A kind of preparation method of metal-doped fluorescent carbon quantum dots

A carbon quantum dot, metal-doped technology, applied in fluorescence/phosphorescence, chemical instruments and methods, preparations for in vivo tests, etc., can solve the problems of less metal doping, strong application limitations, and high cytotoxicity , to achieve the effect of simple synthesis method, good fluorescence emission and wide application range

Active Publication Date: 2021-12-03
WUHAN INSTITUTE OF TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for preparing metal-doped fluorescent carbon quantum dots to solve the problem of low metal doping, low yield, strong application limitations, and problems in existing metal-doped carbon quantum dots. The issue of greater cytotoxicity

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  • A kind of preparation method of metal-doped fluorescent carbon quantum dots
  • A kind of preparation method of metal-doped fluorescent carbon quantum dots
  • A kind of preparation method of metal-doped fluorescent carbon quantum dots

Examples

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Embodiment 1

[0039] A method for preparing metal-doped fluorescent carbon quantum dots, which specifically comprises the following steps:

[0040] 1) Dissolve 10 mg of tetraphenylmanganese porphyrin (MnTPP) in 4 mL of tetrahydrofuran to obtain liquid A. At this time, the mass concentration of tetraphenyl manganese porphyrin (MnTPP) in THF is 2.5 mg / mL;

[0041] 2) Dissolve 2 g of citric acid in 40 mL of water to obtain liquid B. At this time, the mass concentration of citric acid in water is 50 mg / mL;

[0042] 3) Mix liquid A and liquid B, and perform ultrasonic dispersion to obtain mixed liquid C, wherein the volume ratio of tetrahydrofuran in liquid A to water in liquid B is 1:10, and the dispersion time of ultrasonic dispersion is 20 minutes;

[0043] 4) Put the mixed solution C in an oil bath at 180°C for heating in an oil bath. After the mixed solution C becomes viscous, add 3 mL of water and continue the reaction. Repeat this process 5 times to obtain the reaction solution D;

[004...

Embodiment 2

[0046] The difference between this example and Example 1 is that the metalloporphyrin compound is tetraphenyl zinc porphyrin (ZnTPP).

Embodiment 3

[0048] The difference between this example and Example 1 is that the metalloporphyrin compound is tetraphenylcopper porphyrin (CuTPP).

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Abstract

The invention provides a method for preparing metal-doped fluorescent carbon quantum dots, which comprises the following steps: 1) dissolving metal porphyrin compounds in tetrahydrofuran to obtain liquid A; 2) dissolving polycarboxylic acid compounds in water to obtain liquid B 3) Mix liquid A and liquid B, and carry out ultrasonic dispersion to obtain mixed liquid C; 4) Heat the mixed liquid C in an oil bath, and when the mixed liquid C becomes viscous, add water and continue the reaction for several times Repeating this process to obtain a reaction solution D; 5) adding water to the reaction solution D and adjusting the pH value with an alkaline reagent, then dialyzing the supernatant of the reaction solution D, collecting the dialyzed aqueous solution, and lyophilizing the aqueous solution to obtain Metal-doped fluorescent carbon quantum dots. In the present invention, under hydrothermal conditions, the water-soluble polycarboxylic acid compound is used to wrap the insoluble metal porphyrin compound, so that the metal doping rate and yield of the prepared metal-doped fluorescent carbon quantum dot are high. , low toxicity and wide application range.

Description

technical field [0001] The invention relates to the technical field of nano-luminescent materials, in particular to a method for preparing metal-doped fluorescent carbon quantum dots. Background technique [0002] With the rapid development of nanotechnology, new nano-fluorescent materials mainly include two categories: semiconductor quantum dots and carbon quantum dots, which are widely used in biological imaging because of their simple preparation, photobleaching resistance, high photosensitivity and wide dynamic range. , medical diagnosis, analytical testing and other fields. Among them, carbon quantum dots have attracted widespread attention due to their low toxicity and excellent biocompatibility. The current metal-doped carbon quantum dots are obtained by adding citric acid, organic amines, and inorganic metal ions by the hydrothermal method. Quantum dots have disadvantages such as strong application limitations and high cytotoxicity. Therefore, it is of great pract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65A61K49/00G01N21/64B82Y20/00B82Y30/00
CPCA61K49/0017B82Y20/00B82Y30/00C09K11/65G01N21/64
Inventor 吴风收乐亮亮孙琦王凯
Owner WUHAN INSTITUTE OF TECHNOLOGY
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