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Detection method of free zinc ion

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

Active Publication Date: 2021-07-02
TCL CORPORATION
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  • 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

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  • Detection method of free zinc ion
  • Detection method of free zinc ion
  • Detection method of free zinc ion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The following is a detailed introduction to the qualitative detection method of free zinc ions by taking ZnS quantum dots as an example.

[0049] (1) Provide 1.8g of ZnS quantum dots modified with 1,4-dichlorobutane.

[0050] (2) Using chloroform as a solvent, 1.8g of benzimidazole was reacted with 1,4-dichlorobutane-modified ZnS quantum dots under the action of 0.3g of titanium dioxide catalyst at 40 degrees Celsius, and the fluorescence increase was tested with a fluorescence spectrometer strength.

[0051] (3) Place the ZnS quantum dots reacted in step (2) in a boric acid environment of 0.1mol / L, and the free zinc ions in the quantum dots will react with benzimidazole and / or free benzimidazole on the surface of the quantum dots .

[0052] (4) Whether the fluorescent intensity of the quantum dots after the reaction according to step (3) is further enhanced, it can be judged whether there are free zinc ions in the quantum dots:

[0053] If the fluorescence of the qu...

Embodiment 2

[0056] Taking CdSe@ZnS quantum dots as an example, the qualitative detection method of free zinc ions will be introduced in detail below.

[0057] (1) Provide 28.5g of CdSe@ZnS quantum dots modified with 1,8-octanedithiol.

[0058] (2) Using chloroform as a solvent, 28.5 g of indole was reacted with 1,8-octanedithiol-modified CdSe@ZnS quantum dots at 80 degrees Celsius and 2.8 g of palladium-carbon catalyst.

[0059] (3) Place the CdSe@ZnS quantum dots reacted in step (2) in a 2mol / L hydrogen sulfuric acid environment, and the free zinc ions in the quantum dots will react with the indole and / or free indole on the surface of the quantum dots .

[0060] (4) Whether the fluorescent intensity of the quantum dots after the reaction according to step (3) is further enhanced, it can be judged whether there are free zinc ions in the quantum dots:

[0061] If the fluorescence of the quantum dots continues to increase further, the sample solution contains free zinc ions;

[0062] If ...

Embodiment 3

[0064] Taking CdZnSeTe alloy quantum dots as an example, the qualitative detection method of free zinc ions will be introduced in detail below.

[0065] (1) Provide 11.5g of CdZnSeTe alloy quantum dots modified with 1,6-hexadiene.

[0066] (2) Using chloroform as a solvent, 11.5 g of benzofuran was reacted with 1,4-hexadiene-modified CdZnSeTe alloy quantum dots at 60 degrees Celsius and 1.5 g of titanium dioxide.

[0067] (3) Place the CdZnSeTe alloy quantum dots reacted in step (2) in the benzoic acid environment of 1.0mol / L, and the free zinc ions in the quantum dots will react with the benzofuran and / or free benzofuran on the surface of the quantum dots. furan reaction.

[0068] (4) Whether the fluorescent intensity of the quantum dots after the reaction according to step (3) is further enhanced, it can be judged whether there are free zinc ions in the quantum dots:

[0069] If the fluorescence of the quantum dots continues to increase further, the sample solution contain...

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Abstract

The invention belongs to the technical field of quantum dots, and specifically relates to a detection method for free zinc ions, comprising the following steps: providing a sample solution containing quantum dots with surface ligands bound to the surface, and the surface ligands are far away from the binding One end of the site contains an active functional group, and the active functional group is an active functional group capable of electrophilic reaction with the benzo heterocyclic compound; the benzo heterocyclic compound is added to the sample solution to make the benzo heterocyclic compound Perform electrophilic reaction with the surface ligand to obtain an intermediate solution; adjust the intermediate solution to acidity, and then determine whether the sample solution contains free zinc ions according to the fluorescence change of the quantum dots in the intermediate solution. The detection method has the characteristics of easy operation, simplicity, rapidity and low cost.

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 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] As we all know, in optoelectronic lighting and display devices, the purity requirements of optoelectronic starting materials are very high. The introduction of trace and trace amounts of zinc ions will not only affect the optical and electrical properties of the optoelectronic material itself, but more seriously, zinc ion...

Claims

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Application Information

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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
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