Application of d-a type organic doped crystal afterglow material in anti-counterfeiting

A D-A, acceptor material technology, applied in the direction of analysis of materials, material excitation analysis, material analysis by optical means, etc., can solve the problems of short afterglow time of organic long afterglow materials, materials can not be recognized by the naked eye, etc., and achieve good afterglow. The effect of luminous properties

Active Publication Date: 2021-08-31
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phenomenon of pure organic LPL can only be observed in harsh environments such as ultra-low temperature, oxygen-free, and strong ultraviolet light. Therefore, the related field is still in the basic research stage. It can be recognized by naked eyes, so this limits the application of organic long-lasting afterglow materials in anti-counterfeiting to a large extent

Method used

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  • Application of d-a type organic doped crystal afterglow material in anti-counterfeiting
  • Application of d-a type organic doped crystal afterglow material in anti-counterfeiting
  • Application of d-a type organic doped crystal afterglow material in anti-counterfeiting

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Embodiment 1

[0088] Application of a D-A type organic doped crystal afterglow material in anti-counterfeiting. In this embodiment, the composition of the D-A type organic doped crystal afterglow material is that the acceptor material A forms regular flaky crystals, and the donor material D is uniformly and freely dispersed on the acceptor material. In the flaky crystal of bulk material A, the preparation method of D-A type organic doped crystal afterglow material comprises the following steps:

[0089] Mix the donor material D (W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to absolute ethanol to obtain a suspension, ultrasonicate the suspension for 1 min, and then place it in an atmospheric environment at room temperature 20-25 °C After standing for 1 hour, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (W / PPT), wherein, calculated by molar ratio, the ratio of donor material D to accept...

Embodiment 2

[0108] Application of a D-A type organic doped crystal afterglow material in anti-counterfeiting. The composition of the D-A type organic doped crystal afterglow material is that the acceptor material A forms regular flaky crystals, and the donor material D is uniformly and freely dispersed in the acceptor material A. between the flaky crystals. The preparation method of D-A type organic doped crystal afterglow material (2M-W / PPT), comprises the following steps:

[0109] Mix the donor material D (2M-W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to anhydrous ethanol to obtain a suspension, ultrasonicate the suspension for 2 minutes, and then place it in a room temperature of 20-25°C After standing for 3 hours in the atmospheric environment, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (2M-W / PPT), in which, calculated by molar ratio, the ratio of donor material D to accept...

Embodiment 3

[0128] Application of a D-A type organic doped crystal afterglow material in anti-counterfeiting. The composition of the D-A type organic doped crystal afterglow material is that the acceptor material A forms regular flaky crystals, and the donor material D is uniformly and freely dispersed in the acceptor material A. between the flaky crystals. The preparation method of the above-mentioned D-A type organic doped crystal afterglow material comprises the following steps:

[0129] Mix the donor material D (4M-W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to anhydrous ethanol to obtain a suspension, ultrasonicate the suspension for 2 minutes, and then place it in a room temperature of 20-25°C After standing for 3 hours in the atmospheric environment, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (4M-W / PPT), wherein, calculated by molar ratio, the ratio of donor material D to...

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Abstract

The invention discloses the application of a D-A type organic doped crystal afterglow material in anti-counterfeiting. The substance to be determined not containing the D-A type organic doped crystal afterglow material is defined as fake, and the substance containing the D-A type organic doped crystal afterglow material is defined as fake. A substance to be determined doped with a crystal afterglow material is defined as true, and when authenticity is discriminated, the substance to be determined is irradiated with ultraviolet-visible excitation light, and when the substance to be determined emits long afterglow light, it is determined that the substance to be determined is true; when When the substance to be determined does not emit long-lasting light, it is determined that the substance to be determined is false. The D-A type organic doped crystal afterglow material of the present invention can stably exhibit afterglow performance in solid powder, and can disappear after high-temperature calcination without affecting the performance of solid powder.

Description

technical field [0001] The invention belongs to the technical field of organic long afterglow crystal materials, and specifically relates to the application of a D-A type organic doped crystal afterglow material in anti-counterfeiting. Background technique [0002] Anti-counterfeiting is widely used in all walks of life. For example, the authenticity of oil in the petrochemical industry is directly related to the life of equipment or vehicles; the authenticity of raw materials in the production industry directly affects the quality of products; medicine or tobacco in life The authenticity of the industry is directly related to the health of the people; the authenticity of pesticides and fertilizer seeds in agricultural production is directly related to the livelihood of the people, so anti-counterfeiting is very important. Anti-counterfeiting materials are the basis of anti-counterfeiting technology, and the development of good anti-counterfeiting materials is the key to pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/64G01N21/6408G01N2021/6417
Inventor 汪天洋胡文平冯文慧韩江丽
Owner TIANJIN UNIV
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