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Dye/metal-organic framework composite material for anti-counterfeiting and information encryption and preparation method thereof

An organic framework, composite material technology, applied in organic chemistry methods, 2/12 group organic compounds without C-metal bonds, cadmium organic compounds, etc., can solve the problems of invasive stimulation, environmental damage, etc., and achieve non-radiative transition Effects of inhibition, mild conditions, strong fluorescence emission properties

Pending Publication Date: 2022-05-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these stimuli-responsive luminescent materials either rely on constant addition of chemicals or require invasive stimuli, which are harmful to the environment.

Method used

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  • Dye/metal-organic framework composite material for anti-counterfeiting and information encryption and preparation method thereof
  • Dye/metal-organic framework composite material for anti-counterfeiting and information encryption and preparation method thereof
  • Dye/metal-organic framework composite material for anti-counterfeiting and information encryption and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of metal-organic framework materials containing Cd, the specific synthetic route is as follows:

[0030] Dissolve cadmium chloride (0.039 mmol) and 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine (0.022 mmol) in 1 mL of dimethylformamide, 3 mL of acetonitrile, 3 mL of water, and 20 μL of 3mol / L of nitric acid. In a 20 mL glass vial by sonication for 10 min. The reaction mixture was heated to 110°C for 48 hours and then cooled to room temperature. Then the colorless crystals were collected by filtration, washed with excess dimethylformamide and ethanol to obtain single crystals of metal-organic framework materials containing Cd, and dried in vacuum at room temperature. According to single crystal X-ray diffraction analysis, metal-organic framework materials containing Cd have a long-range ordered crystal structure and a regular three-dimensional pore structure. Viewed from the a-axis, the window size is about

[0031] (2) Loading spiropyran (SP) on Cd-cont...

Embodiment 2

[0035] (1) Preparation of metal-organic framework materials containing Zn, the specific synthetic route is as follows:

[0036] Dissolve zinc nitrate (0.08mmol) and 1,2,4,5-tetrakis(4-carboxyphenyl)benzene (0.02mmol) in 0.5mL diethylformamide, 3mL acetonitrile, 3mL water and 40μL 3mol / L nitric acid. In a 20 mL glass vial by sonication for 10 min. The reaction mixture was heated to 120°C for 24 hours and then cooled to room temperature. Then, the colorless crystals were collected by filtration, washed with excess diethylformamide and ethanol to obtain Zn-containing metal-organic framework material crystals, and dried in vacuum at room temperature.

[0037] (2) Loading diarylethene (DAE) on Zn-containing metal-organic framework materials

[0038] Crystals of Zn-containing metal-organic framework materials were soaked in a methanol solution of diarylethene (DAE) at a concentration of 0.1 mM at 40° C. for 24 hours to obtain DAE / Zn-containing metal-organic framework composites. ...

Embodiment 3

[0041] (1) Preparation of metal-organic framework materials containing Mg, the specific synthetic route is as follows:

[0042] Dissolve magnesium nitrate (0.02mmol) and 1,2,4,5-tetrakis(4-carboxyphenyl)-3,6-dimethylbenzene (0.02mmol) in 1mL dimethylacetamide, 3mL acetonitrile, 3mL h 2 O and 30 μL of 3mol / L nitric acid. In a 20 mL glass vial by sonication for 10 min. The reaction mixture was heated to 130°C for 72 hours and then cooled to room temperature. Then, the colorless crystals were collected by filtration, washed with excess dimethylacetamide and ethanol to obtain Mg-containing metal-organic framework material crystals, which were vacuum-dried at room temperature for future use.

[0043] (2) Loading azobenzene (AZO) on Mg-containing metal-organic framework materials

[0044] The crystals of Mg-containing metal-organic framework materials were immersed in a methanol solution of azobenzene (AZO) with a concentration of 5.0 mM at 50° C. for 72 hours to obtain AZO / meta...

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Abstract

The invention relates to a dye / metal-organic framework composite material for anti-counterfeiting and information encryption and a preparation method of the dye / metal-organic framework composite material. The preparation method comprises the following steps: preparing a metal-organic framework material, soaking the metal-organic framework material in a solution containing spiropyrane, azobenzene and other dyes, and filtering to obtain the composite material with excellent luminescence property. The composite material can realize dynamic switching from blue light to red light and multi-color display by alternately using ultraviolet light and visible light irradiation within a very short time, so that anti-counterfeiting and information encryption application is realized, and the composite material has very high stability and fatigue resistance and is an intelligent anti-counterfeiting technology with a very good application prospect.

Description

technical field [0001] The invention relates to a dye / metal-organic framework composite material for anti-counterfeiting and information encryption and a preparation method thereof. Under the irradiation of ultraviolet light and visible light alternately, the material can realize dynamic switching from blue light to red light and multiple color display, so as to realize anti-counterfeiting and information encryption applications. Background technique [0002] With the rapid development of new materials and encryption and decryption technology, anti-counterfeiting technology has rapidly expanded from original watermarks to color-changing inks, luminous patterns, etc. Among these techniques, light-emitting patterns have attracted much attention due to their wide variety and ease of manipulation of light-emitting materials. Dynamic color-changing luminescent materials have great application potential in information security, data encryption, anti-counterfeiting and multiple bi...

Claims

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Application Information

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IPC IPC(8): C09K9/02C07F3/06C07F3/08C07F3/02C08G83/00C09B67/02G06T1/00G06F21/60
CPCC09K9/02C07F3/003C08G83/008C09B67/0097G06T1/0021G06F21/602C09K2211/186C09K2211/188C09K2211/1092C09K2211/1007C09K2211/1033C07B2200/13
Inventor 崔元靖郑和奇钱国栋杨雨
Owner ZHEJIANG UNIV
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