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Carbon dots with high fluorescent quantum yield, and application thereof in fluorescent color development

A technology of fluorescence quantum yield and carbon dots, which is applied in the application field of fluorescent carbon nanomaterials, can solve problems such as rare research, and achieve the effects of simple post-processing, overcoming easy photobleaching, and low cost.

Inactive Publication Date: 2013-11-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the reports on the application of carbon dots are mostly about detection, photoelectric devices and biological imaging, and the application of fluorescent ink based on carbon dots is rarely studied.

Method used

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  • Carbon dots with high fluorescent quantum yield, and application thereof in fluorescent color development
  • Carbon dots with high fluorescent quantum yield, and application thereof in fluorescent color development
  • Carbon dots with high fluorescent quantum yield, and application thereof in fluorescent color development

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. Preparation of fluorescent carbon dots with high quantum yield

[0028] Blend 4mmol of citric acid and 1mmol of ethylenediamine in 5mL of deionized water and transfer it to a reaction kettle for hydrothermal reaction at 200°C for 7 hours. After the reaction, the reaction kettle was cooled to room temperature to obtain quantum The resulting carbon dot aqueous solution was spin-dried with a rotary evaporator, and further dried in a vacuum oven to obtain a 4:1 carbon dot solution.

[0029] 2.4:1 carbon dots as fluorescent ink for handwriting application

[0030] Configure 1mg / mL carbon dot aqueous solution as fluorescent ink, pour it into a commercial pen, and use the pen to write. The "fluorescent" writing cannot be observed under sunlight ( figure 1 a), only observed under UV light ( figure 1 b).

Embodiment 2

[0032] 1. Preparation of fluorescent carbon dots with high quantum yield

[0033] Blend 5mmol of citric acid and 5mmol of ethylenediamine in 10mL of deionized water and transfer to a reaction kettle for hydrothermal reaction at 200°C for 7 hours. After the reaction, the reaction kettle was cooled to room temperature to obtain quantum The carbon dot aqueous solution of productive rate, the carbon dot aqueous solution obtained is poured into the dialysis bag that molecular weight is 3500 and is dialyzed for 48h, gets the external liquid of dialysis and is spin-dried with a rotary evaporator, and further puts into a vacuum oven to dry, and obtains 5: 5 carbon dots.

[0034] 2.5:5 carbon dots as fluorescent ink for handwriting application

[0035] Configure 1mg / mL carbon dot aqueous solution as fluorescent ink, pour it into a commercial pen, and use the pen to write. The "fluorescent" writing cannot be observed under sunlight ( figure 1 a), only observed under UV light ( figure...

Embodiment 3

[0037] 1. Preparation of fluorescent carbon dots with high quantum yield

[0038] Blend 1mmol of citric acid and 4mmol of ethylenediamine in 5mL of deionized water and transfer it to a reaction kettle for hydrothermal reaction at 200°C for 7 hours. After the reaction, the reaction kettle was cooled to room temperature to obtain quantum The resulting carbon dot aqueous solution was spin-dried with a rotary evaporator, and further dried in a vacuum oven to obtain a 1:4 carbon dot solution.

[0039] 2.1:4 carbon dots as fluorescent ink for handwriting application

[0040] Configure 1mg / mL carbon dot aqueous solution as fluorescent ink, pour it into a commercial pen, and use the pen to write. The "fluorescent" writing cannot be observed under sunlight ( figure 1 a), only observed under UV light ( figure 1 d).

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Abstract

The invention relates to carbon dots with high fluorescent quantum yield, and an application thereof in fluorescent color development, and belongs to the application field of fluorescent carbon nanomaterials. Specifically, the invention relates to the carbon dots with the high fluorescent quantum yield which are synthesized by using citric acid and ethene diamine as raw materials as a fluorescent ink for writing or fluorescent printing, and further broadens the application thereof in fluorescent electrospining, fluorescent micro arrays and fluorescent composites. The carbon dots with the high fluorescent quantum yield are obtained by blending 1-100 mmol of citric acid and 1-100 mmol of ethene diamine in 5-100 mL of deionized water and transferring the mixture into a reaction kettle; carrying out a hydrothermal reaction for 2-10 hours at a temperature of 100-500 DEG C; cooling the reaction kettle to a room temperature after the reaction is finished to obtain a water solution of the carbon dots with the high fluorescent quantum yield; pouring the water solution of the carbon dots in a dialysis bag with a molecular weight of 3,500; dialyzing for 48-60 h; spin drying a dialysis outer solution and vacuum drying.

Description

technical field [0001] The invention belongs to the application field of fluorescent carbon nanomaterials, and specifically relates to a carbon dot with high fluorescent quantum yield synthesized from citric acid and ethylenediamine as a fluorescent ink for handwriting and fluorescent printing, and further expands its use in fluorescent electricity. Applications in spinning, fluorescent microarrays and fluorescent composites. Background technique [0002] In recent years, fluorescent carbon materials have been widely favored by people. Carbon dots (CDs) are an emerging carbon-based material with a size less than 10nm. Since it was first discovered in 2004 due to its cheap and abundant preparation raw materials, it has received extensive attention. Due to its stable chemical properties, low biological toxicity, and good biocompatibility, it has a wide range of potential applications in the fields of biomarkers, bioimaging, and drug delivery. [0003] The synthesis methods ...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00C09K11/65C01B32/15
Inventor 杨柏赵晓欢朱守俊华修芳杨冬蕊闫莹
Owner JILIN UNIV
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