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Full-color room-temperature phosphorescent carbon dots under visible light excitation and composition thereof

A room temperature phosphorescence and visible light technology, applied in luminescent materials, identification devices, instruments, etc., to achieve high application value, strong penetration, and the effect of promoting transformation

Active Publication Date: 2021-08-06
宁波萃英化学技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still a great challenge to synthesize full-color carbon dot-based room-temperature phosphorescent materials excited by visible light.

Method used

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  • Full-color room-temperature phosphorescent carbon dots under visible light excitation and composition thereof
  • Full-color room-temperature phosphorescent carbon dots under visible light excitation and composition thereof
  • Full-color room-temperature phosphorescent carbon dots under visible light excitation and composition thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0038] A full-color room-temperature phosphorescent carbon dot excited by visible light is composed of primary color carbon dots and polyacrylamide, and the mass ratio of the primary color carbon dots to polyacrylamide is 1:10~1500. The base color carbon dots are used as the main body, polyacrylamide is used as the composite matrix, and the base color carbon dots are uniformly dispersed in the polyacrylamide polymer matrix.

[0039] The base color carbon point is selected from one of blue carbon point, green carbon point, yellow carbon point and red carbon point; the synthetic raw materials of blue carbon point are resorcinol and sodium hydroxide; the synthesis of green carbon point The raw materials are m-phenylenediamine and disodium edetate; the synthetic raw materials of yellow carbon dots are m-phenylenediamine and glucose; the synthetic raw materials of red carbon dots are biomass pomegranate peel and potassium thiocyanate.

[0040] The preparation method of the blue car...

Embodiment 1

[0046] This embodiment provides a method for preparing blue phosphorescent materials in full-color room temperature phosphorescent carbon dots excited by visible light, which includes the following steps:

[0047] (1) Dissolve 0.05g resorcinol in sodium hydroxide solution (7.5mL, 10mol / L) to obtain a mixed solution;

[0048] (2) Put the mixed solution obtained in step (1) into a 25mL polytetrafluoroethylene autoclave, and heat it at 140°C for 12 hours to obtain the initial solution of carbon dots;

[0049] (3) Add 10 mL of distilled water to the initial solution obtained in step (2), ultrasonicate for 15 minutes, filter the solution to remove insoluble matter, centrifuge the obtained solution at a speed of 3000 rpm for 15 minutes, wash with water 3 times, and take the upper layer solution, And the upper layer solution was dialyzed for 24 hours, and freeze-dried for 36 hours to obtain carbon dot powder;

[0050] (4) Mix and dissolve 1 mg of the carbon dot powder obtained in st...

Embodiment 2

[0053] This embodiment provides a method for preparing a green phosphorescent material in full-color room temperature phosphorescent carbon dots excited by visible light, which includes the following steps:

[0054] (1) Dissolve 0.05g m-phenylenediamine and 0.1g disodium edetate in 7.5mL ultrapure water to obtain a mixed solution;

[0055] (2) Put the mixed solution obtained in step (1) into a 25mL polytetrafluoroethylene autoclave, and heat it at 140°C for 12 hours to obtain the initial solution of carbon dots;

[0056] (3) Add 10 mL of distilled water to the initial solution obtained in step (2), ultrasonicate for 15 minutes, filter the solution to remove insoluble matter, centrifuge the obtained solution at a speed of 3000 rpm for 15 minutes, wash with water 3 times, and take the upper layer solution, And the upper layer solution was dialyzed for 24 hours, and freeze-dried for 36 hours to obtain carbon dot powder;

[0057] (4) Mix and dissolve 1 mg of the carbon dot powder...

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Abstract

The invention discloses full-color room-temperature phosphorescent carbon dots under visible light excitation and a composition thereof, wherein the full-color room-temperature phosphorescent carbon dots are formed by compounding primary-color carbon dots and polyacrylamide, the primary-color carbon dots are used as a main body, the polyacrylamide is used as a composite matrix, and the primary-color carbon dots are uniformly dispersed in a polyacrylamide polymer matrix. The phosphorescent carbon dots can generate phosphorescence under the excitation of visible light, are excited by visible light, have the characteristics of low phototoxicity, high penetrability and the like, are easier to trigger room-temperature phosphorescence, have high application value, belong to a room-temperature phosphorescence material with matrix doping, and have longer service life than a room-temperature phosphorescence material without matrix doping. According to the full-color room-temperature phosphorescent carbon dots under the excitation of visible light, every two of the carbon dots are combined to form a composition, and thermal activation delayed fluorescence and phosphorescence phenomena can be generated, so that possibility is provided for advanced information storage and safety protection application.

Description

technical field [0001] The invention relates to the technical field of luminescent material production, in particular to a full-color room-temperature phosphorescent carbon dot excited by visible light and a composition thereof. Background technique [0002] At present, fluorescent materials are a powerful tool for the application of light-emitting devices, but the current fluorescent devices have unavoidable shortcomings, because the singlet state has only a short nanosecond lifetime, and its quantum yield is limited. In contrast, phosphorescent materials have the advantage of greatly improving yields and longer lifetimes. It has attracted much attention due to its low cost, environmental friendliness, inherent feasible versatility, and good processability. [0003] Anti-counterfeiting based on phosphorescence has significant advantages over fluorescent anti-counterfeiting. Phosphorescent anti-counterfeiting marks themselves have the characteristics of emitting fluorescen...

Claims

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Application Information

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IPC IPC(8): C09K11/65G09F3/02
CPCC09K11/65G09F3/02
Inventor 于洪梅陈伟王惠永吴涛
Owner 宁波萃英化学技术有限公司
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