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

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

Active Publication Date: 2019-02-26
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 qu

Method used

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

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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 and a preparation method and application thereof. The preparation method comprises: uniformly mixing an amine compound and concentrated phosphoric acid in a solvent to obtain a mixed reaction liquid, rapidly heating the mixed reaction liquid to 100 to 200 DEG C, and then performing post treatment to obtain the ultra-long-life room temperature phosphorescent material. The phosphorescent material can emit visible green phosphorescence and delayed fluorescence after the excitation of ultraviolet light is stopped.A decay life is 1.18s. The naked eye resolution time is 10s or more. The phosphorescent properties are stable. The acid and base resistance and photobleaching performances are good. The phosphorescentmaterial has a high yield. The preparation method has fast and simple processes, does not need complicated and expensive equipment and is easy to industrialize. The carbon dots are self-aggregated, the triplet state is effectively and stably excited in the solid state and the oxygen is isolated. The phosphorescent material is bright, has a long phosphorescence life and is free of combination andcoating with other bases.

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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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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