Light-activated chiral zinc complex material with adjustable circular polarization afterglow as well as preparation method and application of light-activated chiral zinc complex material

Abstract

The invention discloses a light-activated chiral zinc complex material with adjustable circular polarization afterglow as well as a preparation method and application of the light-activated chiral zinc complex material, and belongs to the field of circular polarization afterglow materials. The chiral zinc complex material is obtained by self-assembling zinc iodide and an S-(-)-1, 1 '-binaphthyl-2, 2'-diphenylphosphine ligand at room temperature and adopting an interface diffusion method, the molecular formula of the chiral zinc complex material is S-Zn (BINAP) I2, rapid and simple mass synthesis is achieved, the chiral zinc complex material has good solubility and stability, technical support is provided for further application of the material, and the chiral zinc complex material is suitable for industrial production. And a foundation is provided for subsequently preparing a thin film material. According to the prepared polymethyl methacrylate film doped with the chiral zinc complex material and the polymethyl methacrylate film doped with the chiral zinc complex material and rubrene, the film material shows multicolor circular polarization afterglow after being irradiated by ultraviolet light, and the film material has the advantages that the film material can be used for preparing the polymethyl methacrylate film doped with the chiral zinc complex material and the rubrene; the method has important application value in the security fields of dynamic multiple anti-counterfeiting, advanced information encryption and the like.

Description

Technical Field

[0001] This invention relates to the field of luminescent materials technology, specifically to the field of light-activated circularly polarized afterglow materials technology, particularly to the field of dynamic multi-layer anti-counterfeiting and advanced information encryption application technology, and especially to a chiral zinc complex material with light-activated tunable circularly polarized afterglow, its preparation method and application. Background Technology

[0002] Anti-counterfeiting technology is of great significance for maintaining modern economic order, protecting intellectual property rights, and combating counterfeit and shoddy products. With the continuous advancement of counterfeiting techniques, the demand for anti-counterfeiting materials has expanded from initial visual identification to multiple, difficult-to-replicate properties. Traditional anti-counterfeiting methods such as single-band fluorescent materials and physical watermarks, due to their single information carrier and susceptibility to counterfeiting, are no longer sufficient to meet the security requirements of high-end products, securities, and important documents. To improve the reliability of anti-counterfeiting, scientists have proposed a new method using long-afterglow luminescent materials. This material continues to emit light after excitation, possesses time-resolved capabilities, and can be detected in dark environments, achieving a preliminary dual anti-counterfeiting effect. However, the afterglow signals of most long-afterglow materials (represented by sulfides) still have static characteristics, and most are unpolarized, making them easy to replicate. The application of circularly polarized luminescent materials in the field of chiral optics is a novel anti-counterfeiting technology. Circularly polarized light, due to its left-handed and right-handed properties, requires special optical devices for detection, posing significant challenges to simulation.

[0003] Utilizing the characteristics of long afterglow and circularly polarized emission, a novel optical signal combining ultra-long lifetime and chiral features has been developed, considered an important research direction for the development of next-generation anti-counterfeiting technologies. Currently, circularly polarized afterglow is obtained by introducing chiral phosphorescent molecules into rigid matrices and synthesizing chiral coordination polymers. However, this research direction still faces some key bottlenecks that need to be overcome: First, the efficient control and conversion of signals by nanomaterials. Most reported circularly polarized afterglow materials are in a constant-brightness or single-excitation state; however, research on these materials is still limited. Furthermore, the synthesized chiral phosphorescent signal changes and cannot be triggered on demand or repeatedly erased and rewritten. This characteristic restricts its application in information encryption, dynamic display, and other high-level security applications. An ideal cryptographic material should be able to respond to external stimuli, thereby achieving the purpose of hiding and revealing. Light, as a stimulus with high spatial and temporal resolution and simple controllability, can effectively solve this problem. Developing materials with circularly polarized afterglow allows for the complete embedding of encrypted information within the material. These materials only require specific stimuli to be excited, thus exhibiting circularly polarized afterglow and significantly enhancing the concealment and confidentiality of the information. Secondly, the optical properties of these materials lack synergy. The emission color, afterglow time, and asymmetry factor of circularly polarized emission are key factors affecting the amount of anti-counterfeiting encoded information. However, in current material systems, these parameters are typically fixed step-by-step, making it difficult to continuously control them over a large range and with high precision on a single material platform. This rigidity hinders personalized design for different application scenarios, thus limiting their universality. Therefore, designing a synergistic system that allows for simple control of these properties through molecular design or external environmental factors is crucial for constructing a high-throughput anti-counterfeiting system with large-scale coding combinations. Thirdly, it involves survivability and cost in practical applications. Currently, many high-performance circularly polarized afterglow materials are composed of precious metals such as iridium and platinum or rare earth elements, which are expensive and scarce, limiting their large-scale application. Therefore, constructing efficient circularly polarized afterglow materials using inexpensive and readily available zinc ions is a very meaningful endeavor. Currently, there is an urgent need in this field for a novel circularly polarized afterglow material that combines the advantages of dynamic control of photoactivation, synergistic design of multi-dimensional optical properties, and low-cost, rapid, and mass production. The goal of this invention is to design a novel method that can control the activation and reproduction of codes under simple ultraviolet light stimulation, while providing a completely new and powerful solution for generating numerous unique anti-counterfeiting codes, overcoming the shortcomings of the aforementioned prior art. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a chiral zinc complex material with photoactivated tunable circularly polarized afterglow, its preparation method, and its applications.

[0005] The objective of this invention is achieved through the following technical solution: Firstly, this invention provides a chiral zinc complex material with light-activated tunable circularly polarized afterglow. The zinc complex material is orthorhombic with chiral space group P212121; Flack value is 0.006(2); cell parameters are a=12.0870(7) Å, b=17.0220(9) Å, c=18.4957(10) Å, α=90°, β=90°, γ=90°, V=3805.4(4), Z=4, Dc=1.644 g / cm³. 3 The zinc complex material is a cubic crystal, and its crystal color is colorless; the zinc complex material is electrically neutral in structure; the molecular formula of the zinc complex material is S-Zn(BINAP)I2, wherein S-BINAP is S-(-)-1,1'-binaphthyl-2,2'-diphenylphosphine; the molecular structural formula of the zinc complex material is shown below: Wherein, Zn is a zinc atom, P is a phosphorus atom, I is an iodine atom, and Ph2 is a diphenyl atom; the zinc (Zn) atom adopts a twisted tetrahedral geometry, and the zinc atom is coordinated with two iodine (I) atoms and also with two phosphorus (P) atoms of S-BINAP.

[0006] Secondly, the present invention also provides a method for preparing the above-mentioned chiral zinc complex material into a single nucleus, comprising the following steps: (1) Dissolve 0.1 mmol of zinc iodide (ZnI2) in tetrahydrofuran at room temperature; (2) Dissolve 0.1 mmol S-BINA in dichloromethane at room temperature; (3) Mix the two solutions obtained in step (1) and step (2) to obtain a clear yellow solution. Stir the solution at room temperature to make it evenly mixed. (4) The uniformly mixed clear yellow solution obtained in step (3) is rotary evaporated on a rotary evaporator to obtain a yellow powder; (5) Add 3 mL of dichloromethane to the yellow powder obtained by rotary evaporation and transfer it to a test tube. Then add 6 mL of petroleum ether and diffuse for 2 days to obtain colorless block crystals.

[0007] The aforementioned colorless blocky crystals are mononuclear zinc complex materials, obtained by the coordination reaction of zinc iodide with S-BINAP ligands, with the molecular formula S-Zn(BINAP)I2. Under ambient light, the crystals of the zinc complex material are colorless, but under a 365nm ultraviolet lamp, the zinc complex material emits green light.

[0008] Thirdly, the present invention also provides a rapid and large-scale synthesis method for the above-mentioned chiral zinc complex material, comprising the following steps: (1) Dissolve 0.1 mmol of zinc iodide (ZnI2) in tetrahydrofuran at room temperature; (2) Dissolve 0.1 mmol S-BINA in dichloromethane at room temperature; (3) Mix the two solutions obtained in step (1) and step (2) to obtain a clear yellow solution. Stir the solution at room temperature to make it evenly mixed. (4) The uniformly mixed yellow clear solution obtained in step (3) is rotary evaporated on a rotary evaporator to obtain yellow powder.

[0009] The yellow powder mentioned above is a zinc complex material, which is obtained by the coordination reaction between zinc iodide and S-BINAP ligand, followed by rotary evaporation. X-ray powder diffraction (XRD) confirmed that its material structure is S-Zn(BINAP)I2.

[0010] Fourthly, the present invention also provides a method for preparing a polymethyl methacrylate (PMMA) film doped with the above-mentioned chiral zinc complex material, comprising the following steps: (1) Weigh 0.004 g of zinc complex material S-Zn(BINAP)I2 crystals or powder and 0.0096 g of PMMA at room temperature and dissolve them together in 1 mL of dichloromethane. Stir until completely dissolved to obtain a colorless and clear solution. (2) At room temperature, the completely dissolved colorless and clear solution is dropped onto a quartz plate and dried to obtain a thin film.

[0011] Fifthly, the present invention also provides a method for preparing a polymethyl methacrylate film doped with the above-mentioned chiral zinc complex material and rubene, comprising the following steps: (1) Weigh 0.004 g of zinc complex material S-Zn(BINAP)I2 crystals or powder, 0.0096 g of PMMA and 0.001 g of Rub at room temperature and dissolve them together in 1 mL of dichloromethane. Stir until completely dissolved to obtain a clear orange solution. (2) At room temperature, drop the completely dissolved orange clear solution onto a quartz plate and dry it to obtain a film.

[0012] Sixthly, the present invention also provides an application of the above-mentioned chiral zinc complex material in dynamic multi-layer anti-counterfeiting and advanced information encryption.

[0013] The aforementioned PMMA films doped with chiral zinc complexes, and PMMA films doped with chiral zinc complexes and rubber, exhibit properties such as multicolor circularly polarized afterglow, making them suitable for use as multi-layered anti-counterfeiting materials. Specifically, the PMMA film doped with chiral zinc complexes achieves amplified circularly polarized luminescence and a green afterglow lasting up to 2.2 seconds; the PMMA film doped with chiral zinc complexes and rubber achieves multicolor circularly polarized afterglow. Ultimately, these film materials can demonstrate significant application value in security fields such as dynamic multi-layered anti-counterfeiting and advanced information encryption.

[0014] The beneficial effects of this invention are: (1) This invention prepares a mononuclear zinc complex material by self-assembling S-(-)-1,1'-binaphthyl-2,2'-diphenylphosphine (S-BINAP) with zinc iodide and using an interfacial diffusion method, and provides a rapid and large-scale synthesis method for the zinc complex material; PMMA films doped with zinc complex material and PMMA films doped with zinc complex material and Rub are prepared. The film material realizes multicolor circular polarization afterglow, which has important applications in the fields of dynamic multi-layer anti-counterfeiting and advanced information encryption.

[0015] (2) The zinc complex material S-Zn(BINAP)I2 provided by the present invention has the advantages of easy and rapid large-scale synthesis, as well as good solubility and stability, which provides technical support for the further application of the material and also provides a foundation for the subsequent preparation of thin film materials.

[0016] (3) After preparing PMMA films doped with zinc complex materials and PMMA films doped with zinc complex materials and Rub, the present invention achieves photoactivated multicolor circular polarization afterglow by ultraviolet light irradiation, which shows important application value in security fields such as dynamic multi-anti-counterfeiting and advanced information encryption. Attached Figure Description

[0017] Figure 1 This is a single-crystal structure diagram of the complex molecule S-Zn(BINAP)I2; Figure 2 This is a packing diagram of the complex molecule S-Zn(BINAP)I2; Figure 3 The X-ray powder diffraction patterns of the complex molecules S-Zn(BINAP)I2 crystals and powders are shown. Figure 4 The optimal emission spectrum and time-resolved lifetime decay curves of PMMA thin films doped with the complex S-Zn(BINAP)I2 are shown; among them, Figure 4(a) shows the optimal emission spectrum of a PMMA thin film doped with the complex S-Zn(BINAP)I2 (excitation wavelength 365 nm). Figure 4 (b) in the figure is the time-resolved lifetime decay curve of the PMMA film doped with complex S-Zn(BINAP)I2 before ultraviolet light irradiation. Figure 4 (c) in the figure is the time-resolved lifetime decay curve of the PMMA film doped with the complex S-Zn(BINAP)I2 after ultraviolet light irradiation. Figure 5 The optimal emission spectrum and time-resolved lifetime decay curves before and after ultraviolet light irradiation are shown for PMMA thin films doped with complexes S-Zn(BINAP)I2 and Rub; among them, Figure 5 (a) shows the optimal emission spectrum (excitation wavelength 365 nm) of a PMMA thin film doped with complexes S-Zn(BINAP)I2 and Rub. Figure 5 (b) shows the time-resolved lifetime decay curve of the PMMA film doped with complexes S-Zn(BINAP)I2 and Rub before ultraviolet light irradiation. Figure 5 (c) in the figure is the time-resolved lifetime decay curve of the PMMA film doped with complexes S-Zn(BINAP)I2 and Rub after ultraviolet light irradiation. Figure 6 These are afterglow photographs of PMMA films doped with the complex S-Zn(BINAP)I2 and PMMA films doped with the complexes S-Zn(BINAP)I2 and Rub. Figure 7 The circularly polarized emission spectra of PMMA films doped with the complex S-Zn(BINAP)I2 and PMMA films doped with both the complexes S-Zn(BINAP)I2 and Rub are shown; among them, Figure 7 (a) in the figure is the circularly polarized emission spectrum of a PMMA thin film doped with the complex S-Zn(BINAP)I2; Figure 7 (b) in the figure is the circularly polarized emission spectrum of a PMMA thin film doped with complexes S-Zn(BINAP)I2 and Rub; Figure 8 This is an asymmetry factor diagram of a PMMA film doped with the complex S-Zn(BINAP)I2, and a PMMA film doped with both the complexes S-Zn(BINAP)I2 and Rub; among them, Figure 8 (a) in the figure is the asymmetry factor diagram of a PMMA film doped with the complex S-Zn(BINAP)I2; Figure 8 (b) in the figure is the asymmetry factor diagram of a PMMA film doped with complexes S-Zn(BINAP)I2 and Rub; Figure 9This is a schematic diagram of the application of PMMA thin films doped with zinc complex material S-Zn(BINAP)I2 and PMMA thin films doped with zinc complex materials S-Zn(BINAP)I2 and Rub. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0019] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0021] The present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0022] Example 1: Preparation of mononuclear zinc complex materials ZnI₂ (0.32 g, 0.1 mmol) was dissolved in tetrahydrofuran (3 mL), and S-BINAP (0.065 g, 0.1 mmol) was dissolved in dichloromethane (3 mL). The two solutions were mixed. The solvent in the mixed solution was evaporated to dryness using a rotary evaporator (this method allows for simple, rapid, and large-scale preparation). 3 mL of dichloromethane was added and transferred to a test tube. 6 mL of petroleum ether was carefully added to the top of the solution. After diffusion at room temperature for 2 days, S-1 was obtained at the solution interface, with a yield of 68% (based on Zn). X-ray single-crystal structure analysis of the single crystal revealed that the zinc complex material has a mononuclear structure. Figure 1 As shown, its unit cell packing structure diagram is as follows: Figure 2 As shown.

[0023] Example 2: Rapid and large-scale synthesis of zinc complex materials 0.1 mmol ZnI2 was dissolved in tetrahydrofuran at room temperature, and 0.1 mmol S-BINAP was dissolved in dichloromethane at room temperature. The two solutions were mixed to obtain a clear yellow solution. The mixture was stirred at room temperature to make it homogeneous. The resulting homogeneous clear yellow solution was then rotary evaporated to obtain a yellow powder. Figure 3 The X-ray powder diffraction patterns of the zinc complex material S-Zn(BINAP)I2 crystals and powders are shown. Figure 3 It can be seen that the X-ray powder diffraction (XRD) pattern of the yellow powder matches the simulated XRD pattern of the crystal structure of the zinc complex material, confirming that the powder is indeed the zinc complex material.

[0024] Example 3: Preparation of PMMA thin films doped with zinc complex materials 0.004 g of zinc complex S-Zn(BINAP)I2 powder and 0.0095 g of PMMA were weighed and dissolved in 1 mL of dichloromethane at room temperature. The solution was stirred until completely dissolved, yielding a colorless and clear solution. The completely dissolved colorless and clear solution was then drop-coated onto a quartz plate at room temperature and dried to obtain a thin film. Subsequently, the photoactivated circularly polarized luminescence (CPL) and long afterglow properties were investigated. After ultraviolet (UV) irradiation, the results were as follows: Figure 4 As shown, by Figure 4 As shown in the optimal emission spectrum (a), the PMMA film doped with the zinc complex S-Zn(BINAP)I2 exhibits green luminescence. Figure 4 (b) and Figure 4 As shown in (c), the time-resolved lifetime decay curves of the PMMA film doped with the S-Zn(BINAP)I2 complex before and after UV irradiation show that the phosphorescence lifetime of the PMMA film doped with the S-Zn(BINAP)I2 complex increased from 277.52 ms before UV irradiation to 368.22 ms after UV irradiation, and there was still a continuous green emission for 2.2 s after the UV lamp was turned off. Figure 6 As shown. Its circular polarization spectrum was obtained by measuring with a circular polarization spectrometer, as shown. Figure 7 As shown in (a), there is a distinct emission peak in the 450-700 nm range, which corresponds perfectly to the emission peak, and its asymmetry factor is 2.7 × 10⁻⁶. -3 ,like Figure 8 As shown in (a) of the diagram.

[0025] Example 4: Preparation of PMMA thin films doped with zinc complex materials and Rub 0.004 g of zinc complex S-Zn(BINAP)I2 powder, 0.0095 g of PMMA, and 0.001 g of Rub were weighed and dissolved in 1 mL of dichloromethane at room temperature. The solution was stirred until completely dissolved, yielding a clear orange solution. The dissolved orange solution was then drop-coated onto a quartz plate at room temperature and dried to obtain a thin film. The photoactivated circularly polarized luminescence and long afterglow properties were subsequently investigated. After ultraviolet irradiation, the results were as follows: Figure 5 As shown, by Figure 5 As shown in the optimal emission spectrum (a), the PMMA film doped with complexes S-Zn(BINAP)I2 and Rub exhibits yellow luminescence. Figure 5 (b) and Figure 5 As shown in (c), the time-resolved lifetime decay curves of the PMMA film doped with the S-Zn(BINAP)I2 complex before and after UV irradiation show that the phosphorescence lifetime of the PMMA film doped with the S-Zn(BINAP)I2 complex increased from 16.01 ms before UV irradiation to 162.51 ms after UV irradiation, and there was still a continuous yellow emission for 1.4 s after the UV lamp was turned off. Figure 6 As shown. Its circular polarization spectrum was obtained by measuring with a circular polarization spectrometer, as shown. Figure 7 As shown in (b), there is a distinct emission peak in the 450-700 nm range, which corresponds perfectly to the emission peak, and its asymmetry factor is 1.6 × 10⁻⁶. -3 ,like Figure 8 As shown in (b) of the diagram.

[0026] Example 5: Application of zinc complex materials in dynamic multi-layer anti-counterfeiting and advanced information encryption The prepared PMMA films doped with zinc complex materials, Rub films, PMMA films doped with both zinc complex materials and Rub, and blank quartz sheets were arranged in an 8×4 module, as follows: Figure 9As shown, the information can be converted into digital information based on ASCII code or binary code (only yellow and green can output 1, the rest directly output 0). Under sunlight, the PMMA film doped with zinc complex material and the blank quartz plate are colorless, while the PMMA film doped with zinc complex material and Rub emits orange light, all outputting 0, and no valid information can be read. Under 365nm UV irradiation, the PMMA film doped with zinc complex material emits green light, while the Rub film and the PMMA film doped with zinc complex material and Rub emit yellow light. Yellow and green light output 1, the rest output 0, indicating an incorrect password. 0.1s after the UV light is turned off, green and yellow afterglow appear, which can be converted into the valid information "ZLGU" according to ASCII code. After 1.5s, only the green afterglow of the zinc complex material remains, which can be converted into the valid information "2025" according to binary code, realizing the application of dynamic multi-layer anti-counterfeiting and advanced information encryption.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chiral zinc complex material with light-activated tunable circularly polarized afterglow, characterized in that, The zinc complex material is orthorhombic with chiral space group P212121; Flack value is 0.006(2); cell parameters are a=12.0870(7) Å, b=17.0220(9) Å, c=18.4957(10) Å, α=90°, β=90°, γ=90°, V=3805.4(4), Z=4, Dc=1.644 g / cm³. 3 The zinc complex material is a cubic crystal, and its crystal color is colorless; the molecular formula of the zinc complex material is S-Zn(BINAP)I2, wherein S-BINAP is S-(-)-1,1'-binaphthyl-2,2'-diphenylphosphine; the molecular structural formula of the zinc complex material is shown below: Wherein, Zn is a zinc atom, P is a phosphorus atom, I is an iodine atom, and Ph2 is a diphenyl atom; the zinc atom adopts a twisted tetrahedral geometry, and the zinc atom is coordinated with two iodine atoms and also with two phosphorus atoms of S-BINAP.

2. A method for preparing a mononuclear chiral zinc complex material according to claim 1, characterized in that, Includes the following steps: (1) Dissolve 0.1 mmol of zinc iodide in tetrahydrofuran; (2) Dissolve 0.1 mmol S-BINA in dichloromethane; (3) Mix the two solutions obtained in step (1) and step (2) to obtain a clear yellow solution. Stir the solution to make it evenly mixed. (4) The uniformly mixed clear yellow solution obtained in step (3) is rotary evaporated on a rotary evaporator to obtain a yellow powder; (5) Add 3 mL of dichloromethane to the yellow powder obtained by rotary evaporation and transfer it to a test tube. Then add 6 mL of petroleum ether and diffuse for 2 days to obtain colorless block crystals.

3. A rapid, large-scale synthesis method for the chiral zinc complex material according to claim 1, characterized in that, Includes the following steps: (1) Dissolve 0.1 mmol of zinc iodide in tetrahydrofuran; (2) Dissolve 0.1 mmol S-BINA in dichloromethane; (3) Mix the two solutions obtained in step (1) and step (2) to obtain a clear yellow solution. Stir the solution to make it evenly mixed. (4) The uniformly mixed yellow clear solution obtained in step (3) is rotary evaporated on a rotary evaporator to obtain yellow powder.

4. A method for preparing a polymethyl methacrylate film doped with the chiral zinc complex material of claim 1, characterized in that, Includes the following steps: (1) Weigh 0.004 g of zinc complex material S-Zn(BINAP)I2 crystals or powder and 0.0096 g of polymethyl methacrylate and dissolve them together in 1 mL of dichloromethane. Stir until completely dissolved to obtain a colorless and clear solution. (2) The completely dissolved colorless and clear solution is dropped onto a quartz plate and dried to obtain a film.

5. A method for preparing a polymethyl methacrylate film doped with the chiral zinc complex material of claim 1 and fluorene, characterized in that, Includes the following steps: (1) Weigh 0.004g of zinc complex material S-Zn(BINAP)I2 crystals or powder, 0.0096g of polymethyl methacrylate and 0.001g of rubrene and dissolve them together in 1mL of dichloromethane. Stir until completely dissolved to obtain a clear orange solution. (2) Drop the completely dissolved orange clear solution onto a quartz plate and dry it to obtain a film.

6. The application of the chiral zinc complex material of claim 1 in dynamic multi-layer anti-counterfeiting and advanced information encryption.

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