Supercharge Your Innovation With Domain-Expert AI Agents!

Detection method of free zinc ions

A detection method, zinc ion technology, applied in the field of quantum dots, can solve the problems of cumbersome operation and poor sensitivity

Active Publication Date: 2021-08-06
TCL CORPORATION
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a detection method for free zinc ions, aiming to solve the technical problems of poor sensitivity and cumbersome operation of the existing zinc ion detection method

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
  • Detection method of free zinc ions
  • Detection method of free zinc ions
  • Detection method of free zinc ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The above qualitative detection method is described in detail below by taking ZnS quantum dots as an example.

[0062] (1) Provide 2.0 g of ZnS quantum dots modified with 0.5 g of trioctylphosphine, dissolve in 20 ml of chloroform, add 0.6 g of ethanedithiol, and perform ligand exchange under the conditions of microwave power 30W and reaction time of 12 minutes . After the ligand exchange is complete, methanol is added for centrifugation, and after washing and drying, redissolve in 20ml of chloroform.

[0063] (2) The initial fluorescence intensity value of ZnS quantum dots after ligand exchange was measured by a fluorescence spectrometer to be 2134. When heated to 40 degrees Celsius, add 0.1g of titanium dioxide catalyst, then dropwise add 0.5ml of benzimidazole solution with a concentration of 2mg / ml, and measure the fluorescence intensity value every time 0.5ml of benzimidazole solution is added until the fluorescence intensity increases initially around 100% of th...

Embodiment 2

[0067] The above separation method will be described in detail below by taking CdS@ZnS quantum dots as an example.

[0068] (1) Provide 35.0 g of CdS@ZnS quantum dots modified with 5.5 g of oleylamine, dissolve them in 280 ml of chloroform and add 8.1 g of 1,3,4-butanetrithiol, microwave power 900W, reaction time 90 minutes Ligand exchange under conditions. After the ligand exchange is complete, methanol is added for centrifugal washing, and after washing and drying, it is redissolved in 280 ml of chloroform.

[0069] (2) The initial fluorescence intensity value of CdS@ZnS quantum dots after ligand exchange was measured by a fluorescence spectrometer to be 3492. When heated to 80 degrees Celsius, add 4.5g of palladium carbon catalyst, then dropwise add 0.8ml of quinoline solution with a concentration of 2mg / ml, and measure the fluorescence intensity value every time 0.8ml of quinoline solution is added until the fluorescence intensity increases to the initial value 140% or s...

Embodiment 3

[0073] The above separation method will be described in detail below by taking CdZnSe alloy quantum dots as an example.

[0074] (1) Provide 15.8g of CdZnSe alloy quantum dots modified with 2.4g of oleic acid, dissolve in 100ml of chloroform and add 3.1g of 1,2,3,4,8-octanepentathiol, microwave power 200W, reaction time Ligand exchange was carried out at 30 min. After the ligand exchange is complete, methanol is added for centrifugal washing, and after washing and drying, it is redissolved in 100 ml of chloroform.

[0075] (2) The initial fluorescence intensity value of CdZnSe alloy quantum dots after ligand exchange was measured by a fluorescence spectrometer to be 2621. When heated to 65 degrees Celsius, add 2.5g of anhydrous aluminum chloride catalyst, then dropwise add 0.3ml concentration of 2mg / ml phenazine solution, and measure the fluorescence intensity value every time 0.3ml phenazine solution is added until the fluorescence intensity Increase around 125% of the init...

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

No PUM Login to View More

Abstract

A method for detecting free zinc ions, comprising the following steps: providing a sample solution, the sample solution contains quantum dots bound to surface ligands, and the end of the surface ligands away from the binding site contains a The active functional group of the reaction; determine the corresponding relationship between the fluorescence intensity of the quantum dots in the sample solution and the amount of the benzo heterocyclic compound; add the benzo heterocyclic compound to the sample solution to make the benzo heterocyclic compound and the surface ligand Perform an electrophilic reaction to obtain an intermediate solution; wherein, the total amount of the benzoheterocyclic compound added is configured to be greater than the amount that completely reacts with the surface ligand of the quantum dot and is greater than the total amount of free zinc ions in the intermediate solution in the subsequent acidic environment. The amount required for the reaction; after adjusting the intermediate solution to acidity, detect the fluorescence intensity of the quantum dots in the intermediate solution, and determine the amount of free zinc ions in the sample solution according to the fluorescence intensity of the quantum dots in the intermediate solution obtained by detection and the corresponding relationship.

Description

technical field [0001] The invention belongs to the technical field of quantum dots, and in particular relates to a detection method for free zinc ions. Background technique [0002] Quantum Dot (Quantum Dot) and quantum dot-related materials and devices have been hailed as one of the core technological engines of today's Industry 4.0 era. Because each small particle is a single crystal particle, and the size has good tunability, it has high color purity, wide color gamut, high crystal stability, narrow and symmetrical fluorescence emission spectrum, wide and continuous ultraviolet absorption spectrum, which makes it an ideal new material for printed displays. [0003] In optoelectronic lighting and display devices, the purity requirements for optoelectronic starting materials are very high. Generally, no more than 10% of zinc ions (ie, the mass ratio of free zinc ions in the quantum dot solution to the quantum dots) remain after the zinc-containing quantum dots are synthe...

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 Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 邓承雨芦子哲杨一行
Owner TCL CORPORATION
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com