Polymer Phosphorescent Materials with Red Room Temperature Afterglow Emission without Aromatic Rings, Halogens and Metal Elements and Preparation Method Thereof

Abstract

The present invention belongs to the field of polymer luminescent materials, and particularly relates to a polymer phosphorescent material without aromatic rings, halogens and metal elements and having red room temperature afterglow emission, and a preparation method thereof. Maleimide monomers and vinyl monomers undergo anionic copolymerization under the action of a catalyst or autocatalysis to prepare a branched polymer; the branched polymer is fully mixed with polyvinyl alcohol to form an amorphous transparent phosphorescent polymer film. The polymer is composed of unconventional chromophores such as imide groups, amide groups or tertiary amine groups, and room temperature afterglow emission from green to red can be achieved by changing the comonomers, pretreatment methods and excitation wavelengths. The polymer film has rich adjustable room temperature afterglow properties, has a phosphorescent emission of up to 630 nm, and has a red room temperature afterglow with a chromaticity of (0.56, 0.39), a long phosphorescent lifetime, and has the advantages of simple and efficient preparation method, low price, environmental friendliness, etc.

Description

Technical Field

[0001] The present invention belongs to the field of polymer luminescent materials, and particularly relates to a polymer phosphorescent material without aromatic rings, halogens and metal elements and having red room-temperature afterglow emission, and a preparation method thereof. Background Art

[0002] Room-temperature phosphorescence (RTP) materials have attracted people's attention due to their unique production process and long-lived excited states. Different from fluorescent materials, RTP materials can directly observe ultra-long afterglow emission from several seconds to dozens of seconds. Among them, organic polymer phosphorescent materials have always been a hot topic of concern. On the one hand, polymer materials play an irreplaceable role in the field of organic flexible electronics, such as organic light-emitting diodes, solar cells, storage devices, field-effect transistors, etc., which mainly benefits from their good flexibility, easy processing, low cost, and high electron mobility. On the other hand, both inorganic and organometallic complex phosphorescent materials have the disadvantages of high cost, high toxicity, and difficult preparation, while organic polymer phosphorescent materials are relatively environmentally friendly and easy to modify.

[0003] Traditional polymer phosphorescent materials carry a large number of aromatic conjugated systems, making them have a sufficient rigid structure, but they have inherent disadvantages such as cumbersome preparation steps, poor biocompatibility, and high toxicity, which to a certain extent limit their applications. In recent years, researchers have found that a class of polymers containing unconventional chromophores also exhibit significant photoluminescence properties in the aggregated state. These non-traditional polymer luminescent materials do not contain traditional conjugated fused-ring chromophores, and only contain unconventional chromophores rich in electron-rich heteroatoms (such as ester groups, amide groups, cyano groups, etc.) to achieve significant luminescence properties through through-space conjugation (TSC). Compared with traditional polymer phosphorescent materials, these non-traditional luminescent materials also have the advantages of easy preparation, stable structure, good hydrophilicity and biocompatibility, and have become ideal candidate materials for flexible electronic devices, biological and medical applications. However, the vast majority of non-traditional polymer room-temperature phosphorescence emissions are concentrated in blue-green to yellow, and it is almost impossible to have a redder emission without heavy metal elements and halogens. In addition, the afterglow color and lifetime regulation of current non-traditional polymer phosphorescent materials are still difficult points. Summary of the Invention

[0004] The purpose of the present invention is to provide a polymer phosphorescent material without traditional aromatic rings, halogens and metal elements and having red room-temperature afterglow emission, and a preparation method thereof, aiming at the disadvantages of difficult preparation of existing non-traditional pure polymer phosphorescent materials and almost impossible red light emission.

[0005] To achieve the above object, the present invention copolymerizes maleimide monomers with vinyl monomers to prepare a branched polymer by a one-step method, and then fully mixes it with polyvinyl alcohol and heats it to obtain an amorphous phosphorescent polymer thin film material. The specific preparation method steps are as follows:

[0006] (1) The maleimide monomers and vinyl monomers undergo a copolymerization reaction under the action of a catalyst or self-catalysis to prepare a branched polymer by a one-step method;

[0007] Among them, the maleimide monomers can be maleimide, N-ethylmaleimide, N-isopropylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, N-benzylmaleimide, N-methylmaleimide, N,N'-m-phenylene bismaleimide, etc.

[0008] Among them, the vinyl monomers can be (meth)acrylate monomers, (meth)acrylamide monomers, propargylate monomers, and allyl monomers, etc.;

[0009] Specifically: acrylamide, N-isopropylmethylacrylamide, N-isopropylacrylamide, N-phenylacrylamide, phenylmethyl methacrylate, phenyl acrylate, phenylmethyl acrylate, dimethylaminopropylacrylamide, tert-butyl methacrylate, etc.;

[0010] The copolymerization reaction adopts solution polymerization; it proceeds rapidly and efficiently within the range of 25°C to 120°C or even larger; the solvent for solution polymerization is any one or a mixture of two of tetrahydrofuran, N,N'-dimethylformamide, diethylene glycol dimethyl ether, or dimethyl sulfoxide. The mass of the solvent used for solution polymerization is 1 to 20 times the mass of the monomers;

[0011] The molar ratio of maleimide monomers to vinyl monomers is 1 to 50:1;

[0012] The catalyst is DBU, TBD, t-BuP1, t-BuP2, t-BuP4, TMA, TEA, TPA, and the molar ratio of vinyl monomer to catalyst is (10 to 500):1;

[0013] (2) The generated branched polymer is fully mixed with polyvinyl alcohol and heated to form an amorphous transparent phosphorescent polymer thin film.

[0014] Among them, the temperature for mixing and heating the branched polymer and polyvinyl alcohol can be 50°C to 200°C, and the mixing and heating time is 0.5h to 10h;

[0015] The mass ratio of the branched polymer to polyvinyl alcohol is (1:1 to 500).

[0016] The structural formula of the polymer phosphorescent material with red room temperature afterglow emission is shown as follows:

[0017]

[0018] Polymer phosphorescent materials are used in the fields of anti-counterfeiting, flexible electronic devices, etc.

[0019] Beneficial effects:

[0020] (1) The raw materials of the present invention are inexpensive and have a wide range of uses. Polymerization is carried out using inexpensive and non-toxic maleimide monomers and common industrial vinyl monomers.

[0021] (2) The polymerization reaction conditions are mild. The reaction temperature range is 25 - 120 °C, and the heating and mixing temperature range is 50 - 200 °C. The catalyst used does not contain metal ions, is easy to remove, and does not affect the properties of the polymer. Some of them can be prepared without adding an external catalyst.

[0022] (3) The polymerization process is simple: using a simple compound as a catalyst, the polymer can be prepared by a one-step method, and the polymer phosphorescent film can be made by simple blending treatment.

[0023] (4) The prepared polymer phosphorescent afterglow color can be adjusted, and the maximum emission wavelength can reach 630 nm, and the afterglow can reach red. And it is itself an amorphous polymer, having good film-forming properties and good application prospects. Description of the drawings

[0024] Figure 1 It is the polymer phosphorescent excitation-emission two-dimensional spectrum diagram of Example 9.

[0025] Figure 2 It is the polymer phosphorescent excitation-emission two-dimensional spectrum diagram of Example 10.

[0026] Figure 3 It is the polymer phosphorescent lifetime diagram of Example 1.

[0027] Figure 4 It is the polymer phosphorescent lifetime diagram of Example 5.

[0028] Figure 5 It is the physical diagram of the polymer afterglow emission of Example 6.

[0029] Figure 6 It is the physical diagram of the polymer afterglow emission of Example 9.

[0030] Figure 7 It is the polymer delayed emission spectrum diagram and chromaticity coordinate diagram of Example 6.

[0031] Figure 8 They are anti-counterfeiting afterglow patterns made of the materials of Example 5, Example 1, and Example 2 respectively. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with embodiments, but is not limited to the following embodiments. For process parameters not specifically noted, conventional techniques can be referred to.

[0033] Example 1

[0034] A dry 100 mL round-bottom flask with a rotor was placed in a glove box filled with an argon atmosphere. 0.5 g (7.034 mmol) of acrylamide, 0.88 g (7.034 mmol) of N-ethylmaleimide, 17.5 μL (0.014 mmol) of t-BuP4 and 27.6 g of tetrahydrofuran were added thereto, and the rubber stopper was covered and taken out, and placed in an oil bath at 25 °C for 6 h. After the reaction was completed, the reaction product was dissolved in tetrahydrofuran and precipitated in 100 mL of n-hexane to obtain a brown product, which was vacuum dried at 30 °C for 1 h. 0.5 g of the product and 0.5 g of polyvinyl alcohol were weighed respectively, added to 5 mL of dimethyl sulfoxide and dissolved thoroughly, and heat treatment was carried out in an oven at 50 °C for 10 h. The obtained product was a brownish-red transparent film, which could emit yellow-green fluorescence when excited at a wavelength of 365 nm, and a yellow afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 9.8%, and the phosphorescence lifetime was 450 ms.

[0035] The red product / brown product / mixture of the red product and polyvinyl alcohol prepared in Example 5, Example 1 or Example 2 was respectively coated or printed on various surfaces (the surfaces can be: glass, various plastics, walls, paper, etc.), and heat treatment was carried out at 100 °C for 1 h to obtain a pattern or mark with afterglow anti-counterfeiting performance.

[0036] Figure 8 From top to bottom, anti-counterfeiting afterglow patterns made of the materials of Example 5, Example 1 and Example 2 were combined for anti-counterfeiting.

[0037] Example 2

[0038] Place a dry 50 mL round-bottom flask equipped with a rotor into a glove box filled with an argon atmosphere. Add 0.05 g (0.629 mmol) of N-isopropylmethacrylamide, 4.4 g (31.450 mmol) of N-isopropylmaleimide, 0.042 g (0.30 mmol) of DBU, and 22.25 g of diethylene glycol dimethyl ether thereto. Cover it with a rubber stopper, take it out, and place it in an oil bath at 50 °C for 6 h. After the reaction is completed, precipitate the product in 100 mL of n-hexane to obtain a red product. Dry it under vacuum at 30 °C for 1 h. Weigh 0.005 g of the product and 2.5 g of polyvinyl alcohol respectively, add them to 10 mL of dimethyl sulfoxide and dissolve them thoroughly. Conduct heat treatment in an oven at 80 °C for 10 h. The obtained product is a colorless transparent film, which can emit blue fluorescence when excited at a wavelength of 365 nm and show blue-green afterglow for several seconds after turning off the excitation light source. The absolute quantum yield is 15.9%, and the phosphorescence lifetime is 241 ms.

[0039] Example 3

[0040] Place a dry 50 mL round-bottom flask equipped with a rotor into a glove box filled with an argon atmosphere. Add 0.5 g (4.419 mmol) of N-isopropylacrylamide, 3.96 g (22.09 mmol) of N-cyclohexylmaleimide, 222.4 μL (0.442 mmol) of t-BuP2, and 8.92 g of N,N'-dimethylformamide thereto. Cover it with a rubber stopper, take it out, and place it in an oil bath at 80 °C for 6 h. After the reaction is completed, precipitate the product in 100 mL of n-hexane to obtain a brown-red product. Dry it under vacuum at 30 °C for 1 h. Weigh 0.025 g of the product and 2.5 g of polyvinyl alcohol respectively, add them to 10 mL of dimethyl sulfoxide and dissolve them thoroughly. Conduct heat treatment in an oven at 100 °C for 10 h. The obtained product is a colorless transparent film, which can emit blue fluorescence when excited at a wavelength of 365 nm and show green afterglow for several seconds after turning off the excitation light source. The absolute quantum yield is 14.1%, and the phosphorescence lifetime is 272 ms.

[0041] Example 4

[0042] A dry 50mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5g (3.39mmol) N-phenylacrylamide, 6.62g (33.9mmol) N-methylacrylamide, 170ul (0.68mmol) t-BuP1 and 21.36g tetrahydrofuran were added thereto, and the rubber stopper was covered and taken out, and the mixture was placed in a 60℃ oil bath pot for reaction for 6h. After the reaction was completed, a red product was precipitated in 100mL n-hexane, and vacuum dried at 30℃ for 1h. 1g of the product and 1g of polyvinyl alcohol were weighed, and fully dissolved in 2mL of dimethyl sulfoxide, and heat-treated in an oven at 120℃ for 6h. The obtained product was a red transparent film, which could emit red fluorescence under 365nm wavelength excitation, and a red afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 2.1%, and the phosphorescence lifetime was 192ms.

[0043] Example 5

[0044] A dry 5mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5g (2.84mmol) benzyl methacrylate, 0.983g (5.68mmol) N-phenylmaleimide, 0.095g (0.68mmol) TBD and 7.415g diethylene glycol dimethyl ether were added thereto, and the rubber stopper was covered and taken out, and placed in a 100℃ oil bath pot for reaction for 6h. After the reaction was completed, a red product was precipitated in 100mL n-hexane, and vacuum dried at 30℃ for 1h. 0.5g of the product and 1g of polyvinyl alcohol were weighed respectively, and fully dissolved in 2mL of dimethyl sulfoxide, and heat-treated in a 140℃ oven for 3h. The obtained product was a red transparent film, which could emit red fluorescence under 365nm wavelength excitation, and a red afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 2.6%, and the phosphorescence lifetime was 217ms.

[0045] Example 6

[0046] A dry 50 mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5 g (3.20 mmol) of dimethylaminopropyl acrylamide, 3.11 g (32.00 mmol) of maleimide, 0.095 g (0.68 mmol) of TPA and 10 g of dimethyl sulfoxide were added thereto. The mixture was taken out after the rubber stopper was covered and placed in an oil bath at 80°C for 6 h. After the reaction was completed, a red product was precipitated in 100 mL of n-hexane and vacuum dried at 30°C for 1 h. 1 g of the product and 1 g of polyvinyl alcohol were weighed and added to 2 mL of dimethyl sulfoxide to fully dissolve. The product was heat treated in an oven at 120°C for 6 h. The product was a red transparent film that could emit red fluorescence under 365 nm wavelength excitation, and a red afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 2.7%, and the phosphorescence lifetime was 195 ms.

[0047] Example 7

[0048] A dry 50 mL round-bottom flask equipped with a rotor was placed in a glove box filled with an argon atmosphere. 0.5 g (3.37 mmol) of phenyl acrylate, 1.26 g (6.75 mmol) of N-benzylmaleimide and 19.9 μL (0.34 mmol) of TMA, and 10 g of tetrahydrofuran were added thereto. After covering with a rubber stopper, it was taken out and placed in an oil bath at 50 °C for 6 h. After the reaction was completed, the product was precipitated in 100 mL of n-hexane to obtain a red product, which was dried in vacuo at 30 °C for 1 h. 0.5 g of the product and 1 g of polyvinyl alcohol were weighed respectively, added to 2 mL of dimethyl sulfoxide and dissolved completely, and then heat-treated in an oven at 160 °C for 6 h. The obtained product was a pink transparent film, which could emit purple-red fluorescence when excited at a wavelength of 365 nm, and showed orange afterglow for several seconds after the excitation light source was turned off. The absolute quantum yield was 4.2%, and the phosphorescence lifetime was 236 ms.

[0049] Example 8

[0050] A dry 50 mL round-bottom flask equipped with a rotor was placed in a glove box filled with an argon atmosphere. 0.5 g (3.52 mmol) of tert-butyl methacrylate, 4.72 g (17.60 mmol) of N-benzylmaleimide and 17.8 μL (0.18 mmol) of TEA, and 10 g of tetrahydrofuran were added thereto. After covering with a rubber stopper, it was taken out and placed in an oil bath at 50 °C for 6 h. After the reaction was completed, the product was precipitated in 100 mL of n-hexane to obtain a red product, which was dried in vacuo at 30 °C for 1 h. 0.5 g of the product and 1 g of polyvinyl alcohol were weighed respectively, added to 2 mL of dimethyl sulfoxide and dissolved completely, and then heat-treated in an oven at 180 °C for 1 h. The obtained product was a pink transparent film, which could emit purple-red fluorescence when excited at a wavelength of 365 nm, and showed orange afterglow for several seconds after the excitation light source was turned off. The absolute quantum yield was 5.1%, and the phosphorescence lifetime was 200 ms.

[0051] Example 9

[0052] A dry 25mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5g (3.08mmol) benzyl acrylate, 2.145g (15.41mmol) N-isopropylmaleimide and 0.028g (0.20mmol) DBU, 10g N, N'-dimethylformamide were added thereto, the rubber stopper was covered and taken out, and placed in a 120℃ oil bath pot for reaction for 6h. After the reaction was completed, a red product was precipitated in 100mL n-hexane, and vacuum dried at 30℃ for 1h. 0.5g of the product and 1g of polyvinyl alcohol were weighed respectively, and fully dissolved in 2mL of dimethyl sulfoxide, and heat-treated in a 200℃ oven for 1h. The obtained product was a pink transparent film, which could emit red fluorescence under 365nm wavelength excitation, and a yellow-red afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 4.2%, and the phosphorescence lifetime was 261ms.

[0053] Example 10

[0054] A dry 50 mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5 g (3.20 mmol) of dimethylaminopropyl acrylamide, 3.11 g (32.00 mmol) of maleimide and 10 g of dimethyl sulfoxide were added thereto, and the mixture was taken out after the rubber stopper was covered, and placed in an oil bath pot at 80°C for 6 hours. After the reaction was completed, a red product was precipitated in 100 mL of n-hexane, and vacuum dried at 30°C for 1 hour. 1 g of the product and 1 g of polyvinyl alcohol were weighed, added to 2 mL of dimethyl sulfoxide and fully dissolved, and heat-treated in an oven at 120°C for 0.5 hours. The obtained product was a red transparent film, which could emit red fluorescence under 365 nm wavelength excitation, and a red afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 2.4%, and the phosphorescence lifetime was 210 ms.

[0055] Embodiment 11

[0056] A dry 50mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5g (3.52mmol) tert-butyl methacrylate, 4.72g (17.60mmol) N-benzylmaleimide and 17.8ul (0.18mmol) TEA, 10g tetrahydrofuran were added thereto, the rubber stopper was covered and taken out, and placed in a 50℃ oil bath pot for reaction for 6h. After the reaction was completed, a red product was precipitated in 100mL n-hexane, and vacuum dried at 30℃ for 1h. 0.5g of the product and 1g of polyvinyl alcohol were weighed respectively, and fully dissolved in 2mL of dimethyl sulfoxide, and heat-treated in an oven at 180℃ for 3h. The obtained product was a pink transparent film, which could emit purple-red fluorescence under 365nm wavelength excitation, and an orange afterglow appeared for several seconds after the excitation light source was turned off. The absolute quantum yield was 5.4%, and the phosphorescence lifetime was 279ms.

[0057] Example 12

[0058] Place a dry 50 mL round-bottom flask equipped with a rotor into a glove box filled with an argon atmosphere. Add 0.5 g (3.52 mmol) of tert-butyl methacrylate, 0.95 g (3.52 mmol) of N-benzylmaleimide, and 17.8 μL (0.18 mmol) of TEA, and 10 g of tetrahydrofuran. Cover with a rubber stopper and take it out, place it in an oil bath at 50 °C, and react for 6 h. After the reaction is completed, precipitate the product in 100 mL of n-hexane to obtain a red product, and dry it under vacuum at 30 °C for 1 h. Weigh 0.5 g of the product and 1 g of polyvinyl alcohol respectively, add them to 2 mL of dimethyl sulfoxide and dissolve them thoroughly, and perform heat treatment in an oven at 180 °C for 3 h. The obtained product is a pink transparent film, which can emit white fluorescence when excited at a wavelength of 365 nm, and shows a yellow afterglow for several seconds after turning off the excitation light source. The absolute quantum yield is 7.6%, and the phosphorescence lifetime is 412 ms.

[0059] Example 13

[0060] Place a dry 50 mL round-bottom flask equipped with a rotor into a glove box filled with an argon atmosphere. Add 0.5 g (3.52 mmol) of tert-butyl methacrylate, 4.72 g (17.60 mmol) of N-benzylmaleimide, and 17.8 μL (0.18 mmol) of TEA, and 10 g of tetrahydrofuran. Cover with a rubber stopper and take it out, place it in an oil bath at 50 °C, and react for 6 h. After the reaction is completed, precipitate the product in 100 mL of n-hexane to obtain a red product, and dry it under vacuum at 30 °C for 1 h. Weigh 0.1 g of the product and 1 g of polyvinyl alcohol respectively, add them to 2 mL of dimethyl sulfoxide and dissolve them thoroughly, and perform heat treatment in an oven at 180 °C for 3 h. The obtained product is a pink transparent film, which can emit purplish-red fluorescence when excited at a wavelength of 365 nm, and shows a yellowish-orange afterglow for several seconds after turning off the excitation light source. The absolute quantum yield is 9.4%, and the phosphorescence lifetime is 206 ms.

[0061] Comparative Example 1

[0062] A dry 100 mL round-bottom flask with a rotor was placed in a glove box filled with argon atmosphere, and 0.5 g (7.034 mmol) acrylamide, 0.88 g (7.034 mmol) N-ethylmaleimide, 0.0436 g (0.18 mmol) BPO and 27.6 g tetrahydrofuran were added thereto, the rubber stopper was covered and taken out, and the mixture was placed in a 70°C oil bath pot for reaction for 6 h. After the reaction was completed, the reaction product was dissolved in tetrahydrofuran, and precipitated in 100 mL n-hexane to obtain a brown product, which was vacuum dried at 30°C for 1 h. 0.5 g of the product and 0.5 g of polyvinyl alcohol were weighed separately, added to 2 mL of dimethyl sulfoxide and fully dissolved, and heat-treated in a 150°C oven for 3 h. The obtained product was a colorless transparent film, which could emit blue fluorescence under 365 nm wavelength excitation, and no afterglow was visible to the naked eye. The absolute quantum yield was 6.9%, and the phosphorescence lifetime was 7.8 us.

[0063] Comparative Example 2

[0064] A 5 mL round-bottom flask with a dry rotor was placed in a glove box filled with argon atmosphere, and 0.5 g (2.84 mmol) of benzyl methacrylate, 0.983 g (5.68 mmol) of N-phenylmaleimide, 0.095 g (0.68 mmol) of TBD and 7.415 g of diethylene glycol dimethyl ether were added thereto, and the rubber stopper was covered and taken out, and the mixture was placed in a 100°C oil bath pot for reaction for 6 hours. After the reaction was completed, a red product was precipitated in 100 mL of n-hexane, and vacuum dried at 30°C for 1 hour to obtain a red powder, which was fully dissolved in 2 mL of dimethyl sulfoxide and heat-treated in a 140°C oven for 3 hours. The obtained product was still a red powder, and the red powder emitted red fluorescence under excitation at a wavelength of 365 nm, and there was no visible afterglow. The absolute quantum yield was 2.6%, and the phosphorescence lifetime was 10.4 us.

Claims

1. A preparation method of a polymeric phosphorescent material with red room-temperature afterglow emission, characterized in that, The preparation method is as follows: (1) An anionic copolymerization reaction occurs between maleimide monomers and vinyl monomers under the action of a catalyst or autocatalysis to prepare a branched polymer; The maleimide monomers are: maleimide, and the vinyl monomers are: dimethylaminopropyl acrylamide; The molar ratio of maleimide monomers to vinyl monomers is 10:1; (2) The generated branched polymer is fully mixed with polyvinyl alcohol and heated to form an amorphous transparent phosphorescent polymer film; The mass ratio of the branched polymer to polyvinyl alcohol is 1:

1.

2. The preparation method of the polymeric phosphorescent material with red room-temperature afterglow emission according to claim 1, wherein, In step (1), the copolymerization reaction is carried out by solution polymerization at a temperature higher than 25 °C; the solvent for solution polymerization is any one or a mixture of two of tetrahydrofuran, N,N'-dimethylformamide, diethylene glycol dimethyl ether, or dimethyl sulfoxide, and the mass of the solvent used is 1 to 20 times the mass of the monomers.

3. The preparation method of the polymeric phosphorescent material with red room-temperature afterglow emission according to claim 1, characterized in that, In step (1), the catalyst is DBU, TBD, t-BuP1, t-BuP2, t-BuP4, TMA, TEA, TPA; the molar ratio of vinyl monomers to the catalyst is 10 to 500:

1.

4. The preparation method of the polymer phosphorescent material with red room-temperature afterglow emission according to claim 1, characterized in that In step (2), the mixing and heating temperature of the branched polymer and polyvinyl alcohol is 50 °C - 200 °C, and the mixing and heating time is 0.5 h to 10 h.

5. A polymer phosphorescent material with red room-temperature afterglow emission prepared by the method according to claim 1.

6. Use of a polymeric phosphorescent material having red room-temperature afterglow emission prepared by the method according to claim 1, characterized in that, The polymer phosphorescent material is used in the fields of anti-counterfeiting and flexible electronic devices.

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