Electron donor-acceptor polymer and its preparation method and application

Abstract

This invention discloses an electron donor-acceptor polymer, its preparation method, and its applications, relating to the field of photocatalysis technology. The polymer uses ethyl or sulfone groups as side chains to modify a benzene ring as an electron donor and anthraquinone as an electron acceptor, with an alkynyl group acting as an electron bridge connecting the electron donor and acceptor units. The resulting polymer improves the stability of photocatalytic hydrogen peroxide production by reducing the generation of superoxide radicals and increasing the formation of oxygen-centered organic radicals.

Description

Technical Field

[0001] This invention relates to the field of photocatalysis technology, and more specifically, to an electron donor-acceptor polymer, its preparation method, and its application. Background Technology

[0002] Hydrogen peroxide is one of the world's 100 most important chemicals, with wide applications in medicine, disinfection, wastewater treatment, and chemical synthesis. Photocatalytic synthesis of hydrogen peroxide utilizes sustainably available water and oxygen on Earth, offering advantages such as low energy consumption, simple equipment, and non-toxicity, making it an ideal choice for hydrogen peroxide synthesis. Currently, the main photocatalysts for hydrogen peroxide synthesis are organic photocatalysts because they exhibit better performance compared to inorganic catalysts. Furthermore, organic catalysts can be modified at the molecular level, allowing for precise control of the photophysical and photochemical processes in the photocatalytic synthesis of hydrogen peroxide. Although organic photocatalysts demonstrate high performance in hydrogen peroxide synthesis, their stability is often unsatisfactory. This serious problem severely restricts the practical application of organic photocatalysts in the photocatalytic synthesis of hydrogen peroxide.

[0003] D-π-A type conjugated polymer photocatalysts are photocatalytic materials composed of alternating electron donors (D), electron bridges (π), and electron acceptors (A). In recent years, the application of D-π-A type conjugated polymer photocatalytic generation of hydrogen peroxide has become a focus of numerous scientific research projects.

[0004] Prior art CN116178678 A discloses a bridged electron donor-acceptor polymer, its preparation method, and its application. This bridged electron donor-acceptor polymer uses an alkyne group as an electron bridge to connect the electron donor and electron acceptor units. The electron donor unit is tetraphenylethylene, 2,4,6-triphenyltriazine, or benzo[a]carbazole, and the electron acceptor unit is anthraquinone or sulfoxide. By introducing an alkyne group as an electron bridge, recombination of photogenerated carriers is reduced, making the bridged electron donor-acceptor polymer suitable for photocatalytic hydrogen peroxide production. However, this prior art polymer exhibits poor stability as an organic photocatalyst, only being reused three times in photocatalytic hydrogen peroxide production before its performance significantly declines. Summary of the Invention

[0005] The primary objective of this invention is to overcome the problem of poor stability of existing bridged electron donor-acceptor polymers when used as photocatalysts for the photocatalytic synthesis of hydrogen peroxide, and to provide a new electron donor-acceptor polymer.

[0006] A further object of the present invention is to provide a method for preparing an electron donor-acceptor polymer.

[0007] Another object of the present invention is to provide the application of the above-mentioned electron donor-acceptor polymer in photocatalytic hydrogen peroxide production.

[0008] Another object of the present invention is to provide a method for photocatalytic production of hydrogen peroxide.

[0009] The above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0010] An electron donor-acceptor polymer having the structure shown in formula (I):

[0011]

[0012] in, For electron donor units; It is an electron acceptor unit; For electronic bridge;

[0013] The electron donor unit is of formula (a-1) or (a-2):

[0014]

[0015] The electron acceptor unit is of formula (b):

[0016]

[0017] The electronic bridge is

[0018] p represents the site connected to the electron acceptor unit, m represents the site connected to the electron donor unit, and J and K represent the sites connected to the electron bridge.

[0019] The electron donor-acceptor polymer of the present invention is a D-π-A type conjugated polymer with alternating electron donor and acceptor linkages. The electron donor unit is an ethyl or sulfone group modified benzene ring as a side chain, and the electron acceptor unit is anthraquinone.

[0020] Preferably, the electron donor-acceptor polymer has the structure shown in formula (II):

[0021]

[0022] Preferably, the electron donor-acceptor polymer has the structure shown in formula (III):

[0023]

[0024] This invention also protects a method for preparing an electron donor-acceptor polymer with the structure shown in formula (II) above, comprising the following steps: mixing an electron donor 3,5-dibromoethylbenzene with... It is obtained through a polymerization reaction.

[0025] Preferably, the method for preparing the electron donor-acceptor polymer with the structure shown in formula (II) above may include the following steps: mixing the electron donor 3,5-dibromoethylbenzene, It is obtained by reaction in the presence of palladium catalyst, cuprous iodide and base.

[0026] In one specific embodiment, the palladium catalyst may be tetra(triphenylphosphine)palladium and / or bis(triphenylphosphine)palladium chloride.

[0027] In one specific embodiment, the alkali is one or more of triethylamine, sodium carbonate, and potassium carbonate.

[0028] In one specific implementation method, the reaction temperature is 70–90°C and the reaction time is 24–48 hours.

[0029] In one specific implementation, the reaction atmosphere is an inert atmosphere. Specifically, the reaction atmosphere is a nitrogen atmosphere and / or an argon atmosphere.

[0030] In one specific embodiment, the reaction is carried out in an organic solvent, which is one or more of dimethylacetamide, N-methylpyrrolidone, and dimethylformamide.

[0031] After the reaction, post-processing operations may also be included, which in turn include drying, grinding, ultrasonic dispersion, filtration and secondary drying steps.

[0032] This invention also protects a method for preparing the electron donor-acceptor polymer shown in formula (III) above, comprising the following steps: […]. It is obtained by polymerization of electron acceptor 2,6-dibromoanthraquinone.

[0033] Preferably, the method for preparing the electron donor-acceptor polymer shown in formula (III) above may include the following steps: ... It is given by reacting with electron acceptor 2,6-dibromoanthracene in the presence of palladium catalyst, cuprous iodide and base.

[0034] In one specific embodiment, the palladium catalyst may be tetra(triphenylphosphine)palladium and / or bis(triphenylphosphine)palladium chloride.

[0035] In one specific embodiment, the alkali is one or more of triethylamine, sodium carbonate, and potassium carbonate.

[0036] In one specific implementation method, the reaction temperature is 70–90°C and the reaction time is 24–48 hours.

[0037] In one specific implementation, the reaction atmosphere is an inert atmosphere. Specifically, the reaction atmosphere is a nitrogen atmosphere and / or an argon atmosphere.

[0038] In one specific embodiment, the reaction is carried out in an organic solvent, which is one or more of dimethylacetamide, N-methylpyrrolidone, and dimethylformamide.

[0039] After the reaction, post-processing operations may also be included, which in turn include drying, grinding, ultrasonic dispersion, filtration and secondary drying steps.

[0040] Preferably, Depend on It is obtained by reacting with tetrabutylammonium fluoride.

[0041] In one specific implementation, the reaction is carried out in an organic solvent, namely tetrahydrofuran.

[0042] In one specific implementation method, the reaction temperature is 0–25°C and the reaction time is 0.5–1 hour.

[0043] Preferably, Depend on It is obtained by reacting with triisopropylsilylacetylene.

[0044] The preparation method may include the following steps: It is obtained by reacting triisopropylsilylacetylene with a palladium catalyst, cuprous iodide and a base.

[0045] In one specific embodiment, the palladium catalyst may be tetra(triphenylphosphine)palladium and / or bis(triphenylphosphine)palladium chloride.

[0046] In one specific implementation method, the reaction temperature is 70–90°C and the reaction time is 24–48 hours.

[0047] In one specific implementation, the reaction atmosphere is an inert atmosphere. Specifically, the reaction atmosphere is a nitrogen atmosphere and / or an argon atmosphere.

[0048] In one specific implementation, the reaction is carried out in an organic solvent, namely piperidine. Piperidine is basic.

[0049] This invention also protects the application of the electron donor-acceptor polymer described above in photocatalytic hydrogen peroxide production.

[0050] The electron donor and acceptor polymer of the present invention, after the electron bridge and electron acceptor receive electrons, can serve as active sites for oxygen reduction, and can selectively reduce oxygen to hydrogen peroxide.

[0051] This invention also protects the application of the electron donor-acceptor polymer described above in the photocatalytic production of hydrogen peroxide to reduce the generation of superoxide radicals.

[0052] The inventors unexpectedly discovered that in photocatalytic hydrogen peroxide production, the electron donor-acceptor polymer of this invention, by modifying specific electron donors, can promote the generation of oxygen-centered organic radicals (OCORs) while reducing superoxide radicals (·O2). - The generation of ) thereby improves the cycle stability of the resulting polymer for photocatalytic hydrogen peroxide production.

[0053] Preferably, in photocatalytic hydrogen peroxide production, the structure shown in formula (II) exhibits superior cycle stability. This is because the electron donor-acceptor polymer of the structure shown in formula (II) can reduce the generation of most superoxide radicals, effectively preventing superoxide radicals from attacking the catalyst itself, thereby improving cycle stability.

[0054] This invention also protects a method for photocatalytic hydrogen peroxide production, comprising the following steps: adding the electron donor-acceptor polymer described in any of the above claims to water, with a light intensity of 100 mW / cm². 2 This produces hydrogen peroxide.

[0055] Compared with the prior art, the beneficial effects of the present invention are:

[0056] This invention provides a novel electron donor-acceptor polymer, which is a D-π-A type conjugated polymer. An alkynyl group acts as an electron bridge connecting the electron donor and acceptor units. The electron donor unit is a benzene ring modified with an ethyl or sulfone group as a side chain, and the electron acceptor unit is anthraquinone. By modifying a specific electron donor, this electron donor-acceptor polymer promotes the generation of oxygen-centered organic radicals while reducing the generation of superoxide radicals, thereby improving the cycle stability of the resulting polymer for photocatalytic hydrogen peroxide production.

[0057] When the electron donor-acceptor polymer of the present invention is used as a photocatalyst for the preparation of hydrogen peroxide, it can be reused 10 to 20 times in the photocatalytic production of hydrogen peroxide without significant performance degradation. Attached Figure Description

[0058] Figure 1 The nuclear magnetic resonance (NMR) of the electron donor-acceptor polymer in Example 1 is shown. 13 C-NMR spectrum.

[0059] Figure 2 The nuclear magnetic resonance (NMR) of compound 1 in the preparation method of the electron donor-acceptor polymer in Example 2 is shown. 13 C-NMR spectrum.

[0060] Figure 3 The nuclear magnetic resonance (NMR) of compound 2 in the preparation method of the electron donor-acceptor polymer in Example 2 is shown. 13 C-NMR spectrum.

[0061] Figure 4It is the nuclear magnetic resonance (NMR) of the electron donor-acceptor polymer in Example 2. 13 C-NMR spectrum.

[0062] Figure 5 These are diffuse reflectance infrared spectra of the electron donor-acceptor polymer of Example 1, the electron donor-acceptor polymer of Example 2, and the anthraquinone monomer.

[0063] Figure 6 These are the Raman spectra of the electron donor and acceptor polymers of Example 1 and Example 2.

[0064] Figure 7 These are XRD patterns of the electron donor-acceptor polymers of Example 1 and Example 2.

[0065] Figure 8 Characterization diagrams of oxygen-centered organic free radicals in the electron donor and acceptor polymers of Examples 1 and 2.

[0066] In the figure: Ethyl-AQ is the electron donor-acceptor polymer of Example 1.

[0067] Sulfonly-AQ is the electron donor-acceptor polymer of Example 2.

[0068] AQ is 2,6-diethynylanthracene-9,10-dione. Detailed Implementation

[0069] The present invention will be further described in detail below with reference to specific embodiments. These embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention. Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods; the materials and reagents used are commercially available unless otherwise specified.

[0070] Example 1

[0071] The preparation method of the electron donor-acceptor polymer is as follows:

[0072]

[0073] The preparation method includes the following steps:

[0074] Under an argon atmosphere, 35 mg of 3,5-dibromoethylbenzene and 50 mg of 2,6-diethynylanthracene-9,10-dione (AQ) were added to 50 mL of DMF. Bis(triphenylphosphine)palladium chloride (13 mg), CuI (3.71 mg), and triethylamine (50 mL) were added to the solution. The reaction mixture was stirred at 80 °C for 48 hours. After cooling, the mixture was sonicated in DMF for 30 minutes, then centrifuged, ultrasonically washed three times with ethanol, filtered, and vacuum dried at 60 °C to obtain the electron donor-acceptor polymer, denoted as Ethyl-AQ. See NMR spectroscopy for details. Figure 1 .

[0075] A method for photocatalytic hydrogen peroxide production includes the following steps: adding 1 mg of the above-mentioned electron donor-acceptor polymer to 50 mL of pure water, ultrasonically dispersing for 30 min, stirring, and irradiating with a xenon lamp with a light intensity controlled at 100 mW / cm². 2 .

[0076] Example 2

[0077] The preparation method of the electron donor-acceptor polymer is as follows:

[0078]

[0079] Synthetic route of compound 1:

[0080] 1,3-Dibromo-5-((methanesulfonyl)methyl)benzene (1.058 g, 3.2 mmol), triisopropylsilylacetylene (1.411 g, 8.1 mmol), bis(triphenylphosphine)palladium dichloride (22 mg, 0.3 mmol), and cuprous iodide (61 mg, 0.32 mmol) were dissolved in piperidine (100 mL). The solution was heated to 70 °C and held for 24 h under argon protection. After cooling to room temperature, the solution was evaporated to dryness and purified by dichloromethane column chromatography to give 1.54 g of a pale yellow solid, with a yield of 95%. ¹H NMR (400MHz, DMSO-d⁶) δ 7.55 (d, J = 4Hz, 2H), 7.50 (t, J = 4Hz, 1H), 4.56 (s, 2H), 2.95 (s, 3H), 1.10 (42H). ¹³C NMR (101MHz, DMSO-d⁶) δ 134.98, 134.41, 131.13, 123.52, 105.77, 92.08, 58.42, 18.95, 11.13. See NMR for details. Figure 2 .

[0081] Synthetic route of compound 2:

[0082] Compound 1 (2.09 g, 4 mmol) was dissolved in tetrahydrofuran (50 ml), and tetrabutylammonium fluoride (5.14 g, 19.6 mmol) was added dropwise in an ice bath. The reaction was carried out for half an hour, dried by rotary evaporation, and precipitated by dichloromethane column chromatography to give 0.85 g of a yellow solid, with a yield of 93%. 1 H NMR (400MHz, DMSO-d6) δ7.58 (t, J = 4Hz, 1H), 7.55 (d, J = 4Hz, 2H), 4.53 (s, 2H), 4.35 (s, 2H), 2.93 (s, 3H). 13 C NMR (101MHz, DMSO-d6) δ 134.95, 134.75, 131.11, 123.00, 82.70, 82.35, 55.65. See NMR for details. Figure 3 .

[0083] The preparation of electron donor-acceptor polymers follows the reaction formula below:

[0084]

[0085] Compound 2 (64 mg) and 2,6-dibromoanthraquinone (50 mg) were dissolved in 50 mL of dimethylformamide (DMF) under an argon atmosphere. Bis(triphenylphosphine)palladium chloride (13 mg), cuprous iodide (3.71 mg), and triethylamine (50 mL) were added to the solution. The reaction mixture was stirred at 80 °C for 48 hours. After cooling, the mixture was sonicated in DMF for 30 minutes, then centrifuged, sonicated three times with ethanol, filtered, and vacuum dried at 60 °C to obtain the electron donor-acceptor polymer, designated Sulfonyl-AQ. See NMR spectroscopy for details. Figure 4 .

[0086] A method for photocatalytic hydrogen peroxide production includes the following steps: adding 1 mg of the above-mentioned electron donor-acceptor polymer to 50 mL of pure water, ultrasonically dispersing for 30 min, stirring, and irradiating with a xenon lamp with the light intensity controlled at 100 mW / cm². 2 .

[0087] Comparative Example 1

[0088] An electron donor-acceptor polymer has the following structural formula:

[0089]

[0090] Add 1 mg of the above-mentioned electron acceptor polymer to 50 mL of pure water, sonicate for 30 min, stir, and irradiate with a xenon lamp with a light intensity controlled at 100 mW / cm². 2 .

[0091] Performance testing

[0092] The electron donor-acceptor polymer of Example 1, Compound 1, Compound 2, and the electron donor-acceptor polymer of Example 2 were tested using solid-state nuclear magnetic resonance spectroscopy. The electron donor-acceptor polymers of Example 1 and Example 2 were tested using infrared spectroscopy, Raman spectroscopy, and X-ray powder diffraction, respectively. The test results are as follows:

[0093] Figure 1 The nuclear magnetic resonance (NMR) of the electron donor-acceptor polymer in Example 1 is shown. 13 C-NMR spectrum.

[0094] Figure 2 The nuclear magnetic resonance (NMR) of compound 1 in the preparation method of the electron donor-acceptor polymer in Example 2 is shown. 13 C-NMR spectrum.

[0095] Figure 3 The nuclear magnetic resonance (NMR) of compound 2 in the preparation method of the electron donor-acceptor polymer in Example 2 is shown. 13 C-NMR spectrum.

[0096] Figure 4 It is the nuclear magnetic resonance (NMR) of the electron donor-acceptor polymer in Example 2. 13 C-NMR spectrum.

[0097] Figure 5 These are diffuse reflectance infrared (FT-IR) spectra of the electron donor-acceptor polymer of Example 1, the electron donor-acceptor polymer of Example 2, and the anthraquinone monomer.

[0098] Figure 6 These are the Raman spectra of the electron donor and acceptor polymers of Example 1 and Example 2.

[0099] Figure 7 These are XRD patterns of the electron donor-acceptor polymers of Example 1 and Example 2.

[0100] from Figure 1 and Figure 4 As can be seen from this, in solid state 13 C nuclear magnetic resonance (C 13 In the C-NMR spectrum, chemical shifts of different carbon environments were detected. Specifically, a significant signal at approximately 180 ppm indicates a ketone carbon, a signal in the range of 120–140 ppm indicates the presence of aromatic carbons, and a signal at approximately 90 ppm indicates an alkyne carbon. Furthermore, for the electron donor-acceptor polymer of Example 2, signals of approximately 59 ppm and 40 ppm were attributed to -CH2 and -CH3, respectively. In the electron donor-acceptor polymer of Example 1, the signal peaks of -CH2 and -CH3 appeared at approximately 28 ppm and 15 ppm, respectively.

[0101] The characteristic signals of the alkynyl groups in the electron donor-acceptor polymers of Example 1 and Example 2 were obtained from solid-state... 13 C nuclear magnetic resonance (C 13 The spectroscopy was determined by C-NMR, FT-IR, and Raman spectra. Specifically, 13 The signal of 90.88 ppm by C-NMR ( Figure 1 , Figure 4 The FT-IR spectrum is approximately 2210 cm⁻¹. -1 place ( Figure 5 ) and Raman spectrum at 2200cm -1 ( Figure 6 ).

[0102] also, 13 The carbon signal peak of the ketone in the C NMR spectrum (≈180ppm) Figure 1 , Figure 4 ), FT-IR spectrum at ~1670 cm⁻¹ -1 The stretching signal peak at C=O ( Figure 5 Example 2: FTIR spectrum of the electron donor-acceptor polymer (Sulfonyl-AQ) at 1120 cm⁻¹ -1 A signal was detected at this location, which was attributed to the stretching vibration peak of the sulfone (O=S=O) group. Figure 5 This confirms that the O=S=O unit was successfully introduced into the polymer. Figure 5 ).

[0103] Figure 5 Anthraquinone monomers in approximately 3260 cm -1 A tensile vibration peak of acetylene hydrogen was observed. Its disappearance in the polymer indicates that the acetylene was successfully coupled with both the electron donor and acceptor.

[0104] Powder X-ray diffraction (PXRD) patterns showed that all the photocatalysts exhibited characteristics of amorphous carbon.

[0105] The successful polymerization of the two polymers in Examples 1 and 2 was confirmed by the above analytical methods.

[0106] (2) Photocatalytic cycle stability test: 30 mg of the electron donor-acceptor polymers of Examples 1, 2, and Comparative Example 1 were added to 50 mL of pure water, ultrasonically dispersed for 30 min, stirred, and irradiated with a xenon lamp for 1 hour, with the light intensity controlled at 100 mW / cm². 2The first cycle was performed, followed by filtration and drying. Then, 1 mg of the electron donor and acceptor polymers from Examples 1, 2, and 1 (Comparative Example 1) were weighed and added to 50 mL of pure water. The mixture was ultrasonically dispersed for 30 min, stirred, and irradiated with a xenon lamp for 1 hour to test its performance, thus performing the second cycle. This process was repeated until the alkynyl peak disappeared from the FT-IR spectrum, indicating significant catalyst degradation. More cycles resulted in better cycle stability.

[0107] The number of hydrogen peroxide cycles is shown in Table 1.

[0108] Table 1. Number of cycles for hydrogen peroxide production by the catalyst (times)

[0109]

[0110]

[0111] As shown in Table 1, the electron donor-acceptor polymer in Example 1, which contains ethyl groups as side groups and benzene rings as electron donors, can cycle up to 20 times under pure water, open-air conditions without sacrificial agents and under simulated sunlight, exhibiting excellent cycling stability.

[0112] In Example 2, the electron donor-acceptor polymer modified with sulfone groups as side chains and benzene rings as electron donors can also achieve 10 cycles under the same conditions.

[0113] The electron donor-acceptor polymer in Comparative Example 1 only required 3 cycles under the same conditions.

[0114] (3) Superoxide radicals (·O2) generated by the electron donor-acceptor polymers in Examples 1 and 2 of the present invention during photocatalytic hydrogen peroxide production - The quantitative values ​​(μmol / L) of ) are shown in Table 2 below.

[0115] time 4min 8min 12min 16min Example 1 3.04 14.86 20.99 26.65 Example 2 31.33 59.44 70.90 87.75

[0116] Figure 8 Characterization diagrams of oxygen-centered organic radicals generated by the electron donor-acceptor polymers in Examples 1 and 2 during photocatalytic hydrogen peroxide production. The oxygen-centered organic radicals were measured using electron paramagnetic resonance (EPR) (Bruker A300 spectrometer).

[0117] From Table 2 and Figure 8As can be seen, the electron donor-acceptor polymer (Ethyl-AQ) of Example 1, which uses ethyl as a side chain to modify the benzene ring as an electron donor, significantly increases the amount of oxygen-centered organic radicals and greatly reduces the amount of superoxide radicals in the photocatalytic production of hydrogen peroxide compared to the electron donor-acceptor polymer (Sulfonyl-AQ) of Example 2, which uses sulfone as a side chain to modify the benzene ring as an electron donor. This indicates that the electron donor-acceptor polymer of Example 1 avoids the attack of superoxide radicals on itself, increases the pathway for oxygen-centered organic radicals to generate hydrogen peroxide from oxygen, and thus increases the stability of photocatalytic hydrogen peroxide production.

[0118] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electron donor-acceptor polymer, characterized in that, It has the structure shown in equation (I): in, For electron donor units; It is an electron acceptor unit; For electronic bridge; The electron donor unit is of formula (a-1) or (a-2): The electron acceptor unit is of formula (b): The electronic bridge is p represents the site connected to the electron acceptor unit, m represents the site connected to the electron donor unit, and J and K represent the sites connected to the electron bridge.

2. The electron donor-acceptor polymer as described in claim 1, characterized in that, It has the structure shown in equation (II):

3. The electron donor-acceptor polymer as described in claim 1, characterized in that, It has the structure shown in equation (III):

4. The method for preparing the electron donor-acceptor polymer according to claim 2, characterized in that, The steps include: using electron donor 3,5-dibromoethylbenzene and It is obtained through a polymerization reaction.

5. The method for preparing the electron donor-acceptor polymer according to claim 3, characterized in that, Includes the following steps: It is obtained by polymerization of electron acceptor 2,6-dibromoanthraquinone.

6. The method for preparing the electron donor-acceptor polymer as described in claim 5, characterized in that, Depend on It is obtained by reacting with tetrabutylammonium fluoride.

7. The method for preparing the electron donor-acceptor polymer as described in claim 6, characterized in that, Depend on It is obtained by reacting with triisopropylsilylacetylene.

8. The use of the electron donor-acceptor polymer of claim 1 in photocatalytic hydrogen peroxide production.

9. The application of the electron donor-acceptor polymer of claim 1 in the photocatalytic production of hydrogen peroxide to reduce the generation of superoxide radicals.

10. A method for photocatalytic production of hydrogen peroxide, characterized in that, The process includes the following steps: adding the electron donor-acceptor polymer of claim 1 to water, with a light intensity of 100 mW / cm². 2 This produces hydrogen peroxide.

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