diamine compound are added to propionic acid, heated to react and purify, and then compound 5 and compound 6 are obtained.

7. The method for preparing the perylene-based optical conversion agent according to claim 6, characterized in that, Compound 4 and the ortho-diamine compound were added to propionic acid, and the mixture was heated to react and purified to obtain compounds 5 and 6. The reaction temperature was 110℃~150℃ and the reaction time was 7h~10h.

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