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Preparation method of composite fluorescent micelle with dual wavelength detection and full spectrum modulation and its application in water-based anti-counterfeiting ink

A composite fluorescence, full spectrum technology, applied in the field of water-based anti-counterfeiting ink materials, can solve the problems of easy leakage of dye molecules, single detection wavelength, and large pollution.

Active Publication Date: 2021-09-14
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Single detection wavelength
[0008] (2) Single luminous color
[0010] (4) Dye molecules are prone to leakage and fluorescence quenching
[0011] The above problems will lead to low anti-counterfeiting safety level of anti-counterfeiting materials and relatively large pollution, which is not conducive to mass production and application

Method used

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  • Preparation method of composite fluorescent micelle with dual wavelength detection and full spectrum modulation and its application in water-based anti-counterfeiting ink
  • Preparation method of composite fluorescent micelle with dual wavelength detection and full spectrum modulation and its application in water-based anti-counterfeiting ink
  • Preparation method of composite fluorescent micelle with dual wavelength detection and full spectrum modulation and its application in water-based anti-counterfeiting ink

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0071] According to the fourth aspect of the present invention, the present invention provides a method for preparing a composite fluorescent micelle capable of dual-wavelength detection and full-spectrum adjustment, preferably including preparing the above-mentioned blue fluorescent micelles and red fluorescent micelles As well as the micelles that emit green fluorescence, the preparation method comprises the following steps:

[0072] Step 1, respectively preparing blue fluorescent micelles, red fluorescent micelles, and green fluorescent micelles;

[0073] Step 2, according to the three kinds of micelles prepared in step 1, it can be adjusted into a full-spectrum color material according to a certain mass ratio;

[0074] Preferably, in step 1,

[0075] Preparation of blue fluorescent micelles Including: adding L1 and block polymers to water according to the set ratio and sequence, optionally adding inorganic salts, vortexing evenly, and then obtaining blue fluorescent mic...

Embodiment 1

[0113] Preparation and characterization of embodiment 1 L1 (containing tetraphenylethylene compound)

[0114] With R=O(CH 2 CH 2 O) n , n=4 as an example, the preparation steps of L1 and the characterization of the product, the NMR spectrum of the characterization is shown in figure 1 , 1 HNMR, the solvent is heavy water.

[0115] The preparation reaction equation is as follows:

[0116]

[0117] Reaction preparation steps:

[0118] 1→3: compound 1 (3.3g), compound 2 (6.9g), K 2 CO 3 (4.97g) was refluxed in acetonitrile (250mL) solution, and N 2 Protected and reacted overnight. The product was subjected to column separation, using petroleum ether and ethyl acetate (volume ratio 3:1) as a developing solvent to obtain compound 3.

[0119] 3→5: Compound 3 (3.5 g), TsCl (1 g), triethylamine (0.67 g) were dissolved in dichloromethane (100 mL), and stirred overnight at room temperature. After the solvent was evaporated to dryness, compound 4 (1.8 g) and K were added 2...

Embodiment 2

[0121] Preparation and Characterization of Example 2 Blue Fluorescent Micelles

[0122] Preparation of fluorescent micellar systems that fluoresce blue. The specific preparation method is as follows, and the block polymer PMVP-b-PEO is taken as an example for illustration.

[0123] (1) Blu-ray micelles I: L1 (0.1019g) was first mixed with block polymer PMVP-b-PEO (0.1226g), then zinc salt (0.0297g zinc nitrate), water (100mL) was added, and mixed evenly; Get the product.

[0124] Fluorescence spectrum, TEM electron microscope, and dynamic light scattering test results of the product are shown in figure 2 , image 3 , Figure 4 .

[0125] (2) Blu-ray micelles II: L1 (0.1019g) and block polymer PMVP-b-PEO (0.2452g) were evenly mixed. The fluorescence spectrum and TEM electron microscope characterization of the product blue micelle II are shown in figure 2' , image 3 .

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Abstract

The invention provides a preparation method of a composite fluorescent micelle with dual-wavelength detection and full-spectrum adjustment and its application in water-based anti-counterfeiting inks. The composite fluorescent micelle includes a three-primary-color micellar solution capable of emitting red, green, and blue fluorescence , the blue fluorescent micelles contain tetraphenylethylene groups, and the red fluorescent and green fluorescent micelles contain rare earth complexes. All micelles are formed by complexing corresponding fluorescent components with block polymers. The composite fluorescent micelles have full-spectrum colors, are capable of dual-wavelength detection, and have good water resistance, excellent pH stability and salt stability, and can be used in water-based anti-counterfeiting inks, making the anti-counterfeiting inks have a higher level of anti-counterfeiting security. It can be stored for a long time, which is beneficial to popularization and application.

Description

technical field [0001] The invention relates to a fluorescent micellar material, in particular to a water-based anti-counterfeiting ink material capable of realizing dual-wavelength detection and full-spectrum color adjustment. Background technique [0002] Data security is a very important issue no matter for the government, industrial production or economic fields. Counterfeiting currency will have a great impact on social stability and reduce the credibility of the currency; counterfeiting medicine will cause serious harm to health; forging documents is a serious infringement. [0003] Taking my country's current situation as an example, the problem of forgery and counterfeiting is relatively serious. Every year, the banking system is defrauded by fake documents as much as more than 20 billion yuan. The anti-counterfeiting industry is the immediate field of combating counterfeiting. [0004] At present, the application field of anti-counterfeiting technology has gradual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/79
CPCC07D213/79C09D11/106C09D11/107C09D11/108C09D11/17C09D11/50C09K11/06C09K2211/1007C09K2211/1029C09K2211/182
Inventor 阎云武桐玥谢蒙琪黄建滨
Owner PEKING UNIV
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