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Naphthalene acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid and application thereof in merchandise anti-counterfeiting marks

A technology of fluorescent materials and naphthalene dicarboxylic acid, which is applied in the field of commodity anti-counterfeiting labels, achieving the effects of high repeatability, convenient operation and strong thermal stability

Active Publication Date: 2017-06-23
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, anti-counterfeiting materials with high temperature resistance have not yet been excavated

Method used

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  • Naphthalene acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid and application thereof in merchandise anti-counterfeiting marks
  • Naphthalene acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid and application thereof in merchandise anti-counterfeiting marks
  • Naphthalene acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid and application thereof in merchandise anti-counterfeiting marks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 0.3664g (1.0mmol) EuCl 3 ·6H 2 O, 0.1081g (0.5mmol) 2,6-naphthalene dicarboxylic acid and 1.5mL 1-propyl-3-methylimidazole iodide were added to a 25mL polytetrafluoroethylene-lined reactor, mixed well, and then reacted The still was placed in an oven, reacted at 160°C for 5 days, cooled to room temperature, and washed with ethanol to obtain a light yellow transparent square flake naphthalene dicarboxylic acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid, such as figure 1 As shown, its structural unit is Eu(NDC)(H 2 O)Cl, NDC means 2,6-naphthalene dicarboxylate that has lost two protons on the carboxyl group, which belongs to the monoclinic crystal system, and the space group is P 2 1 / c, the cell parameters are: α=γ=90°, β=100.323(2)°, unit cell volume Z=10.

[0019] The inventor used the solid-state fluorescence test method to excite the above-mentioned fluorescent probes at a wavelength of 271nm to perform fluorescence performance ...

Embodiment 2

[0022] Application of naphthalene dicarboxylic acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid as anti-counterfeit marking material in embodiment 1

[0023] 1. Iron plate simple analog anti-counterfeiting mark

[0024] The naphthalene dicarboxylic acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid is placed on the iron plate to form a simple analog anti-counterfeiting mark. Use a lighter to heat the fluorescent material on the iron plate and irradiate it with an ultraviolet lamp to observe the luminescent phenomenon of the fluorescent material. The initial fluorescent material emits relatively strong red light. After heating for about 19 seconds, the red light emitted by the simulated anti-counterfeiting label gradually weakens until it finally disappears and is completely quenched; then, remove the lighter and continue to use the ultraviolet lamp After irradiation, the red light emitted by the simulated anti-counterfei...

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Abstract

The invention discloses a naphthalene acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid and application of the naphthalene acid-europium fluorescent material as a merchandise anti-counterfeiting mark material. The structural unit of the fluorescent material is Eu(NDC)(H2O)Cl, wherein NDC indicates 2,6-naphthalene dicarboxylate radical without two protons on carboxyl. The fluorescent material disclosed by the invention has an excellent red fluorescence quenching-recovery performance, under the irradiation of an ultraviolet light, bright red is displayed, the temperature is increased to 200 DEG C from 25 DEG C, the fluorescence quenching rate reaches 100%, the temperature is decreased to 25 DEG C from 200 DEG C, the fluorescence intensity is almost recovered to original intensity, and little time is consumed; under the irradiation of the ultraviolet lamp, the fluorescent material is heated by using a lighter and can be completely quenched within about several seconds, when the lighter is moved away, extremely high fluorescence intensity can be recovered within about twenty seconds, and the process is repeated for several times, so that the fluorescence intensity is still relatively high, the heat resistance is high, the repeatability is high, and the fluorescent material can be used as an anti-counterfeiting mark material used for merchandise anti-counterfeiting marks in commerce.

Description

technical field [0001] The invention belongs to the technical field of commodity anti-counterfeiting labels, in particular to a naphthalene dicarboxylic acid-europium fluorescent material based on 2,6-naphthalene dicarboxylic acid, and the application of the fluorescent material in commodity anti-counterfeiting labels. Background technique [0002] Anti-counterfeit materials mainly refer to the basic materials needed to make anti-counterfeit labels and anti-counterfeit cards. The common feature of these materials is that there is a certain degree of difficulty in the process of producing these materials, or the cost is relatively high. Anti-counterfeiting materials include non-fluorescent paper, fragile film, laser film, laser paper, foam film, etc. However, these anti-counterfeiting materials are generally materials used at room temperature, and there are very few anti-counterfeiting materials used at high temperatures. This type of material has the disadvantage of working...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06B42D25/36
CPCB42D25/36C07F5/003C09K11/06C09K2211/182
Inventor 徐玲申美琳刘冰焦桓
Owner SHAANXI NORMAL UNIV
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