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A preparation method of anti-counterfeiting material responding to multiple optical signals regulated by spin conversion

A spin conversion and optical signal technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of anti-counterfeiting materials and achieve the effect of easy operation and simple process

Active Publication Date: 2020-07-31
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, anti-counterfeiting materials with multiple responses have been prepared by using organic fluorescent dye molecules, but there is no report on the preparation of anti-counterfeiting materials by using the synergistic effect of spin conversion and luminescent materials

Method used

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  • A preparation method of anti-counterfeiting material responding to multiple optical signals regulated by spin conversion
  • A preparation method of anti-counterfeiting material responding to multiple optical signals regulated by spin conversion
  • A preparation method of anti-counterfeiting material responding to multiple optical signals regulated by spin conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 48 mg FeL and 24 mg Tb-MOFs and mix them uniformly to obtain a composite material. The characteristics of the obtained composite material are: FeL is in a high spin state at room temperature, the composite material is white when irradiated by sunlight, and has strong green fluorescence when irradiated by ultraviolet light. However, at low temperature (< 210K), FeL is in a low-spin state, and the composite material is purple when irradiated by sunlight, and has green fluorescence when irradiated by ultraviolet light. It can be seen that when multiple signals such as temperature, ultraviolet light and visible light are input, the composite material can output three different color signals.

Embodiment 2

[0017] Weigh 56 mg FeL and 14 mg Tb-MOFs and mix them uniformly to obtain a composite material. The characteristics of the obtained composite material are: FeL is in a high spin state at room temperature, the composite material is white when irradiated by sunlight, and has strong green fluorescence when irradiated by ultraviolet light. However, at low temperature (< 210K), FeL is in a low-spin state, and the composite material is purple when irradiated by sunlight, and has green fluorescence when irradiated by ultraviolet light. It can be seen that when multiple signals such as temperature, ultraviolet light and visible light are input, the composite material can output three different color signals.

Embodiment 3

[0019] Weigh 60 mg FeL and 10 mg Tb-MOFs and mix them uniformly to obtain a composite material. The characteristics of the obtained composite material are: FeL is in a high spin state at room temperature, the composite material is white when irradiated by sunlight, and has strong green fluorescence when irradiated by ultraviolet light. However, at low temperature (< 210K), FeL is in a low-spin state, and the composite material is purple when irradiated by sunlight, and dark green when irradiated by ultraviolet light. It can be seen that when multiple signals such as temperature, ultraviolet light and visible light are input, the composite material can output four different color signals. This ratio is the best mixing ratio, and its output color difference is the most obvious.

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Abstract

The invention discloses a method for preparing an anti-counterfeit material responding to multiple optical signals controlled by spin transition. According to the preparation method, a composite material is obtained by mixing a spin transition material with a luminescent material, and is characterized in that four types of color signals with a distinct difference can be output after inputting temperature, ultraviolet light and visible light signals. The composite material realizes an anti-counterfeiting function responding to the multiple optical signal by means of a regulating effect of the spin transition on light emission; furthermore, the synthesis method is simple, easy in actual operation, simple and convenient; the prepared anti-counterfeit material has higher concealment, strongeruniqueness and better anti-counterfeit effect when being applied to anti-counterfeiting.

Description

technical field [0001] The invention relates to a method for preparing an anti-counterfeiting material, in particular to a method for preparing an anti-counterfeiting material that can output multiple optical signals after inputting temperature, ultraviolet and visible light signals by utilizing the synergistic effect of a spin conversion material and a luminescent material. Background technique [0002] With the in-depth development of the market economy, people's material life has been greatly enriched, but when people enjoy life, they are also confused by a large number of fake and shoddy products flooding the market. Especially through the use of various high-tech fakes, anti-counterfeiting marks and anti-counterfeiting packaging, the original anti-counterfeiting measures are easy to lose their effect. In order to protect the rights and interests of consumers and the economic interests of businesses, research and development of various new and efficient anti-counterfeiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02
CPCC09K9/02C09K2211/182
Inventor 刘志亮万永艳宋丽君
Owner INNER MONGOLIA UNIVERSITY
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