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A thermally responsive phosphorescent material, its preparation method and application

A phosphorescent material and thermal response technology, which is applied in the fields of chemistry and material science, can solve the problems of difficult to reflect the performance advantages of carbon dots, limit the phosphorescence and delayed fluorescence performance of carbon quantum dots, and unfavorable naked eye observation, and achieve stable and excellent phosphorescence emission performance. Stable phosphorescence performance, acid and alkali corrosion resistance and good photobleaching performance

Active Publication Date: 2022-05-06
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
In addition, the phosphorescent properties of the material after curing are usually not affected by external stimuli, and are no different from conventional phosphorescent materials in application, and it is difficult to reflect the performance advantages of carbon dots

Method used

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  • A thermally responsive phosphorescent material, its preparation method and application
  • A thermally responsive phosphorescent material, its preparation method and application
  • A thermally responsive phosphorescent material, its preparation method and application

Examples

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preparation example Construction

[0036] One aspect of the embodiments of the present invention provides a method for preparing a thermally responsive phosphorescent material (also called carbon quantum dots, referred to as carbon dots), which includes:

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

[0038] The mixed reaction solution is rapidly heated to 80-180° C. for reaction, and then post-treated to obtain a thermally responsive phosphorescent material.

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

[0040] Preferably, the amine compounds are organic raw materials with amino groups (N), including ethylenediamine, butylenediamine, hexamethylenediamine, ethylamine, cysteamine, N-...

Embodiment 1

[0071] Example 1 The raw materials for the preparation of the heat-responsive phosphorescent material in this example include the following materials in parts by weight: 2000 parts of ethylenediamine, 4000 parts of concentrated phosphoric acid, and 8000 parts of water.

[0072] The preparation method of the thermally responsive phosphorescent material of this embodiment includes:

[0073] After dispersing 2000 parts of ethylenediamine in 8000 parts of water, add 4000 parts of concentrated phosphoric acid to obtain a solution A dispersion;

[0074] Put the solution A dispersion in an oil bath and heat it to 180°C, keep it warm for reaction, and cool it to room temperature after 2 hours to obtain the initial product;

[0075] Add an appropriate amount of water to dissolve the initial product; use sodium hydroxide solution to neutralize and adjust the pH value to 7;

[0076] After the obtained solution was centrifuged at high speed (6000 rpm) for 30 minutes, the supernatant was ...

Embodiment 2

[0080] Example 2 The raw materials for the preparation of the thermally responsive phosphorescent material in this example include the following materials in parts by weight: 2000 parts of hexamethylenediamine, 4000 parts of concentrated boric acid, and 8000 parts of water.

[0081] The preparation method of the thermally responsive phosphorescent material of this embodiment includes:

[0082] After dispersing 2000 parts of hexamethylenediamine in 8000 parts of water, add 4000 parts of concentrated boric acid to obtain a solution A dispersion;

[0083] Put the solution A dispersion in an oil bath and heat it to 80°C, keep it warm for reaction, and cool it to room temperature after 3 hours to obtain the initial product;

[0084] Add an appropriate amount of water to dissolve the initial product; use sodium hydroxide solution to neutralize and adjust the pH value to 5;

[0085] After the obtained solution was centrifuged at high speed (6000 rpm) for 30 minutes, the supernatant ...

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Abstract

The invention discloses a heat-responsive phosphorescent material, its preparation method and application. The preparation method comprises: uniformly mixing the amine compound and concentrated acid in a solvent to form a mixed reaction solution, rapidly heating the mixed reaction solution to 80-180° C. and reacting, and then post-processing to obtain a thermally responsive phosphorescent material . The heat-responsive phosphorescent material of the present invention can emit visible light when irradiated by ultraviolet light at room temperature and air, and after the irradiation of ultraviolet light stops, there is no obvious emission, and after simple heating treatment, it can emit green phosphorescence that can be distinguished by naked eyes. The lifespan can reach 1.39s, the naked eye resolution time is as long as 8-9 seconds, and the luminescence performance is stable, the acid and alkali corrosion resistance and photobleaching performance are good, and it can be easily and conveniently made into thin film, powder, block and other forms according to application requirements It is used and widely used, and its preparation process is simple and fast, and its yield is high, without complex and expensive equipment, and it is easy to realize industrial production.

Description

technical field [0001] The invention relates to a heat-responsive phosphorescent material, in particular to a heat-responsive phosphorescent material and a preparation method and application thereof, belonging to the technical fields of chemistry and material science. Background technique [0002] Stimuli-responsive optical materials have attracted much attention in the fields of sensing, detection, and anti-counterfeiting due to their sensitive performance changes to external stimuli such as light, electricity, heat, and magnetism. Compared with fluorescence, phosphorescence emission has more application advantages in related fields due to its longer time signal emission. It can be seen that stimuli-responsive phosphorescent materials can not only exert the advantages of phosphorescent performance, but also realize real-time feedback to external stimuli, which is an ideal choice for promoting related applications. Therefore, it is of great theoretical significance and appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65C09K11/02B82Y20/00B82Y40/00
CPCC09K11/65C09K11/025B82Y20/00B82Y40/00
Inventor 林恒伟蒋凯
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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