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Ultra-long life room temperature phosphorescent material, its preparation method and application

A room-temperature phosphorescence and ultra-long-life technology, applied in the field of material science, can solve problems such as unfavorable naked eye observation, limitation of carbon quantum dot phosphorescence and delayed fluorescence performance, and achieve stable phosphorescence performance, stable and excellent phosphorescence emission performance, acid and alkali resistance good corrosion effect

Active Publication Date: 2021-10-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the solid polymer matrix is ​​very important because it can effectively quench the triplet excitons of carbon quantum dots by isolating oxygen, but it also limits the final form of the phosphorescent material, which greatly limits the phosphorescence of carbon quantum dots. And the application of delayed fluorescence performance; at the same time, the phosphorescence decay life of this material is only milliseconds, which is not conducive to naked eye observation, which seriously limits the application and promotion of this material

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  • Ultra-long life room temperature phosphorescent material, its preparation method and application
  • Ultra-long life room temperature phosphorescent material, its preparation method and application
  • Ultra-long life room temperature phosphorescent material, its preparation method and application

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preparation example Construction

[0036] An aspect of the embodiments of the present invention provides a method for preparing an ultra-long-life room temperature phosphorescent material (also called carbon quantum dots, referred to as carbon dots), which includes:

[0037] Mix the amine compound and concentrated phosphoric acid in a solvent to form a mixed reaction solution;

[0038] The mixed reaction solution is rapidly heated to 100-200° C. for reaction, and then post-treated to obtain an ultra-long-life room temperature phosphorescent material.

[0039] In some embodiments, the volume ratio of the amine compound, concentrated phosphoric acid and solvent is 500-2000:1000-4000:4000-10000, that is, the mixed reaction solution contains 500-2000 parts by volume of the amine compound, concentrated phosphoric acid 1000-4000 parts by volume and 4000-10000 parts by volume of the solvent.

[0040] Preferably, the amine compounds include ethylenediamine, butylenediamine, hexamethylenediamine, ethylamine, cysteamine...

Embodiment 1

[0069] Example 1 The raw materials for the preparation of the ultra-long-life room temperature phosphorescent material in this example include the following materials in parts by weight: 2,000 parts of ethylenediamine, 4,000 parts of concentrated phosphoric acid, and 8,000 parts of water.

[0070] The preparation method of the ultra-long-life room temperature phosphorescent material of this embodiment includes:

[0071] After dispersing 2000 parts of ethylenediamine in 8000 parts of water, add 4000 parts of concentrated phosphoric acid to obtain a solution A dispersion;

[0072] Put the solution A dispersion in a microwave reactor for microwave heating reaction, the microwave power is 750W, the reaction temperature is 200°C, the reaction time is 2min, and then cooled to room temperature to obtain the initial product;

[0073] Add an appropriate amount of water to dissolve the initial product; use sodium hydroxide solution to neutralize and adjust the pH to 10;

[0074] After ...

Embodiment 2

[0077] Example 2 The raw materials for the preparation of the ultra-long-life room temperature phosphorescent material in this example include the following materials in parts by weight: 500 parts of ethylenediamine, 4000 parts of concentrated phosphoric acid, and 10000 parts of water.

[0078] The preparation method of the ultra-long-life room temperature phosphorescent material of this embodiment includes:

[0079] After dispersing 500 parts of ethylenediamine in 10000 parts of water, add 4000 parts of concentrated phosphoric acid to obtain a solution A dispersion;

[0080] Put the A dispersion in a microwave reactor for microwave heating reaction, the microwave power is 500W, the reaction temperature is 100°C, the reaction time is 30min, and then cooled to room temperature to obtain the initial product;

[0081] Add an appropriate amount of water to dissolve the initial product; use sodium hydroxide solution to neutralize and adjust the pH to 10;

[0082] After the obtaine...

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Abstract

The invention discloses an ultra-long-life room temperature phosphorescent material, its preparation method and application. The preparation method includes: uniformly mixing the amine compound and concentrated phosphoric acid in a solvent to form a mixed reaction solution, rapidly heating the mixed reaction solution to 100-200°C and reacting, and then performing post-treatment to obtain a super long-life room temperature phosphorescent material. After the ultraviolet light excitation stops, the phosphorescent material can emit green phosphorescence and delayed fluorescence that can be distinguished by the naked eye. Corrosion and photobleaching performance is good. The phosphorescent material of the present invention has high output, simple and rapid preparation process, no need for complex and expensive equipment, and is easy to realize industrial production, and the carbon dots are self-assembled to effectively and stably excite the triplet state in the solid state and isolate the influence of oxygen, so that the phosphorescent material has Bright, long-lived phosphorescent emission does not need to be compounded or coated with other substrates.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a room temperature long-life phosphorescent material, in particular to an ultra-long life room temperature carbon-containing phosphorescent material, its preparation method and application. Background technique [0002] Compared with fluorescence performance, phosphorescence emission has more application advantages in many fields due to its longer signal emission, such as in optical anti-counterfeiting, time-resolved imaging and other fields. For example, the patent with the publication number CN201410466811 discloses a multi-emission anti-counterfeiting ink with phosphorescent emission properties, which can realize multiple excitations of anti-counterfeiting marks to realize anti-counterfeiting applications. However, the existing phosphorescent materials are usually based on organic molecules, the preparation process is complicated, the luminous life is short, the naked eye is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65C09K11/02
CPCC09K11/025C09K11/65
Inventor 林恒伟蒋凯
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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