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

Multifunctional switch-type fluorescent carbon quantum dot and preparation method and application thereof

A multifunctional switch and carbon quantum dot technology, applied in the field of fluorescent probes, can solve problems such as single function, complex synthesis process, and low fluorescence quantum yield, and achieve simple operation process, simple operation process, and high fluorescence quantum yield Effect

Inactive Publication Date: 2019-01-11
SHANXI UNIV
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex synthesis process, low fluorescence quantum yield, and single function limit the further application of fluorescent carbon quantum dots.

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
  • Multifunctional switch-type fluorescent carbon quantum dot and preparation method and application thereof
  • Multifunctional switch-type fluorescent carbon quantum dot and preparation method and application thereof
  • Multifunctional switch-type fluorescent carbon quantum dot and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of multifunctional switch type fluorescent carbon quantum dot, the steps comprise: A, 1.5g tartaric acid, 1.5g citric acid and 1.5g urea are placed in the beaker, add 20mL deionized water, stir and sonicate to clarification; B 1. Put the beaker containing the clarified liquid into a microwave oven, take it out after reacting for 10 minutes under 400W power, and obtain a black-brown solid sample; C. Dissolve the sample with deionized water and then centrifuge and filter to obtain a brown-black liquid, which is carbon Quantum dot solution, its relative quantum yield (taking quinine sulfate as a standard) is 20.3%, presents blue fluorescence; D, the above-mentioned carbon quantum dot aqueous solution is freeze-dried for subsequent use.

Embodiment 2

[0032] The switch type fluorescent carbon quantum dot prepared in embodiment 1 is carried out TEM characterization ( figure 1 ), it can be seen that the particle diameter of the carbon quantum dot prepared by the present invention is less than 10nm; the ultraviolet absorption spectrum and fluorescence excitation-emission spectrum are characterized (see figure 2 , image 3 ), infrared spectroscopy and XPS characterization (see Figure 4 , Figure 5 ), indicating that carbon quantum dots contain carboxyl, hydroxyl, amino and other groups.

Embodiment 3

[0034] Get 1.8mL of the multifunctional switch-type fluorescent carbon quantum dot aqueous solution (1mg / mL) prepared in Example 1 and place it in a fluorescent cuvette, add 34 kinds of common ion solutions (0.10mol / L) of 0.2mL respectively, fully mix , scanning the emission spectrum (λ ex =360nm,λ em =467nm), and record the fluorescence intensity, from Figure 6 It can be seen that Cr(VI) can quench the fluorescence of carbon quantum dots, and has good selectivity to Cr(VI).

[0035] Get 1.8mL of the fluorescent carbon quantum dot aqueous solution (0.12mg / mL) prepared in Example 1 and place it in a fluorescent cuvette, add 0.2mL of different concentrations (from low to high) of Cr(VI) respectively, mix well, and The emission spectrum is scanned in the photometer (λ ex =360nm,λ em =467nm), and record the results as Figure 7 .

[0036] Get 1.99 mL of the fluorescent carbon quantum dot aqueous solution (0.12 mg / mL) prepared in Example 1 and place it in a fluorescent cuvet...

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
particle diameteraaaaaaaaaa
quantum efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention provides a multifunctional switch-type fluorescent carbon quantum dot and a preparation method and an application thereof, which belong to the technical field of preparation of a fluorescent probe. The preparation of the carbon quantum dot comprises the following steps: taking tartaric acid, citric acid and urea in deionized water, stirring the materials, and performing ultrasonic treatment to a clarified state; placing the above solution in a microwave oven, reacting the materials at a power of 200 to 500 W for 5-15 minutes, and then taking the material out to obtain a dark brown solid; dissolving the dark brown solid in deionized water, then performing centrifugation and filtering to obtain brownish black liquid, and performing freeze drying to obtain carbon quantum dots. The carbon quantum dot of the invention has the advantages of low preparation cost, simple process, short reaction time, energy saving and environmental protection. The obtained carbon quantum dots canbe used as a switching-type fluorescence sensor for quantitative detection of Cr(VI) ions and ascorbic acid, and have the advantages of stable optical properties and high fluorescence quantum yield,and low cytotoxicity and good biocompatibility expands the application potential for cell imaging.

Description

technical field [0001] The invention relates to a fluorescent probe, in particular to a multifunctional switch-type fluorescent carbon quantum dot and a preparation method thereof, and the application of the carbon quantum dot as a fluorescent probe in the detection of Cr(VI), ascorbic acid, and cell imaging. Background technique [0002] Cr(VI) belongs to the class of heavy metal pollutants and has strong oxidative toxicity. Chromium pollution in the environment mainly comes from industrial production activities such as electroplating, leather, paint and coatings. Studies have shown that Cr(VI) is extremely harmful to the human body, and it can also cause carcinogenesis and mutagenesis at low concentrations. The harm of Cr(VI) in the environment has attracted close attention from all countries, and the discharge of pollutants containing Cr(VI) has been further strictly limited. The World Health Organization has proposed that the concentration of Cr(VI) in drinking water sh...

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): C09K11/65G01N21/64
CPCC09K11/65G01N21/6428G01N21/643G01N2021/6432Y02P20/10
Inventor 贾燕春董川双少敏
Owner SHANXI UNIV
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