Application of D-A type organic doped crystal afterglow material in counterfeiting prevention

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

Active Publication Date: 2020-10-09
TIANJIN UNIV
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  • Summary
  • 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 counterfeiting prevention
  • Application of D-A type organic doped crystal afterglow material in counterfeiting prevention
  • Application of D-A type organic doped crystal afterglow material in counterfeiting prevention

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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 an application of a D-A type organic doped crystal afterglow material in counterfeiting prevention. The method comprises steps of defining a to-be-determined substance which does not contain the D-A type organic doped crystal afterglow material to be fake, defining the to-be-determined substance which contains the D-A type organic doped crystal afterglow material to be true, irradiating the to-be-determined substance with ultraviolet-visible exciting light during true and false judgment, and judging that the to-be-determined substance is true when the to-be-determined substance emits long afterglow light; and when the to-be-determined substance does not emit long afterglow light, judging that the to-be-determined substance is fake. The D-A type organic doped crystalafterglow material can stably present afterglow performance in solid powder and can disappear after high-temperature calcination, and the performance of the solid powder is not affected.

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] With the continuous development of the social economy, the anti-counterfeiting industry has gradually developed in order to adapt to the development of the market economy and the needs of commodity anti-counterfeiting. Anti-counterfeiting is an effective means to avoid the behavior of the main body of the market economy. etc. are widely used. For the domestic market where counterfeit goods are rampant, anti-counterfeiting has always been an important basis for consumers to judge the authenticity of merchants' products. Anti-counterfeiting can protect the brand image of products, not only can dispel consumers' hesitation and worries when purchasing, but also effectively protect consumers' legality. The most import...

Claims

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Application Information

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Patent Type & Authority Applications(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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