Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing fluorescence color adjustable carbon dots

A color and fluorescence technology, applied in fluorescence/phosphorescence, chemical instruments and methods, nano-optics, etc., to achieve the effect of improving quantum efficiency and wide selection range

Active Publication Date: 2019-02-01
HENAN UNIVERSITY
View PDF3 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still very important and a great challenge to build a scalable synthetic system for multicolored carbon dots covering the entire visible region, especially for long-wavelength light emission.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing fluorescence color adjustable carbon dots
  • Method for preparing fluorescence color adjustable carbon dots
  • Method for preparing fluorescence color adjustable carbon dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 160 mg of 1,6-dihydroxynaphthalene and 445 mg of N-bromosuccinimide at room temperature, put them into a 250 ml beaker, add 160 ml of ethanol, and sonicate until completely dissolved to obtain a mixture. Transfer the mixed solution to a 250 ml polytetrafluoro autoclave, heat to 160 °C, react for 4 h, cool the autoclave to room temperature naturally, and obtain a mixed solution of carbon dots, pass the mixed solution of carbon dots through a silica gel chromatographic column Separation and purification, the eluent is dichloromethane and methanol, the volume ratio of the two is 30:1. After the solvent is removed by rotary evaporation, the purified carbon dots are obtained, and the purified carbon dots are in the form of powder. The purified carbon dots were dissolved in methanol solvent to make a 0.1 mg / ml solution, and the carbon dot solution was excited with a 365nm excitation light source, and the carbon dot solution appeared orange.

Embodiment 2

[0038] Weigh 160 mg of 1,6-dihydroxynaphthalene and 445 mg of N-bromosuccinimide at room temperature, put them into a 250 ml beaker, add 160 ml of ethanol, and sonicate until completely dissolved to obtain a mixture. Transfer the mixed solution to a 250 ml polytetrafluoro autoclave, heat to 200 °C, react for 4 h, and cool the autoclave to room temperature naturally to obtain a carbon dot mixed solution, pass the carbon dot mixed solution through a silica gel chromatographic column Separation and purification, the eluent is dichloromethane and methanol, the volume ratio of the two is 30:1. After the solvent is removed by rotary evaporation, the purified carbon dots are obtained, and the purified carbon dots are in the form of powder. The purified carbon dots were dissolved in methanol solvent to make a 0.1 mg / ml solution, and the carbon dot solution was excited with a 365nm excitation light source, and the carbon dot solution appeared orange.

Embodiment 3

[0040]Weigh 160 mg of 1,6-dihydroxynaphthalene and 445 mg of N-bromosuccinimide at room temperature, put them into a 250 ml beaker, add 160 ml of ethanol, and sonicate until completely dissolved to obtain a mixture. Transfer the mixed solution to a 250 ml polytetrafluoro autoclave, heat it to 250 °C, react for 4 h, cool the autoclave to room temperature naturally, and obtain a mixed solution of carbon dots, pass the mixed solution of carbon dots through a silica gel chromatographic column Separation and purification, the eluent is dichloromethane and methanol, the volume ratio of the two is 30:1. After the solvent is removed by rotary evaporation, the purified carbon dots are obtained, and the purified carbon dots are in the form of powder. The purified carbon dots were dissolved in methanol solvent to make a 0.1 mg / ml solution, and the carbon dot solution was excited with a 365nm excitation light source, and the carbon dot solution appeared orange.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
quantum efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing fluorescence color adjustable carbon dots. According to the method, a diphenol compound is used as a carbon source, and under the action of an oxidizingagent, a carbon dot mixed liquor is generated by a solvothermal one-pot reaction; and then, the carbon dot mixed liquor is purified by column chromatography to obtain the carbon dots emitting variousfluorescence colors. By regulating the combination of the diphenol compound and the oxidizing agent, the fluorescence colors of the carbon dots are adjusted. By the method, long-wavelength luminescence of the carbon dots can be realized, and quantum efficiency is improved. Quantum efficiency of the carbon dots having blue fluorescence color is 66%, quantum efficiency of the carbon dots having green fluorescence color is 81%, quantum efficiency of the carbon dots having yellow fluorescence color is 36%, and quantum efficiency of the carbon dots having red fluorescence color is 7%.

Description

technical field [0001] The invention relates to the field of nano-luminescent materials, in particular to a method for preparing carbon dots with adjustable fluorescent colors. Background technique [0002] In the past decade, the discovery of a new metal-free and carbon-rich photoluminescent nanomaterial has attracted extensive attention, namely carbon dots. It has been widely used in bioimaging, sensors, photocatalysts and optoelectronic devices. [0003] There are many ways to prepare carbon dots, including top-down and bottom-up methods. Compared with the preparation of carbon dots by the top-down method, the preparation of carbon dots by the bottom-up method is mainly prepared by dehydration, condensation, polymerization and carbonization of organic precursors. The preparation of carbon dots by the bottom-up method shows its Unique advantages, such as high quantum yield, large-scale synthesis, adjustable emission color, multi-element doping, etc. [0004] So far, man...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65B82Y20/00B82Y40/00G01N21/64
CPCB82Y20/00B82Y40/00C09K11/65G01N21/643
Inventor 张文凯朱维维孟献瑞房晓敏徐元清丁涛徐浩任艳蓉刘保英赫付涛李寒梅
Owner HENAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com