Photoelectric response type organic-inorganic hybrid complex as well as preparation method and application thereof
By preparing photoelectric responsive organic-inorganic hybrid complexes and using specific ligands to form a three-dimensional framework structure, the problem of slow response rate of photochromic materials was solved, and rapid photoresponse characteristics were achieved, making them suitable for a variety of application scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN UNIVERSITY
- Filing Date
- 2026-01-28
- Publication Date
- 2026-05-12
AI Technical Summary
Existing photochromic materials have a single stimulus response and a slow response rate, making it difficult to meet the needs of multiple applications.
A photoelectric responsive organic-inorganic hybrid complex was used, with 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine as the main ligand and 2,5-thiophene dicarboxylic acid as the auxiliary ligand. A three-dimensional framework structure was formed by a solvothermal method, and the complex rapidly changed color under ultraviolet light irradiation.
It achieves a rapid light response characteristic, changing from yellow to green within 1 second under ultraviolet light, making it suitable for inkless printing, electrochromic devices, photochromic decorations, optical memory, optical switches, and optoelectronic displays.
Smart Images
Figure CN122011406A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of optoelectronic functional materials technology, and relates to an optoelectronic responsive organic-inorganic hybrid complex, its preparation method and application. Background Technology
[0002] Photochromic compounds are a class of smart materials that undergo reversible changes in color or optical properties under illumination of specific wavelengths of light. These changes are typically driven by light-induced alterations in molecular structure or electronic states. When the light source is removed or the illumination conditions are changed, the material returns to its original state. Due to their rapid response and high fatigue resistance, these materials show great potential in cutting-edge technology fields such as the automotive industry, molecular switches, X-ray detection, and bioimaging.
[0003] Electrochromic compounds are optically variable compounds that exhibit reversible changes in transmittance or reflectance when an external voltage is applied. Due to their unique adjustable optical properties, electrochromic devices have attracted widespread attention in fields such as smart windows, sensing, and displays.
[0004] In recent years, many novel photochromic materials have emerged, especially viologen composites that respond to stimuli. These materials not only possess the photochromic properties of viologen compounds themselves, but also achieve precise control of stimulus response and performance optimization through combination with other materials, thus demonstrating broad application prospects in multiple fields. However, due to the relatively late start of development in this type of material, current research on photochromic materials still faces challenges such as single stimulus response, limited application modes, and slow response rates. This makes it difficult to achieve multifunctional responses from a single material and simultaneously meet multiple application requirements. Summary of the Invention
[0005] This invention addresses the technical problems of photochromic materials having a single stimulus response and slow response rate by providing a photoelectric responsive organic-inorganic hybrid complex that can change from yellow to green within 1 second of ultraviolet light exposure, exhibiting rapid photoresponse characteristics and having broad application prospects.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] In a first aspect, the present invention provides a photoelectric responsive organic-inorganic hybrid complex 1, wherein the chemical formula of the complex 1 is C 30 H 36 ClEuN2O 17S, belonging to the orthorhombic crystal system, space group Pbca, has unit cell parameters of a=14.0395(12) Å, b=17.8197(10) Å, c=29.7330(13) Å, α=90°, β=90°, γ=90°. Its asymmetric unit contains one main ligand 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, one auxiliary ligand 2,5-thiophene dicarboxylic acid, three coordinated water molecules, one free chloride ion, and six free water molecules. Each Eu 3+ It coordinates with two oxygen atoms from two different main ligands, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, three oxygen atoms from two auxiliary ligands, 2,5-thiophene dicarboxylic acid, and three oxygen atoms from three water molecules to form an octahedral dodecahedron; its three-dimensional structure is constructed as follows: metal Eu 3+ It forms a one-dimensional chain structure by alternating links with adjacent 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine and 2,5-thiophene dicarboxylic acid, respectively. Then, adjacent one-dimensional chain structures are linked by another molecule of 2,5-thiophene dicarboxylic acid to form a two-dimensional network structure. Finally, adjacent two-dimensional network structures are linked by 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine to form a three-dimensional porous framework structure. Chloride ions are linked to the three-dimensional porous framework structure through hydrogen bonds.
[0008] In the above technical solution, the complex 1 undergoes a color change from yellow to green within 1 second under 365 nm ultraviolet light excitation.
[0009] In the above technical solution, the complex 1 exhibits bright orange-red fluorescence when placed in the dark after being excited by 365 nm ultraviolet light, and the fluorescence brightness decreases but does not quench as the ultraviolet light excitation time increases.
[0010] This invention provides another photoelectric responsive organic-inorganic hybrid complex 2, the chemical formula of which is C. 30 H 36 ClDyN2O 17 S, belonging to the orthorhombic crystal system, space group Pbca, has unit cell parameters a=13.5832(6)Å, b=17.7071(6)Å, c=29.7043(11)Å, α=90°, β=90°, γ=90°. Its asymmetric unit contains one main ligand 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, one auxiliary ligand 2,5-thiophene dicarboxylic acid, three coordinated water molecules, one free chloride ion, and six free water molecules. Each Dy 3+It coordinates with two oxygen atoms from two different main ligands, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, three oxygen atoms from two auxiliary ligands, and three oxygen atoms from three water molecules to form an octahedral dodecahedron; its three-dimensional structure construction process is as follows: Metal Dy 3+ It forms a one-dimensional chain structure by alternating links with adjacent 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine and 2,5-thiophene dicarboxylic acid, respectively. Then, adjacent one-dimensional chain structures are linked by another molecule of 2,5-thiophene dicarboxylic acid to form a two-dimensional network structure. Finally, adjacent two-dimensional network structures are linked by 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine to form a three-dimensional porous framework structure. Chloride ions are linked to the three-dimensional porous framework structure through hydrogen bonds.
[0011] In the above technical solution, the complex 2 undergoes a color change from yellow to green within 1 second under 365 nm ultraviolet light excitation.
[0012] In the above technical solution, the magnetism of the complex 2 is weakened after treatment with 365 nm ultraviolet light.
[0013] Secondly, the present invention provides a method for preparing the above-mentioned photoelectric responsive organic-inorganic hybrid complex, comprising the following steps: mixing a metal salt, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, 2,5-thiophene dicarboxylic acid, water, N,N'-dimethylacetamide, acetonitrile, and dilute hydrochloric acid evenly, and reacting the mixture to obtain yellow rhombic crystals.
[0014] In the above technical solution, the metal salt is a europium salt or a dysprosium salt, where the europium salt is europium nitrate hexahydrate and the dysprosium salt is dysprosium nitrate hexahydrate. When the metal salt is a europium salt, complex 1 is obtained; when the metal salt is a dysprosium salt, complex 2 is obtained.
[0015] In the above technical solution, the mass ratio of the metal salt, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, and 2,5-thiophene dicarboxylic acid is 7:3:2.
[0016] In the above technical solution, the volume ratio of water, N,N′-dimethylacetamide, acetonitrile, and dilute hydrochloric acid is 10:10:40:1.
[0017] In the above technical solution, the reaction temperature is 120 ℃ and the reaction time is 24 to 72 h.
[0018] Thirdly, the present invention provides the application of the above-mentioned photoelectric responsive organic-inorganic hybrid complex in photo / electrochromic products.
[0019] In the above technical solution, the photo / electrochromic products include inkless printing equipment, electrochromic devices, photochromic decorative items, optical storage devices, optical switches, optoelectronic display devices, and photochromic information anti-counterfeiting devices.
[0020] Fourthly, this invention provides the application of the above-mentioned photo-responsive organic-inorganic hybrid complex in ultraviolet detection products. For example, when an ultraviolet detection strip made of photo-responsive complex 1 is exposed to natural light, the surface color of the material can change from yellow (initial state) to green (excited state) within 30 seconds, and can exhibit different degrees of color depending on the intensity of ultraviolet radiation in nature, demonstrating high sensitivity and fast response photosensitive characteristics.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0022] This invention uses photoactive 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine as the main ligand and electron-rich 2,5-thiophene dicarboxylic acid as the auxiliary ligand. Under solvothermal conditions, it coordinates with Eu(NO3)3 or Dy(NO3)3 to form a three-dimensional framework organic-inorganic hybrid complex. This complex exhibits photo / electrochromic properties, changing from yellow to green within 1 second of ultraviolet light irradiation, demonstrating rapid photoresponse characteristics. This makes it promising for applications in inkless printing, electrochromic devices, photochromic decoration, optical memory, optical switches, and optoelectronic displays.
[0023] The ultraviolet detection strip made using the complex 1 of this invention can change its surface color from yellow (initial state) to green (excited state) within 30 seconds when exposed to natural light. It can exhibit different degrees of color depending on the intensity of ultraviolet radiation in nature, demonstrating high sensitivity and fast response photosensitive characteristics. Attached Figure Description
[0024] Figure 1 The crystal structure diagrams of coordination compound 1 and coordination compound 2 of the present invention are shown, wherein Figure 1 a represents the asymmetric unit of coordination compound 1 and coordination compound 2, where Figure 1 b represents a one-dimensional chain structure formed by coordination compound 1 and coordination compound 2; Figure 1 c represents bcbp and the metal Eu. 3+ Two-dimensional network structure formed by coordination; Figure 1 d represents the formed three-dimensional framework structure; the spheres in the figure indicate that complex 1 and complex 2 have large cavities.
[0025] Figure 2 This is a thermogravimetric analysis diagram of complex 1 and complex 2 of the present invention.
[0026] Figure 3Crystal photochromic images of complex 1 (a) and complex 2 (b) of the present invention as a function of time.
[0027] Figure 4 Infrared spectra of complex 1 (a) and complex 2 (b) of the present invention before and after illumination.
[0028] Figure 5 These are powder diffraction patterns of complex 1 (a) and complex 2 (b) of the present invention before and after illumination.
[0029] Figure 6 These are the light-time dependent solid-state diffuse reflectance spectra of complex 1 (a) and complex 2 (b) of the present invention.
[0030] Figure 7 These are the EPR of complexes 1(a) and 2(b) before and after light exposure.
[0031] Figure 8 The light-time dependent solid-state emission spectrum of complex 1 of this invention is (Ex: 395 nm).
[0032] Figure 9 This is a diagram showing the magnetic properties of the complex 2 of this invention before and after light exposure.
[0033] Figure 10 Cyclic voltammetry curves and electrochromic images of complex 1 (a) and complex 2 (b) of the present invention.
[0034] Figure 11 Solid-state diffuse reflectance spectra of complex 1 (a) and complex 2 (b) of the present invention as a function of voltage.
[0035] Figure 12 These are comparison images of the powder color changes of complex 1 and complex 2 of the present invention under white light (a) and ultraviolet light (b, c).
[0036] Figure 13 These are color-changing photographs of the complex 1 of the present invention after being exposed to light for 30 seconds at different times. Detailed Implementation
[0037] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of protection of the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art. Unless otherwise specified, the test methods in the following embodiments are conventional methods.
[0038] Example 1
[0039] 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine (bcbp, 15 mg), 2,5-thiophene dicarboxylic acid (TDC, 10 mg), europium nitrate hexahydrate (35 mg), distilled water (1 mL), N,N′-dimethylacetamide (DMA, 1 mL), acetonitrile (4 mL), and HCl (100 μL, 3.00 mol / L) were added sequentially to a glass bottle, mixed thoroughly, and sealed. The mixture was then reacted in an oven at 120 °C for 36 h. After the reaction was complete, the glass bottle was gradually cooled to room temperature and removed. The crystals formed inside the glass bottle were removed, yielding yellow rhombic crystals, which were designated as complex 1.
[0040] Example 2
[0041] 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine (bcbp, 15 mg), 2,5-thiophene dicarboxylic acid (TDC, 10 mg), dysprosium nitrate hexahydrate (35 mg), H2O (1 mL), DMA (1 mL), CH3CN (4 mL), and HCl (100 μL, 3.00 mol / L) were added sequentially to a glass bottle, mixed thoroughly, and sealed. The mixture was then reacted in an oven at 120 °C for 36 h. After the reaction was complete, the glass bottle was gradually cooled to room temperature and removed. The crystals formed inside the glass bottle were removed, yielding yellow rhomboid crystals, which were designated as complex 2.
[0042] (1) Elemental analysis (calculated values, %): Complex 1: C 39.33, H 3.96, N 3.06; Complex 2: C 38.89, H 3.92, N 3.02.
[0043] Elemental analysis (experimental values, %): Complex 1: C 39.32, H 3.93, N 3.06; Complex 2: C 38.88, H 3.89, N 3.02.
[0044] (2) Crystal structure characterization: Single crystals of appropriate size were selected and X-ray diffraction analysis was performed on a Bruker D8 Venture_Air diffractometer at a test temperature of 298.15 K. MoKα rays (λ = 0.71073 Å) were used to collect crystal diffraction point data, and the data were reduced and corrected for absorption using the direct method. The structure was analyzed and refined using the SHELXT and SHELXL procedures. The coordinates of non-hydrogen atoms in the structure were corrected for anisotropic temperature factors using the full matrix least squares method, and the coordinates of hydrogen atoms were obtained using the difference Fourier synthesis method. The crystallographic data of complex 1 and complex 2 are shown in Table 1.
[0045] Table 1. Crystallographic data of coordination compound 1 and coordination compound 2
[0046]
[0047] X-ray single-crystal diffraction results show that:
[0048] The chemical formula of complex 1 is C 30 H 36 ClEuN2O 17 S belongs to the orthorhombic crystal system, space group Pbca, with unit cell parameters a=14.0395(12)Å, b=17.8197(10)Å, c=29.7330(13)Å, α=90°, β=90°, γ=90°. Its asymmetric unit contains a main ligand 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine (bcbp), an auxiliary ligand 2,5-thiophene dicarboxylic acid, three coordinated water molecules, one free chloride ion, and six free water molecules ( Figure 1 a). Each Eu 3+ It coordinates with two oxygen atoms from two different main ligands (bcbp), three oxygen atoms from two auxiliary ligands, and three oxygen atoms from three water molecules to form an octahedral dodecahedron. Its three-dimensional structure is constructed as follows: Metal Eu 3+ It forms a one-dimensional chain structure by alternating links with adjacent bcbp and 2,5-thiophene dicarboxylic acid. Figure 1 b), and then adjacent one-dimensional chain structures are connected by another molecule of 2,5-thiophene dicarboxylic acid to form a two-dimensional network structure. Figure 1 c), finally, adjacent two-dimensional network structures are connected by bcbp to form a three-dimensional porous framework structure, and chloride ions are connected to the three-dimensional porous framework structure through hydrogen bonds. Figure 1 d).
[0049] The chemical formula of complex 2 is C 30 H 36 ClDyN2O 17 S belongs to the orthorhombic crystal system, space group Pbca, with unit cell parameters a=13.5832(6)Å, b=17.7071(6)Å, c=29.7043(11)Å, α=90°, β=90°, γ=90°. Its asymmetric unit contains a main ligand 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine (bcbp), an auxiliary ligand 2,5-thiophene dicarboxylic acid, three coordinated water molecules, one free chloride ion, and six free water molecules ( Figure 1 a). Each Dy 3+ It coordinates with two oxygen atoms from two different main ligands (bcbp), three oxygen atoms from two auxiliary ligands, and three oxygen atoms from three water molecules to form an octahedral dodecahedron. Its three-dimensional structure is constructed as follows: Metal Dy 3+It forms a one-dimensional chain structure by alternating links with adjacent bcbp and 2,5-thiophene dicarboxylic acid. Figure 1 b), and then adjacent one-dimensional chain structures are connected by another molecule of 2,5-thiophene dicarboxylic acid to form a two-dimensional network structure. Figure 1 c), finally, adjacent two-dimensional network structures are connected by bcbp to form a three-dimensional porous framework structure, and chloride ions are connected to the three-dimensional porous framework structure through hydrogen bonds. Figure 1 d).
[0050] (3) Thermogravimetric analysis: From Figure 2 It can be seen that complex 1 and complex 2 can be stable up to 340 ℃. Before 340 ℃, the water that is physically adsorbed is released, indicating that both complex 1 and complex 2 have good thermal stability.
[0051] Example 3: Photochromic Experiment
[0052] Using a 365 nm ultraviolet lamp as the light source, the bulk crystals of complex 1 and complex 2 prepared in Examples 1 and 2 were placed under a microscope to observe the color changes.
[0053] like Figure 3 As shown, at room temperature, after 1 second of irradiation, the crystal color of both complexes changed from yellow to green. After a cumulative irradiation of 60 seconds, the crystal color turned dark green and basically reached saturation. The color change comparison diagram under ultraviolet light shows that both complex 1 and complex 2 exhibit rapid photoresponse characteristics.
[0054] from Figure 4 The infrared spectra show that after 3 minutes of ultraviolet irradiation, the infrared spectra of complex 1 and complex 2 before and after irradiation have similar peak positions, indicating that the structure of the crystal did not change before and after irradiation.
[0055] from Figure 5 The powder diffraction patterns show that after 3 minutes of ultraviolet light irradiation, the powder diffraction patterns of complex 1 and complex 2 before and after irradiation have similar peak positions, indicating that the crystal structure did not change before and after irradiation.
[0056] from Figure 6 The time-dependent solid-state diffuse reflectance spectra show that complexes 1 and 2 exhibit a shoulder band around 450 nm. After UV irradiation, new absorption peaks appear near 670 nm and 740 nm, and their intensity gradually increases with irradiation time, eventually saturating after 60 s of irradiation. This is due to the π-π* and n-π* transitions of the conjugated ligand bcbp and the Eu... 3+ Charge transfer between ions and bcbp ligands.
[0057] from Figure 7 EPR analysis showed that before illumination, neither complex 1 nor complex 2 had any free radical signal. However, after 3 min of UV illumination, the sample showed a clear singlet free radical signal peak near g=2.000, indicating the generation of viologen free radicals.
[0058] Complex 1 was tested before and after UV light treatment using a 395 nm light source for excitation. Figure 8 The time-dependent solid-state diffuse reflectance spectrum shows that the fluorescence intensity of complex 1 decreased stepwise after irradiation for different times, with the fluorescence intensity after 60 s irradiation being 36.48% of that before irradiation. The quantum yield of complex 1 before and after irradiation was 15.93% and 0.57%, respectively, indicating that its quantum yield decreased significantly after ultraviolet light treatment.
[0059] The magnetic properties of complex 2 before and after ultraviolet irradiation were analyzed, such as... Figure 9 As shown, the magnetism of complex 2 changed significantly before and after illumination; the magnetism of complex 2 weakened by 5.19% after illumination compared to before illumination.
[0060] Example 4 Electrochromic Experiment
[0061] 10 mg of complex 1 and complex 2 prepared in Examples 1 and 2 were respectively added to a mixed solution of 0.2 mL PMMA solution and 0.2 mL anhydrous ethanol. The mixture was sonicated for 30 min until the compounds were evenly dispersed in the solution. The solution was then encapsulated into an electrochromic device (the electrochromic device consists of two ITO conductive glass plates, and the solution was coated between the two ITO conductive glass plates to obtain the electrochromic device). After the electrochromic device was energized at a certain voltage (0~-0.6 V), the color change was observed.
[0062] like Figure 10 As shown, the electrochromic devices prepared by both complexes changed from yellow to green. Furthermore, the cyclic voltammetry curves of complex 1 and complex 2 showed two redox peaks at -0.57 V and -0.89 V, and -0.27 V and -0.66 V, respectively. Figure 11 The solid-state diffuse reflectance spectrum shows that the intensity of the absorption peaks of both complex 1 and complex 2 gradually increases with increasing voltage.
[0063] Example 5: Information Anti-counterfeiting Application
[0064] Complex 1 and Complex 2 prepared in Examples 1 and 2 were ground into powder and made into snowflake patterns. The left half of the snowflake was Complex 1 and the right half was Complex 2.
[0065] After shining a white flashlight on the created pattern (as shown) Figure 12 a) Both compounds can change from yellow to green after 5 seconds of irradiation, and the powder color reaches a dark green after 90 seconds of irradiation, essentially reaching saturation.
[0066] The pattern was illuminated with 365 nm ultraviolet light and then placed in natural light. Figure 12 b) and under dark conditions ( Figure 12 (c) Under natural light, the two crystalline powders change from yellow to green after only 1 second of irradiation, and reach a deep green color after 60 seconds, essentially reaching saturation. Under dark conditions, the pattern on the right (complex 2) shows no fluorescence, while only the pattern on the left (complex 1) exhibits fluorescence. The fluorescence intensity decreases with increasing UV irradiation time but does not completely extinguish with prolonged light exposure. Based on the phenomenon that the two complexes exhibit different information under the same conditions in different environments, this can be applied to information anti-counterfeiting devices.
[0067] Example 6 Ultraviolet Detection
[0068] After mixing 25 mg of complex 1 prepared in Example 1 with 2 mL of ethanol, the mixture was repeatedly and evenly coated onto strips of filter paper and allowed to air dry to obtain the ultraviolet detection strip. The prepared detection strip was exposed to different time periods (e.g., 00:00, 08:00, 10:00, 12:00, 14:00, 16:00, 18:00) and allowed to stand for 30 seconds. The sample then changed from yellow to emerald green or dark green, exhibiting high sensitivity and rapid response characteristics (e.g., ...). Figure 13 ).
[0069] The embodiments described above are merely preferred embodiments of the present invention and are only used to explain the present invention. They are not intended to limit the scope of the present invention. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made on the principle of the present invention should be included within the scope of the patent application of the present invention.
Claims
1. A photoelectric responsive organic-inorganic hybrid complex, characterized in that, The chemical formula of the complex is C. 30 H 36 ClEuN2O 17 S, belonging to the orthorhombic crystal system, space group Pbca, has unit cell parameters of a=14.0395(12) Å, b=17.8197(10) Å, c=29.7330(13) Å, α=90°, β=90°, γ=90°. Its asymmetric unit contains one main ligand 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, one auxiliary ligand 2,5-thiophene dicarboxylic acid, three coordinated water molecules, one free chloride ion, and six free water molecules. Each Eu 3+ It coordinates with two oxygen atoms from two different main ligands, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, three oxygen atoms from two auxiliary ligands, 2,5-thiophene dicarboxylic acid, and three oxygen atoms from three water molecules to form an octahedral dodecahedron; its three-dimensional structure is constructed as follows: metal Eu 3+ It forms a one-dimensional chain structure by alternating links with adjacent 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine and 2,5-thiophene dicarboxylic acid, respectively. Then, adjacent one-dimensional chain structures are linked by another molecule of 2,5-thiophene dicarboxylic acid to form a two-dimensional network structure. Finally, adjacent two-dimensional network structures are linked by 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine to form a three-dimensional porous framework structure. Chloride ions are linked to the three-dimensional porous framework structure through hydrogen bonds.
2. The photoelectric responsive organic-inorganic hybrid complex according to claim 1, characterized in that, When the complex is excited by 365 nm ultraviolet light, the crystal color changes from yellow to green within 1 second.
3. The photoelectric responsive organic-inorganic hybrid complex according to claim 1, characterized in that, The complex exhibits bright orange-red fluorescence when excited by 365 nm ultraviolet light and placed in the dark. The fluorescence intensity decreases with increasing ultraviolet light excitation time but does not quench.
4. The method for preparing the photoelectric responsive organic-inorganic hybrid complex according to any one of claims 1 to 3, characterized in that, Includes the following steps: Europium salt, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, 2,5-thiophene dicarboxylic acid, water, N,N'-dimethylacetamide, acetonitrile, and dilute hydrochloric acid were mixed evenly and reacted to obtain yellow rhombic crystals.
5. The method for preparing the photoelectric responsive organic-inorganic hybrid complex according to claim 4, characterized in that, The europium salt is europium nitrate hexahydrate.
6. The method for preparing the photoelectric responsive organic-inorganic hybrid complex according to claim 4, characterized in that, The mass ratio of europium salt, 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridine, and 2,5-thiophene dicarboxylic acid is 7:3:
2.
7. The method for preparing the photoelectric responsive organic-inorganic hybrid complex according to claim 4, characterized in that, The volume ratio of water, N,N′-dimethylacetamide, acetonitrile, and dilute hydrochloric acid is 10:10:40:
1.
8. The method for preparing the photoelectric responsive organic-inorganic hybrid complex according to claim 4, characterized in that, The reaction temperature is 120 °C, and the reaction time is 24–72 h.
9. The application of the photoelectric responsive organic-inorganic hybrid complexes described in any one of claims 1 to 3 in photo / electrochromic products.
10. The application of the photoelectric responsive organic-inorganic hybrid complex as described in any one of claims 1 to 3 in ultraviolet detection products.